using MediaBrowser.Common.Configuration; using MediaBrowser.Controller.Library; using MediaBrowser.Controller.MediaEncoding; using MediaBrowser.Model.Configuration; using MediaBrowser.Model.Dlna; using MediaBrowser.Model.Dto; using MediaBrowser.Model.Entities; using MediaBrowser.Model.Logging; using MediaBrowser.Model.MediaInfo; using System; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Threading; using System.Threading.Tasks; namespace MediaBrowser.MediaEncoding.Encoder { public class EncodingJobFactory { private readonly ILogger _logger; private readonly ILibraryManager _libraryManager; private readonly IMediaSourceManager _mediaSourceManager; private readonly IConfigurationManager _config; protected static readonly CultureInfo UsCulture = new CultureInfo("en-US"); public EncodingJobFactory(ILogger logger, ILibraryManager libraryManager, IMediaSourceManager mediaSourceManager, IConfigurationManager config) { _logger = logger; _libraryManager = libraryManager; _mediaSourceManager = mediaSourceManager; _config = config; } public async Task CreateJob(EncodingJobOptions options, bool isVideoRequest, IProgress progress, CancellationToken cancellationToken) { var request = options; if (string.IsNullOrEmpty(request.AudioCodec)) { request.AudioCodec = InferAudioCodec(request.OutputContainer); } var state = new EncodingJob(_logger, _mediaSourceManager) { Options = options, IsVideoRequest = isVideoRequest, Progress = progress }; if (!string.IsNullOrWhiteSpace(request.AudioCodec)) { state.SupportedAudioCodecs = request.AudioCodec.Split(',').Where(i => !string.IsNullOrWhiteSpace(i)).ToList(); request.AudioCodec = state.SupportedAudioCodecs.FirstOrDefault(); } var item = _libraryManager.GetItemById(request.ItemId); state.ItemType = item.GetType().Name; state.IsInputVideo = string.Equals(item.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase); var mediaSources = await _mediaSourceManager.GetPlayackMediaSources(request.ItemId, null, false, new[] { MediaType.Audio, MediaType.Video }, cancellationToken).ConfigureAwait(false); var mediaSource = string.IsNullOrEmpty(request.MediaSourceId) ? mediaSources.First() : mediaSources.First(i => string.Equals(i.Id, request.MediaSourceId)); AttachMediaStreamInfo(state, mediaSource, options); state.OutputAudioBitrate = GetAudioBitrateParam(request, state.AudioStream); state.OutputAudioSampleRate = request.AudioSampleRate; state.OutputAudioCodec = GetAudioCodec(request); state.OutputAudioChannels = GetNumAudioChannelsParam(request, state.AudioStream, state.OutputAudioCodec); if (isVideoRequest) { state.OutputVideoCodec = GetVideoCodec(request); state.OutputVideoBitrate = GetVideoBitrateParamValue(request, state.VideoStream); if (state.OutputVideoBitrate.HasValue) { var resolution = ResolutionNormalizer.Normalize(state.OutputVideoBitrate.Value, state.OutputVideoCodec, request.MaxWidth, request.MaxHeight); request.MaxWidth = resolution.MaxWidth; request.MaxHeight = resolution.MaxHeight; } } ApplyDeviceProfileSettings(state); TryStreamCopy(state, request); return state; } internal static void TryStreamCopy(EncodingJob state, EncodingJobOptions videoRequest) { if (state.IsVideoRequest) { if (state.VideoStream != null && CanStreamCopyVideo(videoRequest, state.VideoStream)) { state.OutputVideoCodec = "copy"; } if (state.AudioStream != null && CanStreamCopyAudio(videoRequest, state.AudioStream, state.SupportedAudioCodecs)) { state.OutputAudioCodec = "copy"; } } } internal static void AttachMediaStreamInfo(EncodingJob state, MediaSourceInfo mediaSource, EncodingJobOptions videoRequest) { state.MediaPath = mediaSource.Path; state.InputProtocol = mediaSource.Protocol; state.InputContainer = mediaSource.Container; state.InputFileSize = mediaSource.Size; state.InputBitrate = mediaSource.Bitrate; state.RunTimeTicks = mediaSource.RunTimeTicks; state.RemoteHttpHeaders = mediaSource.RequiredHttpHeaders; if (mediaSource.ReadAtNativeFramerate) { state.ReadInputAtNativeFramerate = true; } if (mediaSource.VideoType.HasValue) { state.VideoType = mediaSource.VideoType.Value; } state.IsoType = mediaSource.IsoType; state.PlayableStreamFileNames = mediaSource.PlayableStreamFileNames.ToList(); if (mediaSource.Timestamp.HasValue) { state.InputTimestamp = mediaSource.Timestamp.Value; } state.InputProtocol = mediaSource.Protocol; state.MediaPath = mediaSource.Path; state.RunTimeTicks = mediaSource.RunTimeTicks; state.RemoteHttpHeaders = mediaSource.RequiredHttpHeaders; state.InputBitrate = mediaSource.Bitrate; state.InputFileSize = mediaSource.Size; if (state.ReadInputAtNativeFramerate || mediaSource.Protocol == MediaProtocol.File && string.Equals(mediaSource.Container, "wtv", StringComparison.OrdinalIgnoreCase)) { state.OutputAudioSync = "1000"; state.InputVideoSync = "-1"; state.InputAudioSync = "1"; } var mediaStreams = mediaSource.MediaStreams; if (videoRequest != null) { if (string.IsNullOrEmpty(videoRequest.VideoCodec)) { videoRequest.VideoCodec = InferVideoCodec(videoRequest.OutputContainer); } state.VideoStream = GetMediaStream(mediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video); state.SubtitleStream = GetMediaStream(mediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false); state.AudioStream = GetMediaStream(mediaStreams, videoRequest.AudioStreamIndex, MediaStreamType.Audio); if (state.SubtitleStream != null && !state.SubtitleStream.IsExternal) { state.InternalSubtitleStreamOffset = mediaStreams.Where(i => i.Type == MediaStreamType.Subtitle && !i.IsExternal).ToList().IndexOf(state.SubtitleStream); } if (state.VideoStream != null && state.VideoStream.IsInterlaced) { state.DeInterlace = true; } EnforceResolutionLimit(state, videoRequest); } else { state.AudioStream = GetMediaStream(mediaStreams, null, MediaStreamType.Audio, true); } state.MediaSource = mediaSource; } protected EncodingOptions GetEncodingOptions() { return _config.GetConfiguration("encoding"); } /// /// Infers the video codec. /// /// The container. /// System.Nullable{VideoCodecs}. private static string InferVideoCodec(string container) { if (string.Equals(container, "asf", StringComparison.OrdinalIgnoreCase)) { return "wmv"; } if (string.Equals(container, "webm", StringComparison.OrdinalIgnoreCase)) { return "vpx"; } if (string.Equals(container, "ogg", StringComparison.OrdinalIgnoreCase) || string.Equals(container, "ogv", StringComparison.OrdinalIgnoreCase)) { return "theora"; } if (string.Equals(container, "m3u8", StringComparison.OrdinalIgnoreCase) || string.Equals(container, "ts", StringComparison.OrdinalIgnoreCase)) { return "h264"; } return "copy"; } private string InferAudioCodec(string container) { if (string.Equals(container, "mp3", StringComparison.OrdinalIgnoreCase)) { return "mp3"; } if (string.Equals(container, "aac", StringComparison.OrdinalIgnoreCase)) { return "aac"; } if (string.Equals(container, "wma", StringComparison.OrdinalIgnoreCase)) { return "wma"; } if (string.Equals(container, "ogg", StringComparison.OrdinalIgnoreCase)) { return "vorbis"; } if (string.Equals(container, "oga", StringComparison.OrdinalIgnoreCase)) { return "vorbis"; } if (string.Equals(container, "ogv", StringComparison.OrdinalIgnoreCase)) { return "vorbis"; } if (string.Equals(container, "webm", StringComparison.OrdinalIgnoreCase)) { return "vorbis"; } if (string.Equals(container, "webma", StringComparison.OrdinalIgnoreCase)) { return "vorbis"; } return "copy"; } /// /// Determines which stream will be used for playback /// /// All stream. /// Index of the desired. /// The type. /// if set to true [return first if no index]. /// MediaStream. private static MediaStream GetMediaStream(IEnumerable allStream, int? desiredIndex, MediaStreamType type, bool returnFirstIfNoIndex = true) { var streams = allStream.Where(s => s.Type == type).OrderBy(i => i.Index).ToList(); if (desiredIndex.HasValue) { var stream = streams.FirstOrDefault(s => s.Index == desiredIndex.Value); if (stream != null) { return stream; } } if (type == MediaStreamType.Video) { streams = streams.Where(i => !string.Equals(i.Codec, "mjpeg", StringComparison.OrdinalIgnoreCase)).ToList(); } if (returnFirstIfNoIndex && type == MediaStreamType.Audio) { return streams.FirstOrDefault(i => i.Channels.HasValue && i.Channels.Value > 0) ?? streams.FirstOrDefault(); } // Just return the first one return returnFirstIfNoIndex ? streams.FirstOrDefault() : null; } /// /// Enforces the resolution limit. /// /// The state. /// The video request. private static void EnforceResolutionLimit(EncodingJob state, EncodingJobOptions videoRequest) { // Switch the incoming params to be ceilings rather than fixed values videoRequest.MaxWidth = videoRequest.MaxWidth ?? videoRequest.Width; videoRequest.MaxHeight = videoRequest.MaxHeight ?? videoRequest.Height; videoRequest.Width = null; videoRequest.Height = null; } /// /// Gets the number of audio channels to specify on the command line /// /// The request. /// The audio stream. /// The output audio codec. /// System.Nullable{System.Int32}. private int? GetNumAudioChannelsParam(EncodingJobOptions request, MediaStream audioStream, string outputAudioCodec) { var inputChannels = audioStream == null ? null : audioStream.Channels; if (inputChannels <= 0) { inputChannels = null; } var codec = outputAudioCodec ?? string.Empty; if (codec.IndexOf("wma", StringComparison.OrdinalIgnoreCase) != -1) { // wmav2 currently only supports two channel output return Math.Min(2, inputChannels ?? 2); } if (request.MaxAudioChannels.HasValue) { if (inputChannels.HasValue) { return Math.Min(request.MaxAudioChannels.Value, inputChannels.Value); } var channelLimit = codec.IndexOf("mp3", StringComparison.OrdinalIgnoreCase) != -1 ? 2 : 6; // If we don't have any media info then limit it to 5 to prevent encoding errors due to asking for too many channels return Math.Min(request.MaxAudioChannels.Value, channelLimit); } return request.AudioChannels; } private int? GetVideoBitrateParamValue(EncodingJobOptions request, MediaStream videoStream) { var bitrate = request.VideoBitRate; if (videoStream != null) { var isUpscaling = request.Height.HasValue && videoStream.Height.HasValue && request.Height.Value > videoStream.Height.Value; if (request.Width.HasValue && videoStream.Width.HasValue && request.Width.Value > videoStream.Width.Value) { isUpscaling = true; } // Don't allow bitrate increases unless upscaling if (!isUpscaling) { if (bitrate.HasValue && videoStream.BitRate.HasValue) { bitrate = Math.Min(bitrate.Value, videoStream.BitRate.Value); } } } return bitrate; } protected string GetVideoBitrateParam(EncodingJob state, string videoCodec, bool isHls) { var bitrate = state.OutputVideoBitrate; if (bitrate.HasValue) { var hasFixedResolution = state.Options.HasFixedResolution; if (string.Equals(videoCodec, "libvpx", StringComparison.OrdinalIgnoreCase)) { if (hasFixedResolution) { return string.Format(" -minrate:v ({0}*.90) -maxrate:v ({0}*1.10) -bufsize:v {0} -b:v {0}", bitrate.Value.ToString(UsCulture)); } // With vpx when crf is used, b:v becomes a max rate // https://trac.ffmpeg.org/wiki/vpxEncodingGuide. But higher bitrate source files -b:v causes judder so limite the bitrate but dont allow it to "saturate" the bitrate. So dont contrain it down just up. return string.Format(" -maxrate:v {0} -bufsize:v ({0}*2) -b:v {0}", bitrate.Value.ToString(UsCulture)); } if (string.Equals(videoCodec, "msmpeg4", StringComparison.OrdinalIgnoreCase)) { return string.Format(" -b:v {0}", bitrate.Value.ToString(UsCulture)); } // H264 if (hasFixedResolution) { if (isHls) { return string.Format(" -b:v {0} -maxrate ({0}*.80) -bufsize {0}", bitrate.Value.ToString(UsCulture)); } return string.Format(" -b:v {0}", bitrate.Value.ToString(UsCulture)); } return string.Format(" -maxrate {0} -bufsize {1}", bitrate.Value.ToString(UsCulture), (bitrate.Value * 2).ToString(UsCulture)); } return string.Empty; } private int? GetAudioBitrateParam(EncodingJobOptions request, MediaStream audioStream) { if (request.AudioBitRate.HasValue) { // Make sure we don't request a bitrate higher than the source var currentBitrate = audioStream == null ? request.AudioBitRate.Value : audioStream.BitRate ?? request.AudioBitRate.Value; return request.AudioBitRate.Value; //return Math.Min(currentBitrate, request.AudioBitRate.Value); } return null; } /// /// Determines whether the specified stream is H264. /// /// The stream. /// true if the specified stream is H264; otherwise, false. protected bool IsH264(MediaStream stream) { var codec = stream.Codec ?? string.Empty; return codec.IndexOf("264", StringComparison.OrdinalIgnoreCase) != -1 || codec.IndexOf("avc", StringComparison.OrdinalIgnoreCase) != -1; } /// /// Gets the name of the output audio codec /// /// The request. /// System.String. private string GetAudioCodec(EncodingJobOptions request) { var codec = request.AudioCodec; if (string.Equals(codec, "aac", StringComparison.OrdinalIgnoreCase)) { return "aac -strict experimental"; } if (string.Equals(codec, "mp3", StringComparison.OrdinalIgnoreCase)) { return "libmp3lame"; } if (string.Equals(codec, "vorbis", StringComparison.OrdinalIgnoreCase)) { return "libvorbis"; } if (string.Equals(codec, "wma", StringComparison.OrdinalIgnoreCase)) { return "wmav2"; } return (codec ?? string.Empty).ToLower(); } /// /// Gets the name of the output video codec /// /// The request. /// System.String. private string GetVideoCodec(EncodingJobOptions request) { var codec = request.VideoCodec; if (string.Equals(codec, "h264", StringComparison.OrdinalIgnoreCase)) { return "libx264"; } if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase)) { return "libx265"; } if (string.Equals(codec, "vpx", StringComparison.OrdinalIgnoreCase)) { return "libvpx"; } if (string.Equals(codec, "wmv", StringComparison.OrdinalIgnoreCase)) { return "wmv2"; } if (string.Equals(codec, "theora", StringComparison.OrdinalIgnoreCase)) { return "libtheora"; } return (codec ?? string.Empty).ToLower(); } internal static bool CanStreamCopyVideo(EncodingJobOptions request, MediaStream videoStream) { if (videoStream.IsInterlaced) { return false; } if (videoStream.IsAnamorphic ?? false) { return false; } // Can't stream copy if we're burning in subtitles if (request.SubtitleStreamIndex.HasValue) { if (request.SubtitleMethod == SubtitleDeliveryMethod.Encode) { return false; } } // Source and target codecs must match if (!string.Equals(request.VideoCodec, videoStream.Codec, StringComparison.OrdinalIgnoreCase)) { return false; } // If client is requesting a specific video profile, it must match the source if (!string.IsNullOrEmpty(request.Profile)) { if (string.IsNullOrEmpty(videoStream.Profile)) { return false; } if (!string.Equals(request.Profile, videoStream.Profile, StringComparison.OrdinalIgnoreCase)) { var currentScore = GetVideoProfileScore(videoStream.Profile); var requestedScore = GetVideoProfileScore(request.Profile); if (currentScore == -1 || currentScore > requestedScore) { return false; } } } // Video width must fall within requested value if (request.MaxWidth.HasValue) { if (!videoStream.Width.HasValue || videoStream.Width.Value > request.MaxWidth.Value) { return false; } } // Video height must fall within requested value if (request.MaxHeight.HasValue) { if (!videoStream.Height.HasValue || videoStream.Height.Value > request.MaxHeight.Value) { return false; } } // Video framerate must fall within requested value var requestedFramerate = request.MaxFramerate ?? request.Framerate; if (requestedFramerate.HasValue) { var videoFrameRate = videoStream.AverageFrameRate ?? videoStream.RealFrameRate; if (!videoFrameRate.HasValue || videoFrameRate.Value > requestedFramerate.Value) { return false; } } // Video bitrate must fall within requested value if (request.VideoBitRate.HasValue) { if (!videoStream.BitRate.HasValue || videoStream.BitRate.Value > request.VideoBitRate.Value) { return false; } } if (request.MaxVideoBitDepth.HasValue) { if (videoStream.BitDepth.HasValue && videoStream.BitDepth.Value > request.MaxVideoBitDepth.Value) { return false; } } if (request.MaxRefFrames.HasValue) { if (videoStream.RefFrames.HasValue && videoStream.RefFrames.Value > request.MaxRefFrames.Value) { return false; } } // If a specific level was requested, the source must match or be less than if (request.Level.HasValue) { if (!videoStream.Level.HasValue) { return false; } if (videoStream.Level.Value > request.Level.Value) { return false; } } if (request.Cabac.HasValue && request.Cabac.Value) { if (videoStream.IsCabac.HasValue && !videoStream.IsCabac.Value) { return false; } } return request.EnableAutoStreamCopy; } private static int GetVideoProfileScore(string profile) { var list = new List { "Constrained Baseline", "Baseline", "Extended", "Main", "High", "Progressive High", "Constrained High" }; return Array.FindIndex(list.ToArray(), t => string.Equals(t, profile, StringComparison.OrdinalIgnoreCase)); } internal static bool CanStreamCopyAudio(EncodingJobOptions request, MediaStream audioStream, List supportedAudioCodecs) { // Source and target codecs must match if (string.IsNullOrEmpty(audioStream.Codec) || !supportedAudioCodecs.Contains(audioStream.Codec, StringComparer.OrdinalIgnoreCase)) { return false; } // Video bitrate must fall within requested value if (request.AudioBitRate.HasValue) { if (!audioStream.BitRate.HasValue || audioStream.BitRate.Value <= 0) { return false; } if (audioStream.BitRate.Value > request.AudioBitRate.Value) { return false; } } // Channels must fall within requested value var channels = request.AudioChannels ?? request.MaxAudioChannels; if (channels.HasValue) { if (!audioStream.Channels.HasValue || audioStream.Channels.Value <= 0) { return false; } if (audioStream.Channels.Value > channels.Value) { return false; } } // Sample rate must fall within requested value if (request.AudioSampleRate.HasValue) { if (!audioStream.SampleRate.HasValue || audioStream.SampleRate.Value <= 0) { return false; } if (audioStream.SampleRate.Value > request.AudioSampleRate.Value) { return false; } } return request.EnableAutoStreamCopy; } private void ApplyDeviceProfileSettings(EncodingJob state) { var profile = state.Options.DeviceProfile; if (profile == null) { // Don't use settings from the default profile. // Only use a specific profile if it was requested. return; } var audioCodec = state.ActualOutputAudioCodec; var videoCodec = state.ActualOutputVideoCodec; var outputContainer = state.Options.OutputContainer; var mediaProfile = state.IsVideoRequest ? profile.GetAudioMediaProfile(outputContainer, audioCodec, state.OutputAudioChannels, state.OutputAudioBitrate) : profile.GetVideoMediaProfile(outputContainer, audioCodec, videoCodec, state.OutputWidth, state.OutputHeight, state.TargetVideoBitDepth, state.OutputVideoBitrate, state.TargetVideoProfile, state.TargetVideoLevel, state.TargetFramerate, state.TargetPacketLength, state.TargetTimestamp, state.IsTargetAnamorphic, state.IsTargetCabac, state.TargetRefFrames, state.TargetVideoStreamCount, state.TargetAudioStreamCount, state.TargetVideoCodecTag); if (mediaProfile != null) { state.MimeType = mediaProfile.MimeType; } var transcodingProfile = state.IsVideoRequest ? profile.GetAudioTranscodingProfile(outputContainer, audioCodec) : profile.GetVideoTranscodingProfile(outputContainer, audioCodec, videoCodec); if (transcodingProfile != null) { state.EstimateContentLength = transcodingProfile.EstimateContentLength; state.EnableMpegtsM2TsMode = transcodingProfile.EnableMpegtsM2TsMode; state.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo; } } } }