public override Stream ProvideCustomActionFile(string action, string param)
{
if (action == "playlist")
{
WCFUtil.SetContentType("application/vnd.apple.mpegurl");
string playlistPath = Path.Combine(TemporaryDirectory, "index.m3u8");
if (!File.Exists(playlistPath))
{
StreamLog.Warn(Identifier, "HTTPLiveStreamer: Client requested index.m3u8 that doesn't exist for identifier '{0}'", Identifier);
return(Stream.Null);
}
// FFMpeg outputs the local segment paths in the playlist, replace with url
string playlist = ReplacePathsWithURLs(playlistPath);
if (playlist == string.Empty)
{
// The playlist file is empty until the first segment has finished being encoded,
// wait for next segment to begin and retry.
string segmentPath = Path.Combine(TemporaryDirectory, "000001.ts");
while (!File.Exists(segmentPath))
{
System.Threading.Thread.Sleep(100);
}
playlist = ReplacePathsWithURLs(playlistPath);
}
return(new MemoryStream(Encoding.UTF8.GetBytes(playlist)));
}
return(base.ProvideCustomActionFile(action, param));
}
private void InfoTimerTick(object source, ElapsedEventArgs args)
{
while (true)
{
try
{
// let's ignore the time here, for reasons detailed in VLCWrapperParsingUnit.cs around line 115
float position = transcoder.GetPosition();
StreamLog.Trace(context.Identifier, "VLCManagedInfo: calling NewPercentage with position {0}", position);
calculator.NewPercentage(position);
calculator.SaveStats(infoReference);
}
catch (Exception ex)
{
StreamLog.Warn(context.Identifier, "Failed to get VLC data", ex);
}
}
}
public bool Start()
{
// wait for the input pipe to be ready
if (transcoderInputStream is NamedPipe)
{
((NamedPipe)transcoderInputStream).WaitTillReady();
}
// copy the inputStream to the transcoderInputStream
if (doInputCopy)
{
StreamLog.Info(context.Identifier, "Encoding: Copy stream of type {0} into transcoder input stream of type {1}", InputStream.ToString(), transcoderInputStream.ToString());
StreamCopy.AsyncStreamCopy(InputStream, transcoderInputStream, "transinput");
}
// delay start of next unit till our output stream is ready
if (DataOutputStream is NamedPipe && (outputMethod == TransportMethod.NamedPipe || outputMethod == TransportMethod.StandardOut))
{
StreamLog.Trace(context.Identifier, "Transcoder running: {0}", !transcoderApplication.HasExited);
StreamLog.Info(context.Identifier, "Encoding: Waiting till output named pipe is ready");
var pipe = (NamedPipe)DataOutputStream;
var checkFailed = context != null && context.TranscodingInfo != null;
while (!pipe.IsReady && !(checkFailed && context.TranscodingInfo.Failed))
{
System.Threading.Thread.Sleep(100);
}
if (checkFailed && context.TranscodingInfo.Failed)
{
StreamLog.Warn(context.Identifier, "Encoding: Aborting wait because transcoder application failed and will never setup output named pipe.");
return(false);
}
}
return(true);
}
protected virtual VLCParameters GenerateVLCParameters(string options, string tsOptions, bool disableSeeking, string encoderOptions, string tsEncoderOptions, string muxerOptions)
{
List <string> arguments = options.Split(' ').Where(x => x.Length > 0).ToList();
// input
string inURL = "";
if (Context.NeedsInputReaderUnit)
{
inURL = @"stream://\#IN#";
}
else
{
inURL = Context.Source.GetPath();
}
// add tv options if specified
if ((Context.IsTv || Context.MediaInfo.Container == "MPEG-TS") && tsOptions.Length > 0)
{
arguments.AddRange(tsOptions.Split(' ').Where(x => x.Length > 0));
}
// position (disabling this is probably a bad idea as some things (watch sharing, transcoding info) fail then, which results in faulty clients.)
if (Context.StartPosition > 0 && !disableSeeking)
{
arguments.Add("--start-time=" + (Context.StartPosition / 1000));
}
// audio track
if (Context.AudioTrackId != null)
{
arguments.Add("--audio-track=" + Context.MediaInfo.AudioStreams.Where(x => x.ID == Context.AudioTrackId).First().Index);
}
else
{
StreamLog.Warn(Identifier, "VLC streaming without audio track is not implemented yet");
}
// subtitle selection
string subtitleTranscoder;
if (Context.SubtitleTrackId == null)
{
subtitleTranscoder = "scodec=none";
}
else
{
WebSubtitleStream stream = Context.MediaInfo.SubtitleStreams.First(x => x.ID == Context.SubtitleTrackId);
if (stream.Filename != null)
{
arguments.Add("--sub-file=" + stream.Filename);
}
else
{
arguments.Add("--sub-track=" + stream.Index);
}
subtitleTranscoder = "soverlay";
}
// create parameters
string sout;
if (!String.IsNullOrEmpty(encoderOptions))
{
sout = "#transcode{" + encoderOptions + "," + subtitleTranscoder;
if ((Context.IsTv || Context.MediaInfo.Container == "MPEG-TS") && !String.IsNullOrEmpty(tsEncoderOptions))
{
sout += "," + tsEncoderOptions;
}
if (!Context.Profile.TranscoderParameters.ContainsKey("noResize") || Context.Profile.TranscoderParameters["noResize"] != "yes")
{
sout += ",width=" + Context.OutputSize.Width + ",height=" + Context.OutputSize.Height;
}
sout += "}" + muxerOptions;
}
else
{
sout = "#" + muxerOptions.Substring(1);
}
// return
return(new VLCParameters()
{
Sout = sout,
Arguments = arguments.ToArray(),
Input = inURL
});
}
private void ParseOutputStream(Stream stdoutStream, Reference <WebTranscodingInfo> data, long startPosition, bool logProgress)
{
StreamReader reader = new StreamReader(stdoutStream);
TranscodingInfoCalculator calculator = new TranscodingInfoCalculator(position, 25, 500, info.Duration); //VLCWrapper prints twice a second
string line;
try
{
while ((line = reader.ReadLine()) != null)
{
try
{
StreamLog.Trace(identifier, "VLCWrapperParsing: read line {0}", line);
// just for debugging of the wrapper tool
if (line.StartsWith("A") || line.StartsWith("I") || line == "S started" || line == "S null")
{
continue;
}
// propagate start event to Start() method
if (line == "S playing")
{
vlcIsStarted = true;
continue;
}
// events
if (line == "S error")
{
vlcIsStarted = true;
data.Value.Finished = true;
data.Value.Failed = true;
break;
}
if (line == "S finished")
{
data.Value.Finished = true;
continue;
}
// the actual progress parsing
if (line.StartsWith("P"))
{
// Starting with VLCWrapper 0.2, the output format has changed. It is 'P [time in milliseconds]' now, which is quite easy for
// us to handle. With VLC 2 it also returns the time as a 64-bit integer, so we don't have overflow anymore either, but that risk
// is with milliseconds quite small anyhow: it requires 596 hours of video.
long milliseconds = Int64.Parse(line.Substring(2));
calculator.NewTime((int)milliseconds);
calculator.SaveStats(data);
continue;
}
StreamLog.Warn(identifier, "VLCWrapperParsing: encountered unknown line {0}", line);
}
catch (ThreadAbortException)
{
data.Value.Finished = true;
reader.Close();
return;
}
catch (Exception e)
{
StreamLog.Error(identifier, "Failure during parsing of VLC output", e);
}
}
}
catch (ThreadAbortException)
{
// The double try-catch is to make sure that the parsing doesn't stop when it can't process a single line, but that we don't
// log too much noise when a ThreadAbortException occurs while in the ReadLine() method. Funnily enough, this exception is
// rethrown when we leave the catch block, so duplicate some code from below...
data.Value.Finished = true;
reader.Close();
return;
}
data.Value.Finished = true;
reader.Close();
}
