[Mp4-tech] Regarding Gaps in Frame number

[Wesley De Neve]

Dear Srihari,
A gap in the value of the frame_num syntax element (in the slice header 
syntax structure of H.264/AVC) indicates that a reference picture is missing 
(frame_num acts as a counter that is incremented *after* the decoding of a 
reference picture, but not after the decoding of a non-reference picture). 
This functionality can for instance be used for the purpose of error 
conceilment.
A search in the archives of this mailing list (maybe using Google) might be 
useful as the semantics of frame_num has already been discussed a few times 
in the past.
Best regards,
Wesley De Neve
Sri wrote:
> Dear All,
>
> Can anyone tell me the signficance of Gaps in frame number in H.264.
> why it is used.
>
> Regards,
> Srihari
>
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