[MEncoder-users] B-frames and GOP with MPEG-2 for DVD

[Nico Sabbi]

Nicolas Hesler wrote:

>Nico Sabbi wrote:
>  
>
>>Nicolas Hesler wrote:
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>>>Thanks again for your prompt help.    Why do you say magically?  What 
>>>is controversial with those options?
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>>> 
>>>
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>>as I wrote, -mc 0 -noskip disables mencoder's mechanism to keep synchrony
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>
>I guess what I meant to ask was :  so mencoder's mechanism for keeping 
>synchrony doesn't always work and disabling sometimes keeps sync?
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yes

>So even if I get 1 duplicate frame (which seems to be case, in all my 
>videos), it could still be in absolute sync?
>  
>
yes

>How is it that the A-V sync info is not always an indicator of sync?
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>

sometimes, with some crazy containers used in horrible manners
(think of mpeg*, H264 of avi, packed mpeg4 in avi and other amenities)
mencoder doesn't even know the correct timestamps of the original streams,
thus you can't expect it to do a good job in the output stream

 
 
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