[FFmpeg-devel] GoC 2008 and H264 SVC decoder

Jeff Downs heydowns
Wed Mar 26 16:57:57 CET 2008

On Wed, 26 Mar 2008, Thorsten Jordan wrote:

> > You can get two fields of the same parity consecutively, but the first one 
> > of the two would be considered an unpaired field (and possibly the second, 
> > depending on what followed it).
> so unpaired field means error in stream? e.g. two consecutive top fiels
> without bottom field aren't really sensible...

No, that's perfectly legitimate. Unpaired fields can be used for reference 
purposes when decoding later fields.  It wasn't clear to me, however, if 
unpaired fields are intended for output (display).  Current ffmpeg h264 
decoder only uses unpaired fields for reference. They are never output.


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