Hi, I'm having a problem with the audio sync on a rendered video. This is a video of a rock band playing. I have used the original audio from the cam (720P HDV, MPEGTS, 48.1khz audio) to sync up a multi-track recording of the same session (WAV, 48.1khz audio). When reviewing the audio waveform in Cinelerra, the new and old audio tracks align perfectly: http://content.serveftp.net/video/sync_audioalignment.png
Also, when playing back the video in the compositor, I hear no evidence of a sync problem. I can turn on both cam and externally recorded stereo tracks and listen the whole way through the four minute recording without any reverb or noticeable sync issues. However, after rendering the files to a final format, I get inconsistent results in xine and mplayer. Here are the results: sync.mov: Xine shows sync problems, mplayer no problems sync.mpg: Xine shows no sync problems, mplayer shows problems Here is twenty seconds of the song. Watch the drummers' snare drum hits for evidence of the sync problem: http://content.serveftp.net/video/sync.mov 3MB http://content.serveftp.net/video/sync.mpg 13MB Here are the specs for the renderings: mov: http://content.serveftp.net/video/sync_movrenderspec.png mpg: ffmpeg -f yuv4mpegpipe -i - -i /mnt/videos/20070113/test.wav -y -target dvd % (I use the second -i param to combine a WAV rendered from the same 20 second selection in the timeline (16bit linear/dither opts chosen)) The project specs are: http://content.serveftp.net/video/sync_projectformat.png if anybody can shed some light on this problem, that would sure help. scott _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
