[FFmpeg-user] Combining yuvj422p and yuvj420p

Cecil Westerhof Cecil at decebal.nl
Mon Aug 18 10:37:43 CEST 2014

Op Tuesday 12 Aug 2014 10:11 CEST schreef Carl Eugen Hoyos:

>> Until know all my pictures where in yuv422p, but 
>> know there where also yuv422p pictures. I had done 
>> some searching on the internet and somewhere this 
>> was recommended.
> Where?

I found it in a Google search. This was some time ago and I can not
find it again. Was probably not very trustworthy. Again: I should have
asked sooner here.

> No known mpeg4 asp encoder or decoder supports 
> yuvj420p, so this doesn't make sense. The only 
> supported colourspace for all mpeg4 asp encoder 
> and decoder I know is yuv420p. Since it is the 
> only supported colourspace in FFmpeg's encoder 
> you don't have to specify it.

I am not an encoder/decoder expert. I am just someone who uses ffmpeg
to get reasonable results. Because it went wrong when I started using
yuv420p beside yuv422p I excepted the ‘tip’. But your tip was the real
tip. To bad that it is not integrated into the manpage: it will trip
up other people also I am afraid.

For people who want to see the result:

The switch that did not work first is at 13:30.

Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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