On 21/11/2008, at 8:53 AM, aviad rozenhek wrote:

> You can tell Key (I) versus not Key (P or B) by looking at the flags
>
>> field in the AVPacket structure and seeing if the PKT_FLAG_KEY bit is
>> set to true.
>>
>
> thanks! what about B frames, and even better, knowing if a B frame  
> is a
> reference frame or not?


I thought that B frame pyramids where only available with H264, not  
mpeg2 (H262)

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