[Ffmpeg-devel] Re: .mp4 demuxer broken?

Baptiste COUDURIER baptiste.coudurier
Wed Mar 22 00:43:36 CET 2006

Michael Niedermayer wrote:
> [...]
>> - do what I go atm, ignore 'mp4s' in video section. But then ugliness is
>> coming back.
> yes, maybe add a mov_data_tags table, while somewhat of an overkill it
> avoids the ugliness, but the sigle check is fine too 

I will apply it that way, since it seems there is no CODEC_ID_DATA
defined anywhere ? Is it ok to add one or something similar
(CODEC_ID_OTHER, CODEC_ID_UNKOWN) ? I would like to have a mov_data_tags
similar to other tags in mov.c

>> What do you think ?
>> Another problem spotted : many mp4 containing aac does not have a valid
>> sample rate, is there a way to force decoding first frame to let faad
>> init stream parameters ?
> yes, setting sample_rate to 0 if FAAD is available and the codec is AAC 
> should do the trick, if not then look at av_find_stream_info() and
> try_decode_frame() and faad.c

I will look at av_find_stream_info. Thanks

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