[Ffmpeg-devel] access to h264 stream in the decoder

[Benoit Fouet]

hello

Baptiste Coudurier wrote:
> Hi
>
> Luca Barbato wrote:
>   
>> M?ns Rullg?rd wrote:
>>     
>>> Benoit Fouet said:
>>>       
>>>> Hi all,
>>>>
>>>> first, as it is the first time I write in here, i'd like to thank every
>>>> people involved in this project for the work done (and hope i could help
>>>> some day).
>>>>
>>>> What i want to do is to extract the h.264 elementary stream from a
>>>> mpeg4/3GP container.
>>>> Is there a way to do it easily ?
>>>>         
>>> No, and this question belongs on ffmpeg-users.
>>>
>>>       
>> If it is how as in code snippet it could belong (and I would find useful
>> too) if is how as in ffmpeg -i file.mp4 -vcodec copy out.m4v or
>> equivalent...
>>
>> lu
>>
>>     
>
> Well problem with H264 in mp3/3gp is special NAL formatting and SPS/PPS
> in extradata, to export raw H264 streams from those containers you need
> a bitstream filter.

could you please elaborate on this bitstream filter ?
I'm willing to do it if it's not already done, so that one can easily
extract raw H264 data from a container bitstream.
Thanks for the explanation anyway...

-- Ben