[MPlayer-DOCS] Interested in contributing case studies

[Guillaume Poirier]

Hi,


On Oct 26, 2006, at 6:10 , Mark Pilgrim wrote:

> On 10/23/06, Guillaume Poirier <gpoirier at mplayerhq.hu> wrote:
>>
>
>> The doc here:
>> http://developer.apple.com/documentation/QuickTime/Conceptual/
>> QT7-1_Update_Guide/Content/2NewFeaturesChangesa.html
>
> I'm sorry, those docs are way over my head.  Is it describing some
> QuickTime-specific way of embedding the correct aspect ratio?


I don't know. I have googled a bit, and had a look at doom9 forum, I  
found this post: http://forum.doom9.org/showthread.php? 
p=381369#post381369 which is from someone who is supposed to be quite  
reliable given the quality of this remarks in both doom9 and FFmpeg ML.

I haven't found information on mp4box or mp4creator as to whether or  
not they support "composition matrix".


>   If so,
> perhaps it would be possible to automate that with MP4Box or some
> other tool that can manipulate raw atoms.
>
>> Also, like I said, I don't quite like "too personal" style, so I'd
>> prefer smth along the lines of:
>
> I'm happy to make the other stylistic changes after we come to a
> consensus on the aspect ratio problem.


If you manage to find a way to set "composition matrix" with one of  
the 2 mp4 muxing tools, then I'd happily drop the section about  
upscaling, otherwise, I'd put a note that says that it's workaround  
needed until the above mentioned tools support QuickTime aspect ratio.

Guillaume