[MPlayer-dev-eng] Re: [RFC] change lacv's MPEG-4 encoding options defaults

[Nico Sabbi]

Matthias Wieser wrote:

>Am Mittwoch, 28. Dezember 2005 21:34 schrieb Rich Felker:
>  
>
>>On Wed, Dec 28, 2005 at 06:08:54PM +0000, Robert Swain wrote:
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>>>The default number of b-frames for x264 is currently 0 while most
>>>people use 2/3 as standard. Fair enough b-frames stored in avi aren't
>>>perfect, but standalones can play the produced files, most if not all
>>>software can play the produced files, so is this a real problem?
>>>      
>>>
>>Like I said: mencoder is broken so B frames cause a/v desync!!
>>    
>>
>
>??
>That's only true under some circumstances. Normally mencoder + bframes 
>works very well. Additionally B-frames have been recommended for the 
>doom9 codec comparison. I don't think Corey made this to make mencoder 
>look bad :-)
>
>  
>

depends on how many b-frames you use: in mpeg4 tipically only up to 2 
are used,
but in h264 people seem to even 5 and more.
The more there are the more audio and video will desync.