repo creation with initial code after cloning public repo

MediaBrowser.Controller/MediaEncoding/BaseEncodingJobOptions.cs

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+#nullable disable
+
+#pragma warning disable CS1591
+
+using System;
+using System.Collections.Generic;
+using MediaBrowser.Model.Dlna;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public class BaseEncodingJobOptions
+    {
+        public BaseEncodingJobOptions()
+        {
+            EnableAutoStreamCopy = true;
+            AllowVideoStreamCopy = true;
+            AllowAudioStreamCopy = true;
+            Context = EncodingContext.Streaming;
+            StreamOptions = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        }
+
+        /// <summary>
+        /// Gets or sets the id.
+        /// </summary>
+        /// <value>The id.</value>
+        public Guid Id { get; set; }
+
+        public string MediaSourceId { get; set; }
+
+        public string DeviceId { get; set; }
+
+        public string Container { get; set; }
+
+        /// <summary>
+        /// Gets or sets the audio codec.
+        /// </summary>
+        /// <value>The audio codec.</value>
+        public string AudioCodec { get; set; }
+
+        public bool EnableAutoStreamCopy { get; set; }
+
+        public bool AllowVideoStreamCopy { get; set; }
+
+        public bool AllowAudioStreamCopy { get; set; }
+
+        /// <summary>
+        /// Gets or sets the audio sample rate.
+        /// </summary>
+        /// <value>The audio sample rate.</value>
+        public int? AudioSampleRate { get; set; }
+
+        public int? MaxAudioBitDepth { get; set; }
+
+        /// <summary>
+        /// Gets or sets the audio bit rate.
+        /// </summary>
+        /// <value>The audio bit rate.</value>
+        public int? AudioBitRate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the audio channels.
+        /// </summary>
+        /// <value>The audio channels.</value>
+        public int? AudioChannels { get; set; }
+
+        public int? MaxAudioChannels { get; set; }
+
+        public bool Static { get; set; }
+
+        /// <summary>
+        /// Gets or sets the profile.
+        /// </summary>
+        /// <value>The profile.</value>
+        public string Profile { get; set; }
+
+        /// <summary>
+        /// Gets or sets the video range type.
+        /// </summary>
+        /// <value>The video range type.</value>
+        public string VideoRangeType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the level.
+        /// </summary>
+        /// <value>The level.</value>
+        public string Level { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec tag.
+        /// </summary>
+        /// <value>The codec tag.</value>
+        public string CodecTag { get; set; }
+
+        /// <summary>
+        /// Gets or sets the framerate.
+        /// </summary>
+        /// <value>The framerate.</value>
+        public float? Framerate { get; set; }
+
+        public float? MaxFramerate { get; set; }
+
+        public bool CopyTimestamps { get; set; }
+
+        /// <summary>
+        /// Gets or sets the start time ticks.
+        /// </summary>
+        /// <value>The start time ticks.</value>
+        public long? StartTimeTicks { get; set; }
+
+        /// <summary>
+        /// Gets or sets the width.
+        /// </summary>
+        /// <value>The width.</value>
+        public int? Width { get; set; }
+
+        /// <summary>
+        /// Gets or sets the height.
+        /// </summary>
+        /// <value>The height.</value>
+        public int? Height { get; set; }
+
+        /// <summary>
+        /// Gets or sets the width of the max.
+        /// </summary>
+        /// <value>The width of the max.</value>
+        public int? MaxWidth { get; set; }
+
+        /// <summary>
+        /// Gets or sets the height of the max.
+        /// </summary>
+        /// <value>The height of the max.</value>
+        public int? MaxHeight { get; set; }
+
+        /// <summary>
+        /// Gets or sets the video bit rate.
+        /// </summary>
+        /// <value>The video bit rate.</value>
+        public int? VideoBitRate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the index of the subtitle stream.
+        /// </summary>
+        /// <value>The index of the subtitle stream.</value>
+        public int? SubtitleStreamIndex { get; set; }
+
+        public SubtitleDeliveryMethod SubtitleMethod { get; set; }
+
+        public int? MaxRefFrames { get; set; }
+
+        public int? MaxVideoBitDepth { get; set; }
+
+        public bool RequireAvc { get; set; }
+
+        public bool DeInterlace { get; set; }
+
+        public bool RequireNonAnamorphic { get; set; }
+
+        public int? TranscodingMaxAudioChannels { get; set; }
+
+        public int? CpuCoreLimit { get; set; }
+
+        public string LiveStreamId { get; set; }
+
+        public bool EnableMpegtsM2TsMode { get; set; }
+
+        /// <summary>
+        /// Gets or sets the video codec.
+        /// </summary>
+        /// <value>The video codec.</value>
+        public string VideoCodec { get; set; }
+
+        public string SubtitleCodec { get; set; }
+
+        public string TranscodeReasons { get; set; }
+
+        /// <summary>
+        /// Gets or sets the index of the audio stream.
+        /// </summary>
+        /// <value>The index of the audio stream.</value>
+        public int? AudioStreamIndex { get; set; }
+
+        /// <summary>
+        /// Gets or sets the index of the video stream.
+        /// </summary>
+        /// <value>The index of the video stream.</value>
+        public int? VideoStreamIndex { get; set; }
+
+        public EncodingContext Context { get; set; }
+
+        public Dictionary<string, string> StreamOptions { get; set; }
+
+        public bool EnableAudioVbrEncoding { get; set; }
+
+        public bool AlwaysBurnInSubtitleWhenTranscoding { get; set; }
+
+        public string GetOption(string qualifier, string name)
+        {
+            var value = GetOption(qualifier + "-" + name);
+
+            if (string.IsNullOrEmpty(value))
+            {
+                value = GetOption(name);
+            }
+
+            return value;
+        }
+
+        public string GetOption(string name)
+        {
+            if (StreamOptions.TryGetValue(name, out var value))
+            {
+                return value;
+            }
+
+            return null;
+        }
+    }
+}

MediaBrowser.Controller/MediaEncoding/BitStreamFilterOptionType.cs

@@ -0,0 +1,32 @@
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// Enum BitStreamFilterOptionType.
+/// </summary>
+public enum BitStreamFilterOptionType
+{
+    /// <summary>
+    /// hevc_metadata bsf with remove_dovi option.
+    /// </summary>
+    HevcMetadataRemoveDovi = 0,
+
+    /// <summary>
+    /// hevc_metadata bsf with remove_hdr10plus option.
+    /// </summary>
+    HevcMetadataRemoveHdr10Plus = 1,
+
+    /// <summary>
+    /// av1_metadata bsf with remove_dovi option.
+    /// </summary>
+    Av1MetadataRemoveDovi = 2,
+
+    /// <summary>
+    /// av1_metadata bsf with remove_hdr10plus option.
+    /// </summary>
+    Av1MetadataRemoveHdr10Plus = 3,
+
+    /// <summary>
+    /// dovi_rpu bsf with strip option.
+    /// </summary>
+    DoviRpuStrip = 4,
+}

MediaBrowser.Controller/MediaEncoding/DownMixAlgorithmsHelper.cs

@@ -0,0 +1,74 @@
+using System.Collections.Generic;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// Describes the downmix algorithms capabilities.
+/// </summary>
+public static class DownMixAlgorithmsHelper
+{
+    /// <summary>
+    /// The filter string of the DownMixStereoAlgorithms.
+    /// The index is the tuple of (algorithm, layout).
+    /// </summary>
+    public static readonly Dictionary<(DownMixStereoAlgorithms, string), string> AlgorithmFilterStrings = new()
+    {
+        { (DownMixStereoAlgorithms.Dave750, "5.1"), "pan=stereo|c0=0.5*c2+0.707*c0+0.707*c4+0.5*c3|c1=0.5*c2+0.707*c1+0.707*c5+0.5*c3" },
+        // Use AC-4 algorithm to downmix 7.1 inputs to 5.1 first
+        { (DownMixStereoAlgorithms.Dave750, "7.1"), "pan=5.1(side)|c0=c0|c1=c1|c2=c2|c3=c3|c4=0.707*c4+0.707*c6|c5=0.707*c5+0.707*c7,pan=stereo|c0=0.5*c2+0.707*c0+0.707*c4+0.5*c3|c1=0.5*c2+0.707*c1+0.707*c5+0.5*c3" },
+        { (DownMixStereoAlgorithms.NightmodeDialogue, "5.1"), "pan=stereo|c0=c2+0.30*c0+0.30*c4|c1=c2+0.30*c1+0.30*c5" },
+        // Use AC-4 algorithm to downmix 7.1 inputs to 5.1 first
+        { (DownMixStereoAlgorithms.NightmodeDialogue, "7.1"), "pan=5.1(side)|c0=c0|c1=c1|c2=c2|c3=c3|c4=0.707*c4+0.707*c6|c5=0.707*c5+0.707*c7,pan=stereo|c0=c2+0.30*c0+0.30*c4|c1=c2+0.30*c1+0.30*c5" },
+        { (DownMixStereoAlgorithms.Rfc7845, "3.0"), "pan=stereo|c0=0.414214*c2+0.585786*c0|c1=0.414214*c2+0.585786*c1" },
+        { (DownMixStereoAlgorithms.Rfc7845, "quad"), "pan=stereo|c0=0.422650*c0+0.366025*c2+0.211325*c3|c1=0.422650*c1+0.366025*c3+0.211325*c2" },
+        { (DownMixStereoAlgorithms.Rfc7845, "5.0"), "pan=stereo|c0=0.460186*c2+0.650802*c0+0.563611*c3+0.325401*c4|c1=0.460186*c2+0.650802*c1+0.563611*c4+0.325401*c3" },
+        { (DownMixStereoAlgorithms.Rfc7845, "5.1"), "pan=stereo|c0=0.374107*c2+0.529067*c0+0.458186*c4+0.264534*c5+0.374107*c3|c1=0.374107*c2+0.529067*c1+0.458186*c5+0.264534*c4+0.374107*c3" },
+        { (DownMixStereoAlgorithms.Rfc7845, "6.1"), "pan=stereo|c0=0.321953*c2+0.455310*c0+0.394310*c5+0.227655*c6+0.278819*c4+0.321953*c3|c1=0.321953*c2+0.455310*c1+0.394310*c6+0.227655*c5+0.278819*c4+0.321953*c3" },
+        { (DownMixStereoAlgorithms.Rfc7845, "7.1"), "pan=stereo|c0=0.274804*c2+0.388631*c0+0.336565*c6+0.194316*c7+0.336565*c4+0.194316*c5+0.274804*c3|c1=0.274804*c2+0.388631*c1+0.336565*c7+0.194316*c6+0.336565*c5+0.194316*c4+0.274804*c3" },
+        { (DownMixStereoAlgorithms.Ac4, "3.0"), "pan=stereo|c0=c0+0.707*c2|c1=c1+0.707*c2" },
+        { (DownMixStereoAlgorithms.Ac4, "5.0"), "pan=stereo|c0=c0+0.707*c2+0.707*c3|c1=c1+0.707*c2+0.707*c4" },
+        { (DownMixStereoAlgorithms.Ac4, "5.1"), "pan=stereo|c0=c0+0.707*c2+0.707*c4|c1=c1+0.707*c2+0.707*c5" },
+        { (DownMixStereoAlgorithms.Ac4, "7.0"), "pan=5.0(side)|c0=c0|c1=c1|c2=c2|c3=0.707*c3+0.707*c5|c4=0.707*c4+0.707*c6,pan=stereo|c0=c0+0.707*c2+0.707*c3|c1=c1+0.707*c2+0.707*c4" },
+        { (DownMixStereoAlgorithms.Ac4, "7.1"), "pan=5.1(side)|c0=c0|c1=c1|c2=c2|c3=c3|c4=0.707*c4+0.707*c6|c5=0.707*c5+0.707*c7,pan=stereo|c0=c0+0.707*c2+0.707*c4|c1=c1+0.707*c2+0.707*c5" },
+    };
+
+    /// <summary>
+    /// Get the audio channel layout string from the audio stream
+    /// If the input audio string does not have a valid layout string, guess from channel count.
+    /// </summary>
+    /// <param name="audioStream">The audio stream to get layout.</param>
+    /// <returns>Channel Layout string.</returns>
+    public static string InferChannelLayout(MediaStream audioStream)
+    {
+        if (!string.IsNullOrWhiteSpace(audioStream.ChannelLayout))
+        {
+            // Note: BDMVs do not derive this string from ffmpeg, which would cause ambiguity with 4-channel audio
+            // "quad" => 2 front and 2 rear, "4.0" => 3 front and 1 rear
+            // BDMV will always use "4.0" in this case
+            // Because the quad layout is super rare in BDs, we will use "4.0" as is here
+            return audioStream.ChannelLayout;
+        }
+
+        if (audioStream.Channels is null)
+        {
+            return string.Empty;
+        }
+
+        // When we don't have definitive channel layout, we have to guess from the channel count
+        // Guessing is not always correct, but for most videos we don't have to guess like this as the definitive layout is recorded during scan
+        var inferredLayout = audioStream.Channels.Value switch
+        {
+            1 => "mono",
+            2 => "stereo",
+            3 => "2.1", // Could also be 3.0, prefer 2.1
+            4 => "4.0", // Could also be quad (with rear left and rear right) and 3.1 with LFE. prefer 4.0 with front center and back center
+            5 => "5.0",
+            6 => "5.1", // Could also be 6.0 or hexagonal, prefer 5.1
+            7 => "6.1", // Could also be 7.0, prefer 6.1
+            8 => "7.1", // Could also be 8.0, prefer 7.1
+            _ => string.Empty // Return empty string for not supported layout
+        };
+        return inferredLayout;
+    }
+}

MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs

@@ -0,0 +1,738 @@
+#nullable disable
+
+#pragma warning disable CS1591, SA1401
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using Jellyfin.Data.Enums;
+using Jellyfin.Database.Implementations.Entities;
+using MediaBrowser.Model.Dlna;
+using MediaBrowser.Model.Drawing;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.MediaInfo;
+using MediaBrowser.Model.Net;
+using MediaBrowser.Model.Session;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    // For now, a common base class until the API and MediaEncoding classes are unified
+    public class EncodingJobInfo
+    {
+        private static readonly char[] _separators = ['|', ','];
+
+        private TranscodeReason? _transcodeReasons = null;
+
+        public EncodingJobInfo(TranscodingJobType jobType)
+        {
+            TranscodingType = jobType;
+            RemoteHttpHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+            SupportedAudioCodecs = Array.Empty<string>();
+            SupportedVideoCodecs = Array.Empty<string>();
+            SupportedSubtitleCodecs = Array.Empty<string>();
+        }
+
+        public int? OutputAudioBitrate { get; set; }
+
+        public int? OutputAudioChannels { get; set; }
+
+        public TranscodeReason TranscodeReasons
+        {
+            get
+            {
+                if (!_transcodeReasons.HasValue)
+                {
+                    if (BaseRequest.TranscodeReasons is null)
+                    {
+                        _transcodeReasons = 0;
+                        return 0;
+                    }
+
+                    _ = Enum.TryParse<TranscodeReason>(BaseRequest.TranscodeReasons, out var reason);
+                    _transcodeReasons = reason;
+                }
+
+                return _transcodeReasons.Value;
+            }
+        }
+
+        public IProgress<double> Progress { get; set; }
+
+        public MediaStream VideoStream { get; set; }
+
+        public VideoType VideoType { get; set; }
+
+        public Dictionary<string, string> RemoteHttpHeaders { get; set; }
+
+        public string OutputVideoCodec { get; set; }
+
+        public MediaProtocol InputProtocol { get; set; }
+
+        public string MediaPath { get; set; }
+
+        public bool IsInputVideo { get; set; }
+
+        public string OutputAudioCodec { get; set; }
+
+        public int? OutputVideoBitrate { get; set; }
+
+        public MediaStream SubtitleStream { get; set; }
+
+        public SubtitleDeliveryMethod SubtitleDeliveryMethod { get; set; }
+
+        public string[] SupportedSubtitleCodecs { get; set; }
+
+        public int InternalSubtitleStreamOffset { get; set; }
+
+        public MediaSourceInfo MediaSource { get; set; }
+
+        public User User { get; set; }
+
+        public long? RunTimeTicks { get; set; }
+
+        public bool ReadInputAtNativeFramerate { get; set; }
+
+        public string OutputFilePath { get; set; }
+
+        public string MimeType { get; set; }
+
+        public bool IgnoreInputDts => MediaSource.IgnoreDts;
+
+        public bool IgnoreInputIndex => MediaSource.IgnoreIndex;
+
+        public bool GenPtsInput => MediaSource.GenPtsInput;
+
+        public bool DiscardCorruptFramesInput => false;
+
+        public bool EnableFastSeekInput => false;
+
+        public bool GenPtsOutput => false;
+
+        public string OutputContainer { get; set; }
+
+        public string OutputVideoSync { get; set; }
+
+        public string AlbumCoverPath { get; set; }
+
+        public string InputAudioSync { get; set; }
+
+        public string InputVideoSync { get; set; }
+
+        public TransportStreamTimestamp InputTimestamp { get; set; }
+
+        public MediaStream AudioStream { get; set; }
+
+        public string[] SupportedAudioCodecs { get; set; }
+
+        public string[] SupportedVideoCodecs { get; set; }
+
+        public string InputContainer { get; set; }
+
+        public IsoType? IsoType { get; set; }
+
+        public BaseEncodingJobOptions BaseRequest { get; set; }
+
+        public bool IsVideoRequest { get; set; }
+
+        public TranscodingJobType TranscodingType { get; set; }
+
+        public long? StartTimeTicks => BaseRequest.StartTimeTicks;
+
+        public bool CopyTimestamps => BaseRequest.CopyTimestamps;
+
+        public bool IsSegmentedLiveStream
+            => TranscodingType != TranscodingJobType.Progressive && !RunTimeTicks.HasValue;
+
+        public int? TotalOutputBitrate => (OutputAudioBitrate ?? 0) + (OutputVideoBitrate ?? 0);
+
+        public int? OutputWidth
+        {
+            get
+            {
+                if (VideoStream is not null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
+                {
+                    var size = new ImageDimensions(VideoStream.Width.Value, VideoStream.Height.Value);
+
+                    var newSize = DrawingUtils.Resize(
+                        size,
+                        BaseRequest.Width ?? 0,
+                        BaseRequest.Height ?? 0,
+                        BaseRequest.MaxWidth ?? 0,
+                        BaseRequest.MaxHeight ?? 0);
+
+                    return newSize.Width;
+                }
+
+                if (!IsVideoRequest)
+                {
+                    return null;
+                }
+
+                return BaseRequest.MaxWidth ?? BaseRequest.Width;
+            }
+        }
+
+        public int? OutputHeight
+        {
+            get
+            {
+                if (VideoStream is not null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
+                {
+                    var size = new ImageDimensions(VideoStream.Width.Value, VideoStream.Height.Value);
+
+                    var newSize = DrawingUtils.Resize(
+                        size,
+                        BaseRequest.Width ?? 0,
+                        BaseRequest.Height ?? 0,
+                        BaseRequest.MaxWidth ?? 0,
+                        BaseRequest.MaxHeight ?? 0);
+
+                    return newSize.Height;
+                }
+
+                if (!IsVideoRequest)
+                {
+                    return null;
+                }
+
+                return BaseRequest.MaxHeight ?? BaseRequest.Height;
+            }
+        }
+
+        public int? OutputAudioSampleRate
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputAudioCodec))
+                {
+                    if (AudioStream is not null)
+                    {
+                        return AudioStream.SampleRate;
+                    }
+                }
+                else if (BaseRequest.AudioSampleRate.HasValue)
+                {
+                    // Don't exceed what the encoder supports
+                    // Seeing issues of attempting to encode to 88200
+                    return BaseRequest.AudioSampleRate.Value;
+                }
+
+                return null;
+            }
+        }
+
+        public int? OutputAudioBitDepth
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputAudioCodec))
+                {
+                    if (AudioStream is not null)
+                    {
+                        return AudioStream.BitDepth;
+                    }
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target video level.
+        /// </summary>
+        public double? TargetVideoLevel
+        {
+            get
+            {
+                if (BaseRequest.Static || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.Level;
+                }
+
+                var level = GetRequestedLevel(ActualOutputVideoCodec);
+                if (double.TryParse(level, CultureInfo.InvariantCulture, out var result))
+                {
+                    return result;
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target video bit depth.
+        /// </summary>
+        public int? TargetVideoBitDepth
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.BitDepth;
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target reference frames.
+        /// </summary>
+        /// <value>The target reference frames.</value>
+        public int? TargetRefFrames
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.RefFrames;
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target framerate.
+        /// </summary>
+        public float? TargetFramerate
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.ReferenceFrameRate;
+                }
+
+                return BaseRequest.MaxFramerate ?? BaseRequest.Framerate;
+            }
+        }
+
+        public TransportStreamTimestamp TargetTimestamp
+        {
+            get
+            {
+                if (BaseRequest.Static)
+                {
+                    return InputTimestamp;
+                }
+
+                return string.Equals(OutputContainer, "m2ts", StringComparison.OrdinalIgnoreCase) ?
+                    TransportStreamTimestamp.Valid :
+                    TransportStreamTimestamp.None;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target packet length.
+        /// </summary>
+        public int? TargetPacketLength
+        {
+            get
+            {
+                if (BaseRequest.Static || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.PacketLength;
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target video profile.
+        /// </summary>
+        public string TargetVideoProfile
+        {
+            get
+            {
+                if (BaseRequest.Static || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.Profile;
+                }
+
+                var requestedProfile = GetRequestedProfiles(ActualOutputVideoCodec).FirstOrDefault();
+                if (!string.IsNullOrEmpty(requestedProfile))
+                {
+                    return requestedProfile;
+                }
+
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the target video range type.
+        /// </summary>
+        public VideoRangeType TargetVideoRangeType
+        {
+            get
+            {
+                if (BaseRequest.Static || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.VideoRangeType ?? VideoRangeType.Unknown;
+                }
+
+                if (Enum.TryParse(GetRequestedRangeTypes(ActualOutputVideoCodec).FirstOrDefault() ?? "Unknown", true, out VideoRangeType requestedRangeType))
+                {
+                    return requestedRangeType;
+                }
+
+                return VideoRangeType.Unknown;
+            }
+        }
+
+        public string TargetVideoCodecTag
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.CodecTag;
+                }
+
+                return null;
+            }
+        }
+
+        public bool? IsTargetAnamorphic
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.IsAnamorphic;
+                }
+
+                return false;
+            }
+        }
+
+        public string ActualOutputVideoCodec
+        {
+            get
+            {
+                if (VideoStream is null)
+                {
+                    return null;
+                }
+
+                if (EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream.Codec;
+                }
+
+                return OutputVideoCodec;
+            }
+        }
+
+        public string ActualOutputAudioCodec
+        {
+            get
+            {
+                if (AudioStream is null)
+                {
+                    return null;
+                }
+
+                if (EncodingHelper.IsCopyCodec(OutputAudioCodec))
+                {
+                    return AudioStream.Codec;
+                }
+
+                return OutputAudioCodec;
+            }
+        }
+
+        public bool? IsTargetInterlaced
+        {
+            get
+            {
+                if (BaseRequest.Static
+                    || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.IsInterlaced;
+                }
+
+                if (DeInterlace(ActualOutputVideoCodec, true))
+                {
+                    return false;
+                }
+
+                return VideoStream?.IsInterlaced;
+            }
+        }
+
+        public bool? IsTargetAVC
+        {
+            get
+            {
+                if (BaseRequest.Static || EncodingHelper.IsCopyCodec(OutputVideoCodec))
+                {
+                    return VideoStream?.IsAVC;
+                }
+
+                return false;
+            }
+        }
+
+        public int? TargetVideoStreamCount
+        {
+            get
+            {
+                if (BaseRequest.Static)
+                {
+                    return GetMediaStreamCount(MediaStreamType.Video, int.MaxValue);
+                }
+
+                return GetMediaStreamCount(MediaStreamType.Video, 1);
+            }
+        }
+
+        public int? TargetAudioStreamCount
+        {
+            get
+            {
+                if (BaseRequest.Static)
+                {
+                    return GetMediaStreamCount(MediaStreamType.Audio, int.MaxValue);
+                }
+
+                return GetMediaStreamCount(MediaStreamType.Audio, 1);
+            }
+        }
+
+        public bool EnableAudioVbrEncoding => BaseRequest.EnableAudioVbrEncoding;
+
+        public int HlsListSize => 0;
+
+        private int? GetMediaStreamCount(MediaStreamType type, int limit)
+        {
+            var count = MediaSource.GetStreamCount(type);
+
+            if (count.HasValue)
+            {
+                count = Math.Min(count.Value, limit);
+            }
+
+            return count;
+        }
+
+        public string GetMimeType(string outputPath, bool enableStreamDefault = true)
+        {
+            if (!string.IsNullOrEmpty(MimeType))
+            {
+                return MimeType;
+            }
+
+            if (enableStreamDefault)
+            {
+                return MimeTypes.GetMimeType(outputPath);
+            }
+
+            return MimeTypes.GetMimeType(outputPath, null);
+        }
+
+        public bool DeInterlace(string videoCodec, bool forceDeinterlaceIfSourceIsInterlaced)
+        {
+            var videoStream = VideoStream;
+            var isInputInterlaced = videoStream is not null && videoStream.IsInterlaced;
+
+            if (!isInputInterlaced)
+            {
+                return false;
+            }
+
+            // Support general param
+            if (BaseRequest.DeInterlace)
+            {
+                return true;
+            }
+
+            if (!string.IsNullOrEmpty(videoCodec))
+            {
+                if (string.Equals(BaseRequest.GetOption(videoCodec, "deinterlace"), "true", StringComparison.OrdinalIgnoreCase))
+                {
+                    return true;
+                }
+            }
+
+            return forceDeinterlaceIfSourceIsInterlaced;
+        }
+
+        public string[] GetRequestedProfiles(string codec)
+        {
+            if (!string.IsNullOrEmpty(BaseRequest.Profile))
+            {
+                return BaseRequest.Profile.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var profile = BaseRequest.GetOption(codec, "profile");
+
+                if (!string.IsNullOrEmpty(profile))
+                {
+                    return profile.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+                }
+            }
+
+            return Array.Empty<string>();
+        }
+
+        public string[] GetRequestedRangeTypes(string codec)
+        {
+            if (!string.IsNullOrEmpty(BaseRequest.VideoRangeType))
+            {
+                return BaseRequest.VideoRangeType.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var rangetype = BaseRequest.GetOption(codec, "rangetype");
+
+                if (!string.IsNullOrEmpty(rangetype))
+                {
+                    return rangetype.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+                }
+            }
+
+            return Array.Empty<string>();
+        }
+
+        public string[] GetRequestedCodecTags(string codec)
+        {
+            if (!string.IsNullOrEmpty(BaseRequest.CodecTag))
+            {
+                return BaseRequest.CodecTag.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var codectag = BaseRequest.GetOption(codec, "codectag");
+
+                if (!string.IsNullOrEmpty(codectag))
+                {
+                    return codectag.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
+                }
+            }
+
+            return Array.Empty<string>();
+        }
+
+        public string GetRequestedLevel(string codec)
+        {
+            if (!string.IsNullOrEmpty(BaseRequest.Level))
+            {
+                return BaseRequest.Level;
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                return BaseRequest.GetOption(codec, "level");
+            }
+
+            return null;
+        }
+
+        public int? GetRequestedMaxRefFrames(string codec)
+        {
+            if (BaseRequest.MaxRefFrames.HasValue)
+            {
+                return BaseRequest.MaxRefFrames;
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var value = BaseRequest.GetOption(codec, "maxrefframes");
+                if (int.TryParse(value, CultureInfo.InvariantCulture, out var result))
+                {
+                    return result;
+                }
+            }
+
+            return null;
+        }
+
+        public int? GetRequestedVideoBitDepth(string codec)
+        {
+            if (BaseRequest.MaxVideoBitDepth.HasValue)
+            {
+                return BaseRequest.MaxVideoBitDepth;
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var value = BaseRequest.GetOption(codec, "videobitdepth");
+                if (int.TryParse(value, CultureInfo.InvariantCulture, out var result))
+                {
+                    return result;
+                }
+            }
+
+            return null;
+        }
+
+        public int? GetRequestedAudioBitDepth(string codec)
+        {
+            if (BaseRequest.MaxAudioBitDepth.HasValue)
+            {
+                return BaseRequest.MaxAudioBitDepth;
+            }
+
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var value = BaseRequest.GetOption(codec, "audiobitdepth");
+                if (int.TryParse(value, CultureInfo.InvariantCulture, out var result))
+                {
+                    return result;
+                }
+            }
+
+            return null;
+        }
+
+        public int? GetRequestedAudioChannels(string codec)
+        {
+            if (!string.IsNullOrEmpty(codec))
+            {
+                var value = BaseRequest.GetOption(codec, "audiochannels");
+                if (int.TryParse(value, CultureInfo.InvariantCulture, out var result))
+                {
+                    return result;
+                }
+            }
+
+            if (BaseRequest.MaxAudioChannels.HasValue)
+            {
+                return BaseRequest.MaxAudioChannels;
+            }
+
+            if (BaseRequest.AudioChannels.HasValue)
+            {
+                return BaseRequest.AudioChannels;
+            }
+
+            if (BaseRequest.TranscodingMaxAudioChannels.HasValue)
+            {
+                return BaseRequest.TranscodingMaxAudioChannels;
+            }
+
+            return null;
+        }
+
+        public virtual void ReportTranscodingProgress(TimeSpan? transcodingPosition, float? framerate, double? percentComplete, long? bytesTranscoded, int? bitRate)
+        {
+            Progress.Report(percentComplete.Value);
+        }
+    }
+}

MediaBrowser.Controller/MediaEncoding/FilterOptionType.cs

@@ -0,0 +1,53 @@
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Enum FilterOptionType.
+    /// </summary>
+    public enum FilterOptionType
+    {
+        /// <summary>
+        /// The scale_cuda_format.
+        /// </summary>
+        ScaleCudaFormat = 0,
+
+        /// <summary>
+        /// The tonemap_cuda_name.
+        /// </summary>
+        TonemapCudaName = 1,
+
+        /// <summary>
+        /// The tonemap_opencl_bt2390.
+        /// </summary>
+        TonemapOpenclBt2390 = 2,
+
+        /// <summary>
+        /// The overlay_opencl_framesync.
+        /// </summary>
+        OverlayOpenclFrameSync = 3,
+
+        /// <summary>
+        /// The overlay_vaapi_framesync.
+        /// </summary>
+        OverlayVaapiFrameSync = 4,
+
+        /// <summary>
+        /// The overlay_vulkan_framesync.
+        /// </summary>
+        OverlayVulkanFrameSync = 5,
+
+        /// <summary>
+        /// The transpose_opencl_reversal.
+        /// </summary>
+        TransposeOpenclReversal = 6,
+
+        /// <summary>
+        /// The overlay_opencl_alpha_format.
+        /// </summary>
+        OverlayOpenclAlphaFormat = 7,
+
+        /// <summary>
+        /// The overlay_cuda_alpha_format.
+        /// </summary>
+        OverlayCudaAlphaFormat = 8
+    }
+}

MediaBrowser.Controller/MediaEncoding/IAttachmentExtractor.cs

@@ -0,0 +1,41 @@
+#nullable disable
+
+#pragma warning disable CS1591
+
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+public interface IAttachmentExtractor
+{
+    /// <summary>
+    /// Gets the path to the attachment file.
+    /// </summary>
+    /// <param name="item">The <see cref="BaseItem"/>.</param>
+    /// <param name="mediaSourceId">The media source id.</param>
+    /// <param name="attachmentStreamIndex">The attachment index.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The async task.</returns>
+    Task<(MediaAttachment Attachment, Stream Stream)> GetAttachment(
+        BaseItem item,
+        string mediaSourceId,
+        int attachmentStreamIndex,
+        CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Gets the path to the attachment file.
+    /// </summary>
+    /// <param name="inputFile">The input file path.</param>
+    /// <param name="mediaSource">The <see cref="MediaSourceInfo" /> source id.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The async task.</returns>
+    Task ExtractAllAttachments(
+        string inputFile,
+        MediaSourceInfo mediaSource,
+        CancellationToken cancellationToken);
+}

MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs

@@ -0,0 +1,285 @@
+#nullable disable
+
+#pragma warning disable CS1591
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Configuration;
+using MediaBrowser.Model.Dlna;
+using MediaBrowser.Model.Drawing;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.MediaInfo;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Interface IMediaEncoder.
+    /// </summary>
+    public interface IMediaEncoder : ITranscoderSupport
+    {
+        /// <summary>
+        /// Gets the encoder path.
+        /// </summary>
+        /// <value>The encoder path.</value>
+        string EncoderPath { get; }
+
+        /// <summary>
+        /// Gets the probe path.
+        /// </summary>
+        /// <value>The probe path.</value>
+        string ProbePath { get; }
+
+        /// <summary>
+        /// Gets the version of encoder.
+        /// </summary>
+        /// <returns>The version of encoder.</returns>
+        Version EncoderVersion { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether p key pausing is supported.
+        /// </summary>
+        /// <value><c>true</c> if p key pausing is supported, <c>false</c> otherwise.</value>
+        bool IsPkeyPauseSupported { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the configured Vaapi device is from AMD(radeonsi/r600 Mesa driver).
+        /// </summary>
+        /// <value><c>true</c> if the Vaapi device is an AMD(radeonsi/r600 Mesa driver) GPU, <c>false</c> otherwise.</value>
+        bool IsVaapiDeviceAmd { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the configured Vaapi device is from Intel(iHD driver).
+        /// </summary>
+        /// <value><c>true</c> if the Vaapi device is an Intel(iHD driver) GPU, <c>false</c> otherwise.</value>
+        bool IsVaapiDeviceInteliHD { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the configured Vaapi device is from Intel(legacy i965 driver).
+        /// </summary>
+        /// <value><c>true</c> if the Vaapi device is an Intel(legacy i965 driver) GPU, <c>false</c> otherwise.</value>
+        bool IsVaapiDeviceInteli965 { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the configured Vaapi device supports vulkan drm format modifier.
+        /// </summary>
+        /// <value><c>true</c> if the Vaapi device supports vulkan drm format modifier, <c>false</c> otherwise.</value>
+        bool IsVaapiDeviceSupportVulkanDrmModifier { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the configured Vaapi device supports vulkan drm interop via dma-buf.
+        /// </summary>
+        /// <value><c>true</c> if the Vaapi device supports vulkan drm interop, <c>false</c> otherwise.</value>
+        bool IsVaapiDeviceSupportVulkanDrmInterop { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether av1 decoding is available via VideoToolbox.
+        /// </summary>
+        /// <value><c>true</c> if the av1 is available via VideoToolbox, <c>false</c> otherwise.</value>
+        bool IsVideoToolboxAv1DecodeAvailable { get; }
+
+        /// <summary>
+        /// Whether given encoder codec is supported.
+        /// </summary>
+        /// <param name="encoder">The encoder.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
+        bool SupportsEncoder(string encoder);
+
+        /// <summary>
+        /// Whether given decoder codec is supported.
+        /// </summary>
+        /// <param name="decoder">The decoder.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
+        bool SupportsDecoder(string decoder);
+
+        /// <summary>
+        /// Whether given hardware acceleration type is supported.
+        /// </summary>
+        /// <param name="hwaccel">The hwaccel.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
+        bool SupportsHwaccel(string hwaccel);
+
+        /// <summary>
+        /// Whether given filter is supported.
+        /// </summary>
+        /// <param name="filter">The filter.</param>
+        /// <returns><c>true</c> if the filter is supported, <c>false</c> otherwise.</returns>
+        bool SupportsFilter(string filter);
+
+        /// <summary>
+        /// Whether filter is supported with the given option.
+        /// </summary>
+        /// <param name="option">The option.</param>
+        /// <returns><c>true</c> if the filter is supported, <c>false</c> otherwise.</returns>
+        bool SupportsFilterWithOption(FilterOptionType option);
+
+        /// <summary>
+        /// Whether the bitstream filter is supported with the given option.
+        /// </summary>
+        /// <param name="option">The option.</param>
+        /// <returns><c>true</c> if the bitstream filter is supported, <c>false</c> otherwise.</returns>
+        bool SupportsBitStreamFilterWithOption(BitStreamFilterOptionType option);
+
+        /// <summary>
+        /// Extracts the audio image.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        /// <param name="imageStreamIndex">Index of the image stream.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{Stream}.</returns>
+        Task<string> ExtractAudioImage(string path, int? imageStreamIndex, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Extracts the video image.
+        /// </summary>
+        /// <param name="inputFile">Input file.</param>
+        /// <param name="container">Video container type.</param>
+        /// <param name="mediaSource">Media source information.</param>
+        /// <param name="videoStream">Media stream information.</param>
+        /// <param name="threedFormat">Video 3D format.</param>
+        /// <param name="offset">Time offset.</param>
+        /// <param name="cancellationToken">CancellationToken to use for operation.</param>
+        /// <returns>Location of video image.</returns>
+        Task<string> ExtractVideoImage(string inputFile, string container, MediaSourceInfo mediaSource, MediaStream videoStream, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Extracts the video image.
+        /// </summary>
+        /// <param name="inputFile">Input file.</param>
+        /// <param name="container">Video container type.</param>
+        /// <param name="mediaSource">Media source information.</param>
+        /// <param name="imageStream">Media stream information.</param>
+        /// <param name="imageStreamIndex">Index of the stream to extract from.</param>
+        /// <param name="targetFormat">The format of the file to write.</param>
+        /// <param name="cancellationToken">CancellationToken to use for operation.</param>
+        /// <returns>Location of video image.</returns>
+        Task<string> ExtractVideoImage(string inputFile, string container, MediaSourceInfo mediaSource, MediaStream imageStream, int? imageStreamIndex, ImageFormat? targetFormat, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Extracts the video images on interval.
+        /// </summary>
+        /// <param name="inputFile">Input file.</param>
+        /// <param name="container">Video container type.</param>
+        /// <param name="mediaSource">Media source information.</param>
+        /// <param name="imageStream">Media stream information.</param>
+        /// <param name="maxWidth">The maximum width.</param>
+        /// <param name="interval">The interval.</param>
+        /// <param name="allowHwAccel">Allow for hardware acceleration.</param>
+        /// <param name="enableHwEncoding">Use hardware mjpeg encoder.</param>
+        /// <param name="threads">The input/output thread count for ffmpeg.</param>
+        /// <param name="qualityScale">The qscale value for ffmpeg.</param>
+        /// <param name="priority">The process priority for the ffmpeg process.</param>
+        /// <param name="enableKeyFrameOnlyExtraction">Whether to only extract key frames.</param>
+        /// <param name="encodingHelper">EncodingHelper instance.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Directory where images where extracted. A given image made before another will always be named with a lower number.</returns>
+        Task<string> ExtractVideoImagesOnIntervalAccelerated(
+            string inputFile,
+            string container,
+            MediaSourceInfo mediaSource,
+            MediaStream imageStream,
+            int maxWidth,
+            TimeSpan interval,
+            bool allowHwAccel,
+            bool enableHwEncoding,
+            int? threads,
+            int? qualityScale,
+            ProcessPriorityClass? priority,
+            bool enableKeyFrameOnlyExtraction,
+            EncodingHelper encodingHelper,
+            CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the media info.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task<MediaInfo> GetMediaInfo(MediaInfoRequest request, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the input argument.
+        /// </summary>
+        /// <param name="inputFile">The input file.</param>
+        /// <param name="mediaSource">The mediaSource.</param>
+        /// <returns>System.String.</returns>
+        string GetInputArgument(string inputFile, MediaSourceInfo mediaSource);
+
+        /// <summary>
+        /// Gets the input argument.
+        /// </summary>
+        /// <param name="inputFiles">The input files.</param>
+        /// <param name="mediaSource">The mediaSource.</param>
+        /// <returns>System.String.</returns>
+        string GetInputArgument(IReadOnlyList<string> inputFiles, MediaSourceInfo mediaSource);
+
+        /// <summary>
+        /// Gets the input argument for an external subtitle file.
+        /// </summary>
+        /// <param name="inputFile">The input file.</param>
+        /// <returns>System.String.</returns>
+        string GetExternalSubtitleInputArgument(string inputFile);
+
+        /// <summary>
+        /// Gets the time parameter.
+        /// </summary>
+        /// <param name="ticks">The ticks.</param>
+        /// <returns>System.String.</returns>
+        string GetTimeParameter(long ticks);
+
+        Task ConvertImage(string inputPath, string outputPath);
+
+        /// <summary>
+        /// Escapes the subtitle filter path.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        /// <returns>System.String.</returns>
+        string EscapeSubtitleFilterPath(string path);
+
+        /// <summary>
+        /// Sets the path to find FFmpeg.
+        /// </summary>
+        /// <returns>bool indicates whether a valid ffmpeg is found.</returns>
+        bool SetFFmpegPath();
+
+        /// <summary>
+        /// Gets the primary playlist of .vob files.
+        /// </summary>
+        /// <param name="path">The to the .vob files.</param>
+        /// <param name="titleNumber">The title number to start with.</param>
+        /// <returns>A playlist.</returns>
+        IReadOnlyList<string> GetPrimaryPlaylistVobFiles(string path, uint? titleNumber);
+
+        /// <summary>
+        /// Gets the primary playlist of .m2ts files.
+        /// </summary>
+        /// <param name="path">The to the .m2ts files.</param>
+        /// <returns>A playlist.</returns>
+        IReadOnlyList<string> GetPrimaryPlaylistM2tsFiles(string path);
+
+        /// <summary>
+        /// Gets the input path argument from <see cref="EncodingJobInfo"/>.
+        /// </summary>
+        /// <param name="state">The <see cref="EncodingJobInfo"/>.</param>
+        /// <returns>The input path argument.</returns>
+        string GetInputPathArgument(EncodingJobInfo state);
+
+        /// <summary>
+        /// Gets the input path argument.
+        /// </summary>
+        /// <param name="path">The item path.</param>
+        /// <param name="mediaSource">The <see cref="MediaSourceInfo"/>.</param>
+        /// <returns>The input path argument.</returns>
+        string GetInputPathArgument(string path, MediaSourceInfo mediaSource);
+
+        /// <summary>
+        /// Generates a FFmpeg concat config for the source.
+        /// </summary>
+        /// <param name="source">The <see cref="MediaSourceInfo"/>.</param>
+        /// <param name="concatFilePath">The path the config should be written to.</param>
+        void GenerateConcatConfig(MediaSourceInfo source, string concatFilePath);
+    }
+}

MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs

@@ -0,0 +1,65 @@
+#nullable disable
+
+#pragma warning disable CS1591
+
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public interface ISubtitleEncoder
+    {
+        /// <summary>
+        /// Gets the subtitles.
+        /// </summary>
+        /// <param name="item">Item to use.</param>
+        /// <param name="mediaSourceId">Media source.</param>
+        /// <param name="subtitleStreamIndex">Subtitle stream to use.</param>
+        /// <param name="outputFormat">Output format to use.</param>
+        /// <param name="startTimeTicks">Start time.</param>
+        /// <param name="endTimeTicks">End time.</param>
+        /// <param name="preserveOriginalTimestamps">Option to preserve original timestamps.</param>
+        /// <param name="cancellationToken">The cancellation token for the operation.</param>
+        /// <returns>Task{Stream}.</returns>
+        Task<Stream> GetSubtitles(
+            BaseItem item,
+            string mediaSourceId,
+            int subtitleStreamIndex,
+            string outputFormat,
+            long startTimeTicks,
+            long endTimeTicks,
+            bool preserveOriginalTimestamps,
+            CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the subtitle language encoding parameter.
+        /// </summary>
+        /// <param name="subtitleStream">The subtitle stream.</param>
+        /// <param name="language">The language.</param>
+        /// <param name="mediaSource">The media source.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>System.String.</returns>
+        Task<string> GetSubtitleFileCharacterSet(MediaStream subtitleStream, string language, MediaSourceInfo mediaSource, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the path to a subtitle file.
+        /// </summary>
+        /// <param name="subtitleStream">The subtitle stream.</param>
+        /// <param name="mediaSource">The media source.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>System.String.</returns>
+        Task<string> GetSubtitleFilePath(MediaStream subtitleStream, MediaSourceInfo mediaSource, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Extracts all extractable subtitles (text and pgs).
+        /// </summary>
+        /// <param name="mediaSource">The mediaSource.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task ExtractAllExtractableSubtitles(MediaSourceInfo mediaSource, CancellationToken cancellationToken);
+    }
+}

MediaBrowser.Controller/MediaEncoding/ITranscodeManager.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Streaming;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// A service for managing media transcoding.
+/// </summary>
+public interface ITranscodeManager
+{
+    /// <summary>
+    /// Get transcoding job.
+    /// </summary>
+    /// <param name="playSessionId">Playback session id.</param>
+    /// <returns>The transcoding job.</returns>
+    public TranscodingJob? GetTranscodingJob(string playSessionId);
+
+    /// <summary>
+    /// Get transcoding job.
+    /// </summary>
+    /// <param name="path">Path to the transcoding file.</param>
+    /// <param name="type">The <see cref="TranscodingJobType"/>.</param>
+    /// <returns>The transcoding job.</returns>
+    public TranscodingJob? GetTranscodingJob(string path, TranscodingJobType type);
+
+    /// <summary>
+    /// Ping transcoding job.
+    /// </summary>
+    /// <param name="playSessionId">Play session id.</param>
+    /// <param name="isUserPaused">Is user paused.</param>
+    /// <exception cref="ArgumentNullException">Play session id is null.</exception>
+    public void PingTranscodingJob(string playSessionId, bool? isUserPaused);
+
+    /// <summary>
+    /// Kills the single transcoding job.
+    /// </summary>
+    /// <param name="deviceId">The device id.</param>
+    /// <param name="playSessionId">The play session identifier.</param>
+    /// <param name="deleteFiles">The delete files.</param>
+    /// <returns>Task.</returns>
+    public Task KillTranscodingJobs(string deviceId, string? playSessionId, Func<string, bool> deleteFiles);
+
+    /// <summary>
+    /// Report the transcoding progress to the session manager.
+    /// </summary>
+    /// <param name="job">The <see cref="TranscodingJob"/> of which the progress will be reported.</param>
+    /// <param name="state">The <see cref="StreamState"/> of the current transcoding job.</param>
+    /// <param name="transcodingPosition">The current transcoding position.</param>
+    /// <param name="framerate">The framerate of the transcoding job.</param>
+    /// <param name="percentComplete">The completion percentage of the transcode.</param>
+    /// <param name="bytesTranscoded">The number of bytes transcoded.</param>
+    /// <param name="bitRate">The bitrate of the transcoding job.</param>
+    public void ReportTranscodingProgress(
+        TranscodingJob job,
+        StreamState state,
+        TimeSpan? transcodingPosition,
+        float? framerate,
+        double? percentComplete,
+        long? bytesTranscoded,
+        int? bitRate);
+
+    /// <summary>
+    /// Starts FFMpeg.
+    /// </summary>
+    /// <param name="state">The state.</param>
+    /// <param name="outputPath">The output path.</param>
+    /// <param name="commandLineArguments">The command line arguments for FFmpeg.</param>
+    /// <param name="userId">The user id.</param>
+    /// <param name="transcodingJobType">The <see cref="TranscodingJobType"/>.</param>
+    /// <param name="cancellationTokenSource">The cancellation token source.</param>
+    /// <param name="workingDirectory">The working directory.</param>
+    /// <returns>Task.</returns>
+    public Task<TranscodingJob> StartFfMpeg(
+        StreamState state,
+        string outputPath,
+        string commandLineArguments,
+        Guid userId,
+        TranscodingJobType transcodingJobType,
+        CancellationTokenSource cancellationTokenSource,
+        string? workingDirectory = null);
+
+    /// <summary>
+    /// Called when [transcode begin request].
+    /// </summary>
+    /// <param name="path">The path.</param>
+    /// <param name="type">The type.</param>
+    /// <returns>The <see cref="TranscodingJob"/>.</returns>
+    public TranscodingJob? OnTranscodeBeginRequest(string path, TranscodingJobType type);
+
+    /// <summary>
+    /// Called when [transcode end].
+    /// </summary>
+    /// <param name="job">The transcode job.</param>
+    public void OnTranscodeEndRequest(TranscodingJob job);
+
+    /// <summary>
+    /// Transcoding lock.
+    /// </summary>
+    /// <param name="outputPath">The output path of the transcoded file.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>An <see cref="IDisposable"/>.</returns>
+    ValueTask<IDisposable> LockAsync(string outputPath, CancellationToken cancellationToken);
+}

MediaBrowser.Controller/MediaEncoding/JobLogger.cs

@@ -0,0 +1,163 @@
+#nullable disable
+
+#pragma warning disable CS1591
+
+using System;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public class JobLogger
+    {
+        private readonly ILogger _logger;
+
+        public JobLogger(ILogger logger)
+        {
+            _logger = logger;
+        }
+
+        public async Task StartStreamingLog(EncodingJobInfo state, StreamReader reader, Stream target)
+        {
+            try
+            {
+                using (target)
+                using (reader)
+                {
+                    string line = await reader.ReadLineAsync().ConfigureAwait(false);
+                    while (line is not null && reader.BaseStream.CanRead)
+                    {
+                        ParseLogLine(line, state);
+
+                        var bytes = Encoding.UTF8.GetBytes(Environment.NewLine + line);
+
+                        // If ffmpeg process is closed, the state is disposed, so don't write to target in that case
+                        if (!target.CanWrite)
+                        {
+                            break;
+                        }
+
+                        await target.WriteAsync(bytes).ConfigureAwait(false);
+
+                        // Check again, the stream could have been closed
+                        if (!target.CanWrite)
+                        {
+                            break;
+                        }
+
+                        await target.FlushAsync().ConfigureAwait(false);
+                        line = await reader.ReadLineAsync().ConfigureAwait(false);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error reading ffmpeg log");
+            }
+        }
+
+        private void ParseLogLine(string line, EncodingJobInfo state)
+        {
+            float? framerate = null;
+            double? percent = null;
+            TimeSpan? transcodingPosition = null;
+            long? bytesTranscoded = null;
+            int? bitRate = null;
+
+            var parts = line.Split(' ');
+
+            var totalMs = state.RunTimeTicks.HasValue
+                ? TimeSpan.FromTicks(state.RunTimeTicks.Value).TotalMilliseconds
+                : 0;
+
+            var startMs = state.BaseRequest.StartTimeTicks.HasValue
+                ? TimeSpan.FromTicks(state.BaseRequest.StartTimeTicks.Value).TotalMilliseconds
+                : 0;
+
+            for (var i = 0; i < parts.Length; i++)
+            {
+                var part = parts[i];
+
+                if (string.Equals(part, "fps=", StringComparison.OrdinalIgnoreCase) &&
+                    (i + 1 < parts.Length))
+                {
+                    var rate = parts[i + 1];
+
+                    if (float.TryParse(rate, CultureInfo.InvariantCulture, out var val))
+                    {
+                        framerate = val;
+                    }
+                }
+                else if (part.StartsWith("fps=", StringComparison.OrdinalIgnoreCase))
+                {
+                    var rate = part.Split('=', 2)[^1];
+
+                    if (float.TryParse(rate, CultureInfo.InvariantCulture, out var val))
+                    {
+                        framerate = val;
+                    }
+                }
+                else if (state.RunTimeTicks.HasValue &&
+                    part.StartsWith("time=", StringComparison.OrdinalIgnoreCase))
+                {
+                    var time = part.Split('=', 2)[^1];
+
+                    if (TimeSpan.TryParse(time, CultureInfo.InvariantCulture, out var val))
+                    {
+                        var currentMs = startMs + val.TotalMilliseconds;
+
+                        percent = 100.0 * currentMs / totalMs;
+
+                        transcodingPosition = TimeSpan.FromMilliseconds(currentMs);
+                    }
+                }
+                else if (part.StartsWith("size=", StringComparison.OrdinalIgnoreCase))
+                {
+                    var size = part.Split('=', 2)[^1];
+
+                    int? scale = null;
+                    if (size.Contains("kb", StringComparison.OrdinalIgnoreCase))
+                    {
+                        scale = 1024;
+                        size = size.Replace("kb", string.Empty, StringComparison.OrdinalIgnoreCase);
+                    }
+
+                    if (scale.HasValue)
+                    {
+                        if (long.TryParse(size, CultureInfo.InvariantCulture, out var val))
+                        {
+                            bytesTranscoded = val * scale.Value;
+                        }
+                    }
+                }
+                else if (part.StartsWith("bitrate=", StringComparison.OrdinalIgnoreCase))
+                {
+                    var rate = part.Split('=', 2)[^1];
+
+                    int? scale = null;
+                    if (rate.Contains("kbits/s", StringComparison.OrdinalIgnoreCase))
+                    {
+                        scale = 1024;
+                        rate = rate.Replace("kbits/s", string.Empty, StringComparison.OrdinalIgnoreCase);
+                    }
+
+                    if (scale.HasValue)
+                    {
+                        if (float.TryParse(rate, CultureInfo.InvariantCulture, out var val))
+                        {
+                            bitRate = (int)Math.Ceiling(val * scale.Value);
+                        }
+                    }
+                }
+            }
+
+            if (framerate.HasValue || percent.HasValue)
+            {
+                state.ReportTranscodingProgress(transcodingPosition, framerate, percent, bytesTranscoded, bitRate);
+            }
+        }
+    }
+}

MediaBrowser.Controller/MediaEncoding/MediaInfoRequest.cs

@@ -0,0 +1,18 @@
+#nullable disable
+
+#pragma warning disable CS1591
+
+using MediaBrowser.Model.Dlna;
+using MediaBrowser.Model.Dto;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public class MediaInfoRequest
+    {
+        public MediaSourceInfo MediaSource { get; set; }
+
+        public bool ExtractChapters { get; set; }
+
+        public DlnaProfileType MediaType { get; set; }
+    }
+}

MediaBrowser.Controller/MediaEncoding/TranscodingJob.cs

@@ -0,0 +1,288 @@
+using System;
+using System.Diagnostics;
+using System.Threading;
+using MediaBrowser.Model.Dto;
+using Microsoft.Extensions.Logging;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// Class TranscodingJob.
+/// </summary>
+public sealed class TranscodingJob : IDisposable
+{
+    private readonly ILogger<TranscodingJob> _logger;
+    private readonly Lock _processLock = new();
+    private readonly Lock _timerLock = new();
+
+    private Timer? _killTimer;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TranscodingJob"/> class.
+    /// </summary>
+    /// <param name="logger">Instance of the <see cref="ILogger{TranscodingJobDto}"/> interface.</param>
+    public TranscodingJob(ILogger<TranscodingJob> logger)
+    {
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// Gets or sets the play session identifier.
+    /// </summary>
+    public string? PlaySessionId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the live stream identifier.
+    /// </summary>
+    public string? LiveStreamId { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether is live output.
+    /// </summary>
+    public bool IsLiveOutput { get; set; }
+
+    /// <summary>
+    /// Gets or sets the path.
+    /// </summary>
+    public MediaSourceInfo? MediaSource { get; set; }
+
+    /// <summary>
+    /// Gets or sets path.
+    /// </summary>
+    public string? Path { get; set; }
+
+    /// <summary>
+    /// Gets or sets the type.
+    /// </summary>
+    public TranscodingJobType Type { get; set; }
+
+    /// <summary>
+    /// Gets or sets the process.
+    /// </summary>
+    public Process? Process { get; set; }
+
+    /// <summary>
+    /// Gets or sets the active request count.
+    /// </summary>
+    public int ActiveRequestCount { get; set; }
+
+    /// <summary>
+    /// Gets or sets device id.
+    /// </summary>
+    public string? DeviceId { get; set; }
+
+    /// <summary>
+    /// Gets or sets cancellation token source.
+    /// </summary>
+    public CancellationTokenSource? CancellationTokenSource { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether has exited.
+    /// </summary>
+    public bool HasExited { get; set; }
+
+    /// <summary>
+    /// Gets or sets exit code.
+    /// </summary>
+    public int ExitCode { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether is user paused.
+    /// </summary>
+    public bool IsUserPaused { get; set; }
+
+    /// <summary>
+    /// Gets or sets id.
+    /// </summary>
+    public string? Id { get; set; }
+
+    /// <summary>
+    /// Gets or sets framerate.
+    /// </summary>
+    public float? Framerate { get; set; }
+
+    /// <summary>
+    /// Gets or sets completion percentage.
+    /// </summary>
+    public double? CompletionPercentage { get; set; }
+
+    /// <summary>
+    /// Gets or sets bytes downloaded.
+    /// </summary>
+    public long BytesDownloaded { get; set; }
+
+    /// <summary>
+    /// Gets or sets bytes transcoded.
+    /// </summary>
+    public long? BytesTranscoded { get; set; }
+
+    /// <summary>
+    /// Gets or sets bit rate.
+    /// </summary>
+    public int? BitRate { get; set; }
+
+    /// <summary>
+    /// Gets or sets transcoding position ticks.
+    /// </summary>
+    public long? TranscodingPositionTicks { get; set; }
+
+    /// <summary>
+    /// Gets or sets download position ticks.
+    /// </summary>
+    public long? DownloadPositionTicks { get; set; }
+
+    /// <summary>
+    /// Gets or sets transcoding throttler.
+    /// </summary>
+    public TranscodingThrottler? TranscodingThrottler { get; set; }
+
+    /// <summary>
+    /// Gets or sets transcoding segment cleaner.
+    /// </summary>
+    public TranscodingSegmentCleaner? TranscodingSegmentCleaner { get; set; }
+
+    /// <summary>
+    /// Gets or sets last ping date.
+    /// </summary>
+    public DateTime LastPingDate { get; set; }
+
+    /// <summary>
+    /// Gets or sets ping timeout.
+    /// </summary>
+    public int PingTimeout { get; set; }
+
+    /// <summary>
+    /// Stop kill timer.
+    /// </summary>
+    public void StopKillTimer()
+    {
+        lock (_timerLock)
+        {
+            _killTimer?.Change(Timeout.Infinite, Timeout.Infinite);
+        }
+    }
+
+    /// <summary>
+    /// Dispose kill timer.
+    /// </summary>
+    public void DisposeKillTimer()
+    {
+        lock (_timerLock)
+        {
+            if (_killTimer is not null)
+            {
+                _killTimer.Dispose();
+                _killTimer = null;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Start kill timer.
+    /// </summary>
+    /// <param name="callback">Callback action.</param>
+    public void StartKillTimer(Action<object?> callback)
+    {
+        StartKillTimer(callback, PingTimeout);
+    }
+
+    /// <summary>
+    /// Start kill timer.
+    /// </summary>
+    /// <param name="callback">Callback action.</param>
+    /// <param name="intervalMs">Callback interval.</param>
+    public void StartKillTimer(Action<object?> callback, int intervalMs)
+    {
+        if (HasExited)
+        {
+            return;
+        }
+
+        lock (_timerLock)
+        {
+            if (_killTimer is null)
+            {
+                _logger.LogDebug("Starting kill timer at {0}ms. JobId {1} PlaySessionId {2}", intervalMs, Id, PlaySessionId);
+                _killTimer = new Timer(new TimerCallback(callback), this, intervalMs, Timeout.Infinite);
+            }
+            else
+            {
+                _logger.LogDebug("Changing kill timer to {0}ms. JobId {1} PlaySessionId {2}", intervalMs, Id, PlaySessionId);
+                _killTimer.Change(intervalMs, Timeout.Infinite);
+            }
+        }
+    }
+
+    /// <summary>
+    /// Change kill timer if started.
+    /// </summary>
+    public void ChangeKillTimerIfStarted()
+    {
+        if (HasExited)
+        {
+            return;
+        }
+
+        lock (_timerLock)
+        {
+            if (_killTimer is not null)
+            {
+                var intervalMs = PingTimeout;
+
+                _logger.LogDebug("Changing kill timer to {0}ms. JobId {1} PlaySessionId {2}", intervalMs, Id, PlaySessionId);
+                _killTimer.Change(intervalMs, Timeout.Infinite);
+            }
+        }
+    }
+
+    /// <summary>
+    /// Stops the transcoding job.
+    /// </summary>
+    public void Stop()
+    {
+        lock (_processLock)
+        {
+#pragma warning disable CA1849 // Can't await in lock block
+            TranscodingThrottler?.Stop().GetAwaiter().GetResult();
+            TranscodingSegmentCleaner?.Stop();
+
+            var process = Process;
+
+            if (!HasExited)
+            {
+                try
+                {
+                    _logger.LogInformation("Stopping ffmpeg process with q command for {Path}", Path);
+
+                    process!.StandardInput.WriteLine("q");
+
+                    // Need to wait because killing is asynchronous.
+                    if (!process.WaitForExit(5000))
+                    {
+                        _logger.LogInformation("Killing FFmpeg process for {Path}", Path);
+                        process.Kill();
+                    }
+                }
+                catch (InvalidOperationException)
+                {
+                }
+            }
+#pragma warning restore CA1849
+        }
+    }
+
+    /// <inheritdoc />
+    public void Dispose()
+    {
+        Process?.Dispose();
+        Process = null;
+        _killTimer?.Dispose();
+        _killTimer = null;
+        CancellationTokenSource?.Dispose();
+        CancellationTokenSource = null;
+        TranscodingThrottler?.Dispose();
+        TranscodingThrottler = null;
+        TranscodingSegmentCleaner?.Dispose();
+        TranscodingSegmentCleaner = null;
+    }
+}

MediaBrowser.Controller/MediaEncoding/TranscodingJobType.cs

@@ -0,0 +1,23 @@
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Enum TranscodingJobType.
+    /// </summary>
+    public enum TranscodingJobType
+    {
+        /// <summary>
+        /// The progressive.
+        /// </summary>
+        Progressive,
+
+        /// <summary>
+        /// The HLS.
+        /// </summary>
+        Hls,
+
+        /// <summary>
+        /// The dash.
+        /// </summary>
+        Dash
+    }
+}

MediaBrowser.Controller/MediaEncoding/TranscodingSegmentCleaner.cs

@@ -0,0 +1,178 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Model.Configuration;
+using MediaBrowser.Model.IO;
+using Microsoft.Extensions.Logging;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// Transcoding segment cleaner.
+/// </summary>
+public class TranscodingSegmentCleaner : IDisposable
+{
+    private readonly TranscodingJob _job;
+    private readonly ILogger<TranscodingSegmentCleaner> _logger;
+    private readonly IConfigurationManager _config;
+    private readonly IFileSystem _fileSystem;
+    private readonly IMediaEncoder _mediaEncoder;
+    private Timer? _timer;
+    private int _segmentLength;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TranscodingSegmentCleaner"/> class.
+    /// </summary>
+    /// <param name="job">Transcoding job dto.</param>
+    /// <param name="logger">Instance of the <see cref="ILogger{TranscodingSegmentCleaner}"/> interface.</param>
+    /// <param name="config">Instance of the <see cref="IConfigurationManager"/> interface.</param>
+    /// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
+    /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
+    /// <param name="segmentLength">The segment length of this transcoding job.</param>
+    public TranscodingSegmentCleaner(TranscodingJob job, ILogger<TranscodingSegmentCleaner> logger, IConfigurationManager config, IFileSystem fileSystem, IMediaEncoder mediaEncoder, int segmentLength)
+    {
+        _job = job;
+        _logger = logger;
+        _config = config;
+        _fileSystem = fileSystem;
+        _mediaEncoder = mediaEncoder;
+        _segmentLength = segmentLength;
+    }
+
+    /// <summary>
+    /// Start timer.
+    /// </summary>
+    public void Start()
+    {
+        _timer = new Timer(TimerCallback, null, 20000, 20000);
+    }
+
+    /// <summary>
+    /// Stop cleaner.
+    /// </summary>
+    public void Stop()
+    {
+        DisposeTimer();
+    }
+
+    /// <summary>
+    /// Dispose cleaner.
+    /// </summary>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    /// <summary>
+    /// Dispose cleaner.
+    /// </summary>
+    /// <param name="disposing">Disposing.</param>
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            DisposeTimer();
+        }
+    }
+
+    private EncodingOptions GetOptions()
+    {
+        return _config.GetEncodingOptions();
+    }
+
+    private async void TimerCallback(object? state)
+    {
+        if (_job.HasExited)
+        {
+            DisposeTimer();
+            return;
+        }
+
+        var options = GetOptions();
+        var enableSegmentDeletion = options.EnableSegmentDeletion;
+        var segmentKeepSeconds = Math.Max(options.SegmentKeepSeconds, 20);
+
+        if (enableSegmentDeletion)
+        {
+            var downloadPositionTicks = _job.DownloadPositionTicks ?? 0;
+            var downloadPositionSeconds = Convert.ToInt64(TimeSpan.FromTicks(downloadPositionTicks).TotalSeconds);
+
+            if (downloadPositionSeconds > 0 && segmentKeepSeconds > 0 && downloadPositionSeconds > segmentKeepSeconds)
+            {
+                var idxMaxToDelete = (downloadPositionSeconds - segmentKeepSeconds) / _segmentLength;
+
+                if (idxMaxToDelete > 0)
+                {
+                    await DeleteSegmentFiles(_job, 0, idxMaxToDelete, 1500).ConfigureAwait(false);
+                }
+            }
+        }
+    }
+
+    private async Task DeleteSegmentFiles(TranscodingJob job, long idxMin, long idxMax, int delayMs)
+    {
+        var path = job.Path ?? throw new ArgumentException("Path can't be null.");
+
+        _logger.LogDebug("Deleting segment file(s) index {Min} to {Max} from {Path}", idxMin, idxMax, path);
+
+        await Task.Delay(delayMs).ConfigureAwait(false);
+
+        try
+        {
+            if (job.Type == TranscodingJobType.Hls)
+            {
+                DeleteHlsSegmentFiles(path, idxMin, idxMax);
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogDebug(ex, "Error deleting segment file(s) {Path}", path);
+        }
+    }
+
+    private void DeleteHlsSegmentFiles(string outputFilePath, long idxMin, long idxMax)
+    {
+        var directory = Path.GetDirectoryName(outputFilePath)
+                        ?? throw new ArgumentException("Path can't be a root directory.", nameof(outputFilePath));
+
+        var name = Path.GetFileNameWithoutExtension(outputFilePath);
+
+        var filesToDelete = _fileSystem.GetFilePaths(directory)
+            .Where(f => long.TryParse(Path.GetFileNameWithoutExtension(f).Replace(name, string.Empty, StringComparison.Ordinal), out var idx)
+                        && (idx >= idxMin && idx <= idxMax));
+
+        List<Exception>? exs = null;
+        foreach (var file in filesToDelete)
+        {
+            try
+            {
+                _logger.LogDebug("Deleting HLS segment file {0}", file);
+                _fileSystem.DeleteFile(file);
+            }
+            catch (IOException ex)
+            {
+                (exs ??= new List<Exception>()).Add(ex);
+                _logger.LogDebug(ex, "Error deleting HLS segment file {Path}", file);
+            }
+        }
+
+        if (exs is not null)
+        {
+            throw new AggregateException("Error deleting HLS segment files", exs);
+        }
+    }
+
+    private void DisposeTimer()
+    {
+        if (_timer is not null)
+        {
+            _timer.Dispose();
+            _timer = null;
+        }
+    }
+}

MediaBrowser.Controller/MediaEncoding/TranscodingThrottler.cs

@@ -0,0 +1,218 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Model.Configuration;
+using MediaBrowser.Model.IO;
+using Microsoft.Extensions.Logging;
+
+namespace MediaBrowser.Controller.MediaEncoding;
+
+/// <summary>
+/// Transcoding throttler.
+/// </summary>
+public class TranscodingThrottler : IDisposable
+{
+    private readonly TranscodingJob _job;
+    private readonly ILogger<TranscodingThrottler> _logger;
+    private readonly IConfigurationManager _config;
+    private readonly IFileSystem _fileSystem;
+    private readonly IMediaEncoder _mediaEncoder;
+    private Timer? _timer;
+    private bool _isPaused;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TranscodingThrottler"/> class.
+    /// </summary>
+    /// <param name="job">Transcoding job dto.</param>
+    /// <param name="logger">Instance of the <see cref="ILogger{TranscodingThrottler}"/> interface.</param>
+    /// <param name="config">Instance of the <see cref="IConfigurationManager"/> interface.</param>
+    /// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
+    /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
+    public TranscodingThrottler(TranscodingJob job, ILogger<TranscodingThrottler> logger, IConfigurationManager config, IFileSystem fileSystem, IMediaEncoder mediaEncoder)
+    {
+        _job = job;
+        _logger = logger;
+        _config = config;
+        _fileSystem = fileSystem;
+        _mediaEncoder = mediaEncoder;
+    }
+
+    /// <summary>
+    /// Start timer.
+    /// </summary>
+    public void Start()
+    {
+        _timer = new Timer(TimerCallback, null, 5000, 5000);
+    }
+
+    /// <summary>
+    /// Unpause transcoding.
+    /// </summary>
+    /// <returns>A <see cref="Task"/>.</returns>
+    public async Task UnpauseTranscoding()
+    {
+        if (_isPaused)
+        {
+            _logger.LogDebug("Sending resume command to ffmpeg");
+
+            try
+            {
+                var resumeKey = _mediaEncoder.IsPkeyPauseSupported ? "u" : Environment.NewLine;
+                await _job.Process!.StandardInput.WriteAsync(resumeKey).ConfigureAwait(false);
+                _isPaused = false;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error resuming transcoding");
+            }
+        }
+    }
+
+    /// <summary>
+    /// Stop throttler.
+    /// </summary>
+    /// <returns>A <see cref="Task"/>.</returns>
+    public async Task Stop()
+    {
+        DisposeTimer();
+        await UnpauseTranscoding().ConfigureAwait(false);
+    }
+
+    /// <summary>
+    /// Dispose throttler.
+    /// </summary>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    /// <summary>
+    /// Dispose throttler.
+    /// </summary>
+    /// <param name="disposing">Disposing.</param>
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            DisposeTimer();
+        }
+    }
+
+    private EncodingOptions GetOptions()
+    {
+        return _config.GetEncodingOptions();
+    }
+
+    private async void TimerCallback(object? state)
+    {
+        if (_job.HasExited)
+        {
+            DisposeTimer();
+            return;
+        }
+
+        var options = GetOptions();
+
+        if (options.EnableThrottling && IsThrottleAllowed(_job, Math.Max(options.ThrottleDelaySeconds, 60)))
+        {
+            await PauseTranscoding().ConfigureAwait(false);
+        }
+        else
+        {
+            await UnpauseTranscoding().ConfigureAwait(false);
+        }
+    }
+
+    private async Task PauseTranscoding()
+    {
+        if (!_isPaused)
+        {
+            var pauseKey = _mediaEncoder.IsPkeyPauseSupported ? "p" : "c";
+
+            _logger.LogDebug("Sending pause command [{Key}] to ffmpeg", pauseKey);
+
+            try
+            {
+                await _job.Process!.StandardInput.WriteAsync(pauseKey).ConfigureAwait(false);
+                _isPaused = true;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error pausing transcoding");
+            }
+        }
+    }
+
+    private bool IsThrottleAllowed(TranscodingJob job, int thresholdSeconds)
+    {
+        var bytesDownloaded = job.BytesDownloaded;
+        var transcodingPositionTicks = job.TranscodingPositionTicks ?? 0;
+        var downloadPositionTicks = job.DownloadPositionTicks ?? 0;
+
+        var path = job.Path ?? throw new ArgumentException("Path can't be null.");
+
+        var gapLengthInTicks = TimeSpan.FromSeconds(thresholdSeconds).Ticks;
+
+        if (downloadPositionTicks > 0 && transcodingPositionTicks > 0)
+        {
+            // HLS - time-based consideration
+
+            var targetGap = gapLengthInTicks;
+            var gap = transcodingPositionTicks - downloadPositionTicks;
+
+            if (gap < targetGap)
+            {
+                _logger.LogDebug("Not throttling transcoder gap {0} target gap {1}", gap, targetGap);
+                return false;
+            }
+
+            _logger.LogDebug("Throttling transcoder gap {0} target gap {1}", gap, targetGap);
+            return true;
+        }
+
+        if (bytesDownloaded > 0 && transcodingPositionTicks > 0)
+        {
+            // Progressive Streaming - byte-based consideration
+
+            try
+            {
+                var bytesTranscoded = job.BytesTranscoded ?? _fileSystem.GetFileInfo(path).Length;
+
+                // Estimate the bytes the transcoder should be ahead
+                double gapFactor = gapLengthInTicks;
+                gapFactor /= transcodingPositionTicks;
+                var targetGap = bytesTranscoded * gapFactor;
+
+                var gap = bytesTranscoded - bytesDownloaded;
+
+                if (gap < targetGap)
+                {
+                    _logger.LogDebug("Not throttling transcoder gap {0} target gap {1} bytes downloaded {2}", gap, targetGap, bytesDownloaded);
+                    return false;
+                }
+
+                _logger.LogDebug("Throttling transcoder gap {0} target gap {1} bytes downloaded {2}", gap, targetGap, bytesDownloaded);
+                return true;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error getting output size");
+                return false;
+            }
+        }
+
+        _logger.LogDebug("No throttle data for {Path}", path);
+        return false;
+    }
+
+    private void DisposeTimer()
+    {
+        if (_timer is not null)
+        {
+            _timer.Dispose();
+            _timer = null;
+        }
+    }
+}