[MPlayer-users] x264 and loss of sync with B-frames

Loren Merritt lorenm at u.washington.edu
Tue May 17 09:19:46 CEST 2005

On Mon, 16 May 2005, Rich Felker wrote:
> On Mon, May 16, 2005 at 09:05:12AM -0400, Jason Tackaberry wrote:
>> Anyway, I haven't noticed similar sync problems when using lavc.  With
>> x264, using B-frames actually causes an increased frame count in the
>> resulting output.  So it doesn't seem to me to be an architecture issue
>> if lavc doesn't have this problem.  Unless mencoder has those ugly hacks
>> you mentioned for lavc but not x264?
> it's probably a bug in the ve_x264 wrapper, writing a bogus "frame" at
> the beginning. if you fix this, maybe the problem would go away..?

I haven't encountered such bug. ve_x264 checks for and omits any null 
frames at the beginning. All of my encodes have exactly the same number of 
frames as the source video.

I can't comment on A/V sync; I don't use mencoder for audio.

--Loren Merritt

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