261 lines
9.1 KiB
C#
261 lines
9.1 KiB
C#
using System.IO;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Entities;
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using System;
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using MediaBrowser.Controller.Library;
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using ServiceStack.ServiceHost;
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namespace MediaBrowser.Api.Playback.Progressive
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{
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/// <summary>
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/// Class GetAudioStream
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/// </summary>
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[Route("/Videos/{Id}/stream.ts", "GET")]
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[Route("/Videos/{Id}/stream.webm", "GET")]
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[Route("/Videos/{Id}/stream.asf", "GET")]
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[Route("/Videos/{Id}/stream.wmv", "GET")]
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[Route("/Videos/{Id}/stream.ogv", "GET")]
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[Route("/Videos/{Id}/stream.mp4", "GET")]
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[Route("/Videos/{Id}/stream.m4v", "GET")]
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[Route("/Videos/{Id}/stream.mkv", "GET")]
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[Route("/Videos/{Id}/stream.mpeg", "GET")]
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[Route("/Videos/{Id}/stream.avi", "GET")]
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[Route("/Videos/{Id}/stream.m2ts", "GET")]
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[Route("/Videos/{Id}/stream", "GET")]
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[Route("/Videos/{Id}/stream.ts", "HEAD")]
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[Route("/Videos/{Id}/stream.webm", "HEAD")]
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[Route("/Videos/{Id}/stream.asf", "HEAD")]
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[Route("/Videos/{Id}/stream.wmv", "HEAD")]
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[Route("/Videos/{Id}/stream.ogv", "HEAD")]
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[Route("/Videos/{Id}/stream.mp4", "HEAD")]
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[Route("/Videos/{Id}/stream.m4v", "HEAD")]
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[Route("/Videos/{Id}/stream.mkv", "HEAD")]
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[Route("/Videos/{Id}/stream.mpeg", "HEAD")]
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[Route("/Videos/{Id}/stream.avi", "HEAD")]
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[Route("/Videos/{Id}/stream.m2ts", "HEAD")]
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[Route("/Videos/{Id}/stream", "HEAD")]
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[ServiceStack.ServiceHost.Api(Description = "Gets a video stream")]
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public class GetVideoStream : VideoStreamRequest
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{
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}
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/// <summary>
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/// Class VideoService
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/// </summary>
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public class VideoService : BaseProgressiveStreamingService
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{
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public VideoService(IServerApplicationPaths appPaths, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager)
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: base(appPaths, userManager, libraryManager, isoManager)
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{
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}
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/// <summary>
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/// Gets the specified request.
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.Object.</returns>
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public object Get(GetVideoStream request)
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{
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return ProcessRequest(request, false);
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}
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public object Head(GetVideoStream request)
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{
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return ProcessRequest(request, true);
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}
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/// <summary>
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/// Gets the command line arguments.
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/// </summary>
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/// <param name="outputPath">The output path.</param>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected override string GetCommandLineArguments(string outputPath, StreamState state)
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{
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var video = (Video)state.Item;
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var probeSize = Kernel.Instance.FFMpegManager.GetProbeSizeArgument(video.VideoType, video.IsoType);
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// Get the output codec name
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var videoCodec = GetVideoCodec(state.VideoRequest);
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var graphicalSubtitleParam = string.Empty;
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if (state.SubtitleStream != null)
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{
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// This is for internal graphical subs
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if (!state.SubtitleStream.IsExternal && (state.SubtitleStream.Codec.IndexOf("pgs", StringComparison.OrdinalIgnoreCase) != -1 || state.SubtitleStream.Codec.IndexOf("dvd", StringComparison.OrdinalIgnoreCase) != -1))
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{
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graphicalSubtitleParam = GetInternalGraphicalSubtitleParam(state, videoCodec);
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}
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}
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var format = string.Empty;
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var keyFrame = string.Empty;
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if (string.Equals(Path.GetExtension(outputPath), ".mp4", StringComparison.OrdinalIgnoreCase))
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{
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format = " -f mp4 -movflags frag_keyframe+empty_moov";
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var framerate = state.VideoRequest.Framerate ??
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state.VideoStream.AverageFrameRate ?? state.VideoStream.RealFrameRate ?? 23.976;
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framerate *= 2;
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keyFrame = " -g " + Math.Round(framerate);
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}
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return string.Format("{0} {1} -i {2}{3}{4} -threads 0 {5} {6}{7} {8}{9} \"{10}\"",
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probeSize,
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GetFastSeekCommandLineParameter(state.Request),
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GetInputArgument(video, state.IsoMount),
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GetSlowSeekCommandLineParameter(state.Request),
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keyFrame,
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GetMapArgs(state),
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GetVideoArguments(state, videoCodec),
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graphicalSubtitleParam,
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GetAudioArguments(state),
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format,
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outputPath
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).Trim();
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}
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/// <summary>
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/// Gets video arguments to pass to ffmpeg
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="videoCodec">The video codec.</param>
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/// <returns>System.String.</returns>
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private string GetVideoArguments(StreamState state, string videoCodec)
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{
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var args = "-vcodec " + videoCodec;
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var request = state.VideoRequest;
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// If we're encoding video, add additional params
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if (!videoCodec.Equals("copy", StringComparison.OrdinalIgnoreCase))
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{
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// Add resolution params, if specified
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if (request.Width.HasValue || request.Height.HasValue || request.MaxHeight.HasValue || request.MaxWidth.HasValue)
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{
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args += GetOutputSizeParam(state, videoCodec);
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}
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if (request.Framerate.HasValue)
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{
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args += string.Format(" -r {0}", request.Framerate.Value);
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}
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// Add the audio bitrate
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var qualityParam = GetVideoQualityParam(request, videoCodec);
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if (!string.IsNullOrEmpty(qualityParam))
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{
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args += " " + qualityParam;
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}
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args += " -vsync vfr";
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}
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else if (IsH264(state.VideoStream))
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{
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// FFmpeg will fail to convert and give h264 bitstream malformated error if it isn't used when converting mp4 to transport stream.
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args += " -bsf h264_mp4toannexb";
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}
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return args;
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}
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/// <summary>
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/// Gets audio arguments to pass to ffmpeg
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/// </summary>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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private string GetAudioArguments(StreamState state)
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{
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// If the video doesn't have an audio stream, return a default.
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if (state.AudioStream == null)
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{
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return string.Empty;
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}
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var request = state.Request;
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// Get the output codec name
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var codec = GetAudioCodec(request);
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if (codec.Equals("copy", StringComparison.OrdinalIgnoreCase))
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{
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return "-acodec copy";
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}
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var args = "-acodec " + codec;
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// Add the number of audio channels
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var channels = GetNumAudioChannelsParam(request, state.AudioStream);
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if (channels.HasValue)
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{
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args += " -ac " + channels.Value;
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}
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if (request.AudioSampleRate.HasValue)
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{
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args += " -ar " + request.AudioSampleRate.Value;
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}
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if (request.AudioBitRate.HasValue)
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{
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args += " -ab " + request.AudioBitRate.Value;
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}
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var volParam = string.Empty;
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// Boost volume to 200% when downsampling from 6ch to 2ch
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if (channels.HasValue && channels.Value <= 2 && state.AudioStream.Channels.HasValue && state.AudioStream.Channels.Value > 5)
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{
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volParam = ",volume=2.000000";
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}
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args += string.Format(" -af \"aresample=async=1000,{0}\"", volParam);
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return args;
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}
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/// <summary>
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/// Gets the video bitrate to specify on the command line
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/// </summary>
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/// <param name="request">The request.</param>
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/// <param name="videoCodec">The video codec.</param>
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/// <returns>System.String.</returns>
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private string GetVideoQualityParam(VideoStreamRequest request, string videoCodec)
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{
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var args = string.Empty;
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// webm
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if (videoCodec.Equals("libvpx", StringComparison.OrdinalIgnoreCase))
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{
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args = "-g 120 -cpu-used 1 -lag-in-frames 16 -deadline realtime -slices 4 -vprofile 0";
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}
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// asf/wmv
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else if (videoCodec.Equals("wmv2", StringComparison.OrdinalIgnoreCase))
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{
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args = "-g 100 -qmax 15";
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}
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else if (videoCodec.Equals("libx264", StringComparison.OrdinalIgnoreCase))
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{
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args = "-preset superfast";
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}
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if (request.VideoBitRate.HasValue)
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{
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args += " -b:v " + request.VideoBitRate;
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}
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return args.Trim();
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}
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}
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}
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