[FFmpeg-devel] [PATCH] h264 bitstream filter

Benoit Fouet benoit.fouet
Wed Sep 5 21:04:18 CEST 2007


M?ns Rullg?rd wrote:
> Benoit Fouet <benoit.fouet at purplelabs.com> writes:
>
>   
>> Michael Niedermayer wrote:
>>     
>>> patch ok if it works
>>>
>>> [...]
>>>   
>>>       
>> i have one remaining question: should mp4 files contain AUD nal units
>> too or have i missed something (again :) ) ?
>> if i'm right, it seems that our muxer doesn't handle it, as i don't get
>> the aud frames...
>> if i'm wrong, i'll have to add the aud in the filter too.
>>     
>
> AUD (Access Unit Delimiter) is an optional NAL unit with the sole
> purpose of marking the start of a new frame (access unit).  There
> would be no sense in using it in formats like mp4 that signal frame
> boundaries by other means.
>   

so, it isn't necessary to add AUD to the "reconstructed" data flow neither ?

Ben





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