[Ffmpeg-devel] Re: mov writer appends... (qt-faststart doesn't work on MP4/3GP)

[Stephane van Hardeveld]

Pat,

I might be able to obtain a draft version from 2002, don't know if it 
will work for you?

S.

Patrick Roberts wrote:
> Hi IIya-
> 
> 
>>...the MOV encoder in ffmpeg places the headers
> 
> necessary for seeking
> 
>>and video information at the end of the file rather
> 
> than at the
> 
>>beginning...
> 
> 
>   I'm working on a solution for this currently.  I
> have something I think will work for 2-pass encoding,
> but not yet elegantly for single pass.
> 
>   The qt-faststart mentioned doesn't work for MP4 or
> 3GP files.  Mp4creator's -optimize flag ends up
> ripping out atoms that it doesn't think are necessary,
> and sometimes breaks playback for some devices.
> 
>   I'm also working to add support for adding MP4/3GP
> hint tracks (required for many streaming servers). 
> Also on adding the avcC atom, which I'm not sure how
> avc1/h264 support inside MP4/3GP containers got
> included in ffmpeg, since MP4/3GP avc1 isn't supposed
> to work without a avcC block.
> 
>   One piece of info I'm missing is the rest of the MP4
> AVC standard, specifically ISO/IEC 14496-10.  If
> anyone knows were to find similar information (other
> than source code) without paying the $200 the IEC
> wants, please let me know.
> 
> -Pat
> 
> 
> --- Ilya Konstantinov <future at shiny.co.il> wrote:
> 
> 
>>Hi,
>>
>>Unlike Apple's QuickTime, Nokia's 3GP encoder etc.,
>>the MOV encoder in
>>ffmpeg places the headers necessary for seeking and
>>video information at
>>the end of the file rather than at the beginning,
>>that way making the
>>produced files less suitable for streaming. Also, I
>>suspect that this
>>fact causes 3gp files produced with ffmpeg not to
>>play on my Nokia 6230i
>>phone. I'm not sure of the later conclusion, but
>>when comparing files
>>produced by Nokia or QuickTime with ffmpeg's files,
>>ffmpeg's difference
>>seems to be in the header ordering.
>>
>>_______________________________________________
>>ffmpeg-devel mailing list
>>ffmpeg-devel at mplayerhq.hu
>>http://mplayerhq.hu/mailman/listinfo/ffmpeg-devel
>>
> 
> 
> 
> 
> 		
> __________________________________ 
> Yahoo! Music Unlimited 
> Access over 1 million songs. Try it free. 
> http://music.yahoo.com/unlimited/
> 
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/ffmpeg-devel