[Mp4-tech] MP4 file format with QuickTime

[Ariel David]

Hi all,
Thanks for the replies.
It was apparently my bug.  
One of the reserved values in the file was incorrect and QT is apparently very picky.
Cheers,
Ariel
-----Original Message-----
From: Dave Singer [mailto:singer apple.com]
Sent: Monday, January 26, 2024 22:25
To: Ariel David; mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech] MP4 file format with QuickTime
At 1:04 PM +0200 1/26/04, Ariel David wrote:
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Hi all,
I have an MP4 (mpeg-4 system) stream that I created with my own encoder.
This is an encoder that I built according to the standard.
The stream is playable with Windows Media Player, but QuickTime will not play it.
I noticed in the standard that there is something about QuickTime file format.
only an informative note ... -:)
if you are making MP4 files according to the spec. and QT isn't playing them, various possibilities come to mind
a) you're using a sub-system QT doesn't implement (e.g. BIFS, the still-frame coder, any audio object except AAC...)
b) we have a bug... (we do)
c) you have a bug...
....
Is there something special that I need to insert into the stream so that QuickTime can play it.
really hard to say without more details...
Furthermore, I checked streams created by other encoders and noticed that in certain places that
are defined as reserved in the standard are different in these streams.
at what layer, and what is different from what?
Can someone explain this nice little phenomenon with QuickTime?
Cheers,
Ariel
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-- 
David Singer
Apple Computer/QuickTime
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