[Ffmpeg-devel] [BUG] DV in QuickTime - Aspect Ratio

herve.flores herve.flores
Thu Mar 15 12:25:12 CET 2007


Le 15 mars 07 ? 11:02, herve.flores a ?crit :

>
> Le 15 mars 07 ? 01:46, Roman Shaposhnick a ?crit :
>
>> On Wed, 2007-03-14 at 16:51 -0500, Brian Brice wrote:
>>>> if you set aperture mode to "clean"
>>>> and mode dimensions to "1"
>>>> then your .mov will be display as 16:9 with QTplayer > v7
>>>>
>>>> PS: the output (.mov) from ffmpeg is "simple", the aperture bit  
>>>> "clean"
>>>> does its job (=display an anamorphous file in square mode)
>>>> but with files generated by other softs (iMovie for example, which
>>>> generate a very complicated .mov), it doesn't work every time :-(
>>>> so I don't trust the aperture mode...
>>>>
>>>
>>> I'm not quite sure if all of this is needed for QuickTime?
>>
>>   My assumption all along has been that it is usually container's
>> job to store things like SAR, DAR, etc. But since DV is both
>> a container and a codec format I have nothing against moving
>> SAR initialization to libavcodec. Unless somebody tells me
>> its a stupid idea.
>>
>>> Using the command that herve posted would create a video that the
>>> QuickTime player recognizes as 16:9, but ffmpeg reading does not.
>>
>>   Right. And that's because QuickTime gives precedence to the DV
>> metadata and not the container, ffmpeg is the other way around.
>> I'm not really sure which way I prefer.
>>
>> Thanks,
>> Roman.
>
> just for info (on Mac OSX 10.4.9 with QuickTime 7.1.3) :
> the 16:9 aspect in the .mov is not displayed on my computer.
> display size is 720*576 (except if I check the aperture bit)
>
> I will verify with QT 7.1.5 when I will install it
>
> Herv?

(auto reply)
with QT 715, same behavior:
the .mov (containing dv stream in 16:9) is displayed in 720*576

if I save the dv stream in a .mov container using QTPro, QT adds the  
aperture bit ("clean") and the resulting display is 16:9

bye

Herv?



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