The VideoLAN Forums

Greetings,

I am using the following command to capture a live Quicktime (M4V/M4A) stream from a Darwin Streaming Server:

/Applications/VLC.app/Contents/MacOS/clivlc -I dummy rtsp://xxx.xxx.xxx/xxx.sdp --sout '#standard{access=file,mux=mov,dst=/xxx/xxx/xxx.mov}'

It works great.. Well, almost. About 50% of the time, it seems the audio track of the resulting file does not exist. On closer examination, it does exist but is unable to be played back by VLC or QuickTime. MPlayer on the other hand does play it back. When I look at the properties in QuickTime, I see that the audio track duration and start time is off. The Start Time is a series of negative numbers '-18:-38.-61' and the duration is approximately this start time plus the duration of the video (41:27.86 when the video is 22:49.38 given the above Start Time).

Again, this only seems to happen 50% of the time. I am at a bit of a loss. Any suggestions?

Thanks,
shawn

I'm seeing something similar when I use videolan to record TV shows from a Hauppauge TV card. Most of the time, the shows are recorded OK, however, there is the occasional show that has no audio, or the audio cuts out part way thru the recording or the audio is there, but only starts playing when near the end of the video file.

Usually, Windows Media player or videolan can't play the audio, but it is there. If I use virtualdubmod, the audio track is present & virtualdub plays the file OK. Sometimes the audio just cuts off right in the middle of a recording, for no apparent reason, just get a click, & it's gone.

When this happens there is no audio after a certian point, I demuxed the audio track to a wav file & looked at it in Audacity, file size indicates a 2 hour 18 minute wav file, but there is no sound after 1 hour 8 minutes.

This is a weird problem, never seen this happen with another app, got no idea what the trigger is.