[M4IF Technotes] MP4 hint track

[Dave Singer]

At 11:14 +0200 9/4/02, Jean-Claude Dufourd wrote:
>RUTURAJ CHANDPUR wrote:
>>Can I create MP4 file containing only hint tracks(rtp hint), OD and
>>BIFS track?
>
>The question is not precise enough.
>You can do it, of course. The result will not be compliant though, 
>if I understood your intention. It says in the spec that if you 
>place the hint track in the MP4 file without the original non-hinted 
>media track, then it is not compliant. In this sentence, compliance 
>means to the MP4 file format specification.

The intent of this statement was so that files could always be played 
locally, re-edited, and so on.  It is possible to 'weasel around it', 
however;  you can save most of the space of the original media tracks 
by putting their access units in another file, referred to be a data 
reference URL.
>
>>How can I test this MP4 file?
>
>You have to find a player which supports MP4 file format, your 
>profile of OD and BIFS, of video, of audio... We cannot answer that 
>question in abstract.

JC is right.  However, there are a number of servers which will 
stream a hint-track only file, I think.  What they stream it to, is 
up to you...
-- 
David Singer
Apple Computer/QuickTime