[Mp4-tech] MP4/3GP File Format

[Dave Singer]

At 19:07 +0200 10/9/03, Nicolas GOUTTE wrote:
>Hi,
>
>I am working on a 3GP File maker and I can not understand why QuickTime
>did play it.
>It is a 3gp file with one AMR-NB track. All the samples are filled into
>one chunk.
>Thanks to have a look at the 3GP attached file and explain me my
>mistakes.

Only two, both small:
a) in the track header flags, you need to set them to at least enable 
the track (1);  I'd recommend 7 as the value, as that enables the 
track for playback in normal play and preview also;
b) I think QuickTime is balking at loading such a large chunk.  Most 
3G phones also load each media chunk by chunk, so you should still 
chunk up your media into say, 1/2 second intervals.  QuickTime *can* 
play your file if you ask it to save a movie (which re-chunks it), so 
that is my suspicion.
Very close!
>
>Nicolas.
>
>
>Content-Type: audio/3gpp;
>  name="3gpfile.3gp"
>Content-Disposition: inline;
>  filename="3gpfile.3gp"
>
>Attachment converted: DaveG49:3gpfile.3gp (????/----) (00012F0C)
>Content-Type: text/x-vcard; charset=us-ascii;
>  name="nicolas.goutte.vcf"
>Content-Transfer-Encoding: 7bit
>Content-Description: Card for Nicolas GOUTTE
>Content-Disposition: attachment;
>  filename="nicolas.goutte.vcf"
>
>Attachment converted: DaveG49:nicolas.goutte.vcf (TEXT/ttxt) (00012F0D)
>_______________________________________________
>Mp4-tech mailing list
>Mp4-tech lists.mpegif.org
>http://lists.mpegif.org/mailman/listinfo/mp4-tech

-- 
David Singer
Apple Computer/QuickTime