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Re: Aspect Ration and frame extraction

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Re: Aspect Ration and frame extraction

Posted by hasloe at 2009-10-14 14:34  

In almost all cases the aspect ratio used is the one reported by the media framework that plays the file. With the exception of mpeg-1 files on Mac, which QuickTime seems to like to display as 320x240; here we try to read image size information from the mpeg header and use that for the aspect ratio. ELAN does not interfere with DV files, it is completely up to the player framework.
The same for image extraction, the framework is just asked: give me the image for frame n. But here it seems not possible to override QT behaviour and it might be that the image is a bit smaller than expected.

But there will probably be an option to force a certain aspect ratio in a future version of ELAN; several reports have been issued on distorted video's, so it makes sense to make it possible for the user to change this.

-Han

 

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