[MPlayer-users] x264 and loss of sync with B-frames
tack at sault.org
Mon May 16 06:49:23 CEST 2005
Using mencoder and x264 from tonight's cvs/svn. I've been experimenting
with x264, and I've noticed that when I use B-frames I get output whose
number of frames increases with the number of B-frames I use, which
seems to directly affect A/V sync.
Here's the mencoder command I'm using:
mencoder -dvd-device I_Robot.dvd dvd://1 -vf hqdn3d=2:1:2,crop=704:368:8:54 \
-ofps 24000/1001 -oac copy -ss 6:00 -frames 250 -ovc x264 -x264encopts \
bitrate=1500:pass=$PASS:4x4mv:frameref=6:bframes=10 -o clip.avi
Setting bframes=0 results in a clip.avi which is perfectly in sync.
Setting bframes=1 causes the clip to become slightly out of sync but not
very perceptible. Setting bframes=10 or 15 causes it to become
noticeably out of sync.
Am I doing something wrong? Or is this a bug in mencoder or x264? Let
me know if you'd like me to upload the clip.
More information about the MPlayer-users