Ejemplo n.º 1
0
        public Resolution CalculateSize(TranscoderProfile profile, MediaSource source, WebMediaInfo info = null)
        {
            try
            {
                if (!profile.HasVideoStream)
                    return new Resolution(0, 0);

                if (info == null)
                {
                    info = MediaInfoHelper.LoadMediaInfoOrSurrogate(source);
                }

                if (info.VideoStreams.Count > 0)
                {
                    return Resolution.Calculate(info.VideoStreams.First().DisplayAspectRatio, profile.MaxOutputWidth, profile.MaxOutputHeight, 2);
                }
            }
            catch (Exception ex)
            {
                Log.Warn("Failed to calculate size of output stream", ex);
            }

            // default
            return Resolution.Calculate(MediaInfoHelper.DEFAULT_ASPECT_RATIO, profile.MaxOutputWidth, profile.MaxOutputHeight, 2);
        }
Ejemplo n.º 2
0
 public Resolution CalculateSize(TranscoderProfile profile, decimal displayAspectRatio)
 {
     return Resolution.Calculate(displayAspectRatio, profile.MaxOutputWidth, profile.MaxOutputHeight, 2);
 }
Ejemplo n.º 3
0
        public string StartStream(string identifier, TranscoderProfile profile, int position = 0, int audioId = STREAM_DEFAULT, int subtitleId = STREAM_DEFAULT)
        {
            // there's a theoretical race condition here between the insert in InitStream() and this, but the client should really, really
            // always have a positive result from InitStream() before continuing, so their bad that the stream failed.
            if (!Streams.ContainsKey(identifier) || Streams[identifier] == null)
            {
                Log.Warn("Stream requested for invalid identifier {0}", identifier);
                return null;
            }

            if (profile == null)
            {
                Log.Warn("Stream requested for non-existent profile");
                return null;
            }

            try
            {
                lock (Streams[identifier])
                {
                    Log.Debug("StartStream with identifier {0} for file {1}", identifier, Streams[identifier].Context.Source.GetDebugName());

                    // initialize stream and context
                    ActiveStream stream = Streams[identifier];
                    stream.Context.StartPosition = position;
                    stream.Context.Profile = profile;
                    stream.Context.MediaInfo = MediaInfoHelper.LoadMediaInfoOrSurrogate(stream.Context.Source);
                    stream.Context.OutputSize = CalculateSize(stream.Context);
                    Reference<WebTranscodingInfo> infoRef = new Reference<WebTranscodingInfo>(() => stream.Context.TranscodingInfo, x => { stream.Context.TranscodingInfo = x; });
                    Log.Debug("Using {0} as output size for stream {1}", stream.Context.OutputSize, identifier);
                    sharing.StartStream(stream.Context, infoRef);

                    // get transcoder
                    stream.Transcoder = (ITranscoder)Activator.CreateInstance(Type.GetType(profile.TranscoderImplementationClass));
                    stream.Transcoder.Identifier = identifier;

                    // get audio and subtitle id
                    if (stream.Context.MediaInfo.AudioStreams.Where(x => x.ID == audioId).Count() > 0)
                    {
                        stream.Context.AudioTrackId = stream.Context.MediaInfo.AudioStreams.Where(x => x.ID == audioId).First().ID;
                    }
                    else if (audioId == STREAM_DEFAULT)
                    {
                        string preferredLanguage = Configuration.Streaming.DefaultAudioStream;
                        if (stream.Context.MediaInfo.AudioStreams.Count(x => x.Language == preferredLanguage) > 0)
                        {
                            stream.Context.AudioTrackId = stream.Context.MediaInfo.AudioStreams.First(x => x.Language == preferredLanguage).ID;
                        }
                        else if (preferredLanguage != "none" && stream.Context.MediaInfo.AudioStreams.Count() > 0)
                        {
                            stream.Context.AudioTrackId = stream.Context.MediaInfo.AudioStreams.First().ID;
                        }
                    }

                    if (stream.Context.MediaInfo.SubtitleStreams.Where(x => x.ID == subtitleId).Count() > 0)
                    {
                        stream.Context.SubtitleTrackId = stream.Context.MediaInfo.SubtitleStreams.Where(x => x.ID == subtitleId).First().ID;
                    }
                    else if (subtitleId == STREAM_DEFAULT)
                    {
                        string preferredLanguage = Configuration.Streaming.DefaultSubtitleStream;
                        if (stream.Context.MediaInfo.SubtitleStreams.Count(x => x.Language == preferredLanguage) > 0)
                        {
                            stream.Context.SubtitleTrackId = stream.Context.MediaInfo.SubtitleStreams.First(x => x.Language == preferredLanguage).ID;
                        }
                        else if (preferredLanguage == "external" && stream.Context.MediaInfo.SubtitleStreams.Count(x => x.Filename != null) > 0)
                        {
                            stream.Context.SubtitleTrackId = stream.Context.MediaInfo.SubtitleStreams.First(x => x.Filename != null).ID;
                        }
                        else if (preferredLanguage == "first" && stream.Context.MediaInfo.SubtitleStreams.Count() > 0)
                        {
                            stream.Context.SubtitleTrackId = stream.Context.MediaInfo.SubtitleStreams.First().ID;
                        }
                    }
                    Log.Debug("Final stream selection: audioId={0}, subtitleId={1}", stream.Context.AudioTrackId, stream.Context.SubtitleTrackId);

                    // build the pipeline
                    stream.Context.Pipeline = new Pipeline();
                    stream.Context.TranscodingInfo = new WebTranscodingInfo();
                    stream.Transcoder.BuildPipeline(stream.Context);

                    // start the processes and retrieve output stream
                    stream.Context.Pipeline.Assemble();
                    stream.Context.Pipeline.Start();

                    Stream finalStream = Streams[identifier].Context.Pipeline.GetFinalStream();
                    if (finalStream != null)
                    {
                        Streams[identifier].OutputStream = new ReadTrackingStreamWrapper(finalStream);
                    }

                    Log.Info("Started stream with identifier " + identifier);
                    return stream.Transcoder.GetStreamURL();
                }
            }
            catch (Exception ex)
            {
                Log.Error("Failed to start stream " + identifier, ex);
                return null;
            }
        }