[FFmpeg-devel] qt-faststart.c possibly implement in a format?

[Baptiste Coudurier]

Hi,

Tobias Brockamp wrote:
> Hi devels,
> 
> i'm using ffmpeg for mp4/h264 video for portables and now also for  
> flash player, i've read that for
> progressive download of mp4's in Flash Player the moov data has to be  
> at the beginning of
> the mp4 container.
> In the ffmpeg tools there is the qt-faststart.c program which does the  
> trick
> but i'm asking myself if it wouldn't be nice to have this build in in  
> a "format specification" like
> "-f ipod" for the uuid atom thing.
> 

I suppose yes.
Calculate worst case "moov" atom size when encoding a reasonably high
duration, if this size is reasonable, when using a flag in
AVFormatContext, write an empty "free" atom, and rewrite header in this
atom at the end, beware to change code to compute offsets of samples.

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