[FFmpeg-devel] H264: mp4toannexb BSF and streaming

[Benjamin Larsson]

On 08/18/2010 04:06 PM, Alexandre Ferrieux wrote:
> On 18/08/2010 15:33, Alexandre Ferrieux wrote:
>>
>> What I'm trying to do is understand where these "important" extradata
>> are in the 3GP chunk hierarchy:
>>
>> - either they already in a separate chunk that is non-causal (comes at
>> the end of the stream), and I'm doomed.
>>
>
> Further experiments with varied clip durations, sadly show that the
> above holds :(
>
> Indeed, the produced .3gp files contain a few O(1) blocks (which
> deserve the name of 'header' or 'trailer'), but also unfortunately
> *two* O(N) blocks: 'mdat' for main bitstream, 'moov' for extradata.
> There being more than one toplevel chunk O(N) in size, with important
> data in both, wipes any hope of live streaming. Good job, whoever
> designed that :/
>
> -Alex

qt-faststart in the tools directory can move the it around. As long as
you can control the stream you should be able to handle it.

MvH
Benjamin Larsson