[MPlayer-users] Aspect-ratio oddity

[Stephen Mollett]

--- Meino Christian Cramer <Meino.Cramer at gmx.de>
wrote:
>  I have a video, which was recorded by a Siemens
> m740 dvbt-receiver (TV).
> ... 
>  I encoded this video from the mpeg2 into the mpeg4
> codec to save space. Before that I let mplayer
> guess the crop values. ... it comes out with
704:576.
> ...
>  While playing the resulting video, I recognized
> that the aspect ratio was wrong (egg-head syndrom).

704x576 is the correct (expected) active picture size
for PAL TV, but you must remember that PAL pixels are
not square, while computer pixels usually are.

You need to reduce the height of the video to
compensate for this; you could add scale=704:528 to
your command-line, after the crop filter, which would
correct the pixel-aspect.

Hope this helps,
Stephen

-- 

I haven't lost my mind - it's backed up on tape somewhere!


	
	
		
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