private static TrackState SelectMuxTrack(TrackState vtrack, TrackState atrack)
{
if (vtrack.Index != TrackState.Disabled && atrack.Index != TrackState.Disabled)
{
if (vtrack.Frame == null)
{
return(vtrack);
}
if (atrack.Frame == null)
{
return(atrack);
}
return(vtrack.Frame.StartTime <= atrack.Frame.StartTime ? vtrack : atrack);
}
if (vtrack.Index != TrackState.Disabled)
{
return(vtrack);
}
if (atrack.Index != TrackState.Disabled)
{
return(atrack);
}
return(null);
}
/*
* uncompressed audio and video input
*/
public static bool Run(MediaSocket vinput, string vfile, MediaSocket ainput, string afile, MediaSocket output)
{
bool res;
TrackState vtrack = new TrackState();
TrackState atrack = new TrackState();
using (UncompressedAVSplitter vsplit = new UncompressedAVSplitter())
using (UncompressedAVSplitter asplit = new UncompressedAVSplitter())
using (var transcoder = new Transcoder()
{
AllowDemoMode = true
})
{
try
{
if (vinput != null)
{
Console.WriteLine("video input file: \"{0}\"", vfile);
vsplit.Init(vinput, vfile);
Console.WriteLine("OK");
}
if (ainput != null)
{
Console.WriteLine("audio input file: \"{0}\"", afile);
asplit.Init(ainput, afile);
Console.WriteLine("OK");
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(false);
}
// setup transcoder
int trackIndex = 0; // start index
if (vinput != null)
{
transcoder.Inputs.Add(vinput);
vtrack.Index = trackIndex++;
}
if (ainput != null)
{
transcoder.Inputs.Add(ainput);
atrack.Index = trackIndex++;
}
transcoder.Outputs.Add(output);
res = transcoder.Open();
PrintError("transcoder open", transcoder.Error);
if (!res)
{
return(false);
}
// transcoding loop
for (;;)
{
if (vtrack.Index != TrackState.Disabled && vtrack.Frame == null)
{
vtrack.Frame = vsplit.GetFrame();
}
if (atrack.Index != TrackState.Disabled && atrack.Frame == null)
{
atrack.Frame = asplit.GetFrame();
}
TrackState track = SelectMuxTrack(vtrack, atrack);
if (track == null)
{
break;
}
// log
if (track.Frame != null)
{
if (track.Frame.StartTime - track.Progress >= 1.0)
{
track.Progress = track.Frame.StartTime;
Console.WriteLine("track {0} frame #{1} pts:{2}", track.Index, track.FrameCount, track.Frame.StartTime);
}
}
else
{
Console.WriteLine("track {0} eos", track.Index);
}
if (track.Frame != null)
{
res = transcoder.Push(track.Index, track.Frame);
if (!res)
{
PrintError("transcoder push frame", transcoder.Error);
return(false);
}
track.Frame = null; // clear the muxed frame in order to read to the next one
track.FrameCount++;
}
else
{
res = transcoder.Push(track.Index, null);
if (!res)
{
PrintError("transcoder push eos", transcoder.Error);
return(false);
}
track.Index = TrackState.Disabled; // disable track
}
}
res = transcoder.Flush();
if (!res)
{
PrintError("transcoder flush", transcoder.Error);
return(false);
}
transcoder.Close();
}
return(true);
}
