Martin,
I've found that same problem with audio sync. Fortunately, ffmpeg provides an audio sync method. Just call ffmpeg with `-async 1` as such:
# ffmpeg -async 1 ...rest of your args...
-Rick
--- Ricardo Miguel Lugo
On Feb 27, 2005, at 6:04 PM, Martin Vaughan wrote:
Hi, this might be off-topic, but I guess someone here might be able to help.
I am using the the IVTV driver with my adaptec avc-2010 capture card. I
use cat /dev/video0 > temp.mpg to generate an mpg2 file. This file plays
back fine with mplayer.
However, I then try to use ffmpeg or transcode to build an mpeg4 file from temp.mpg, I seem to end up with serious lip sync problems (ffmpeg) when the file is > 2GB (transcode complains about the structure of the file and virtualdubmod under windows crashes when I try to view the properties of the temp.mpg file).
I do not think this is a problem with the driver, but rather applications having difficulty with files over 2GB, possibly due to 32 bit architecture.
Is there an alternative to using cat /dev/video0 - a command that would
generate separate files of <2gb chunks, with any mpg2 headers in place -
that is, I wouldn't have thought the files would be valid if I sliced my
8 gig file ainto 4 x 2GB pieces.
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