On Thu, 8 Sep 2005, Stan Gammons wrote:
> Is there a way to convert a mjpeg 4:1:1 file (Matrox AVI format) to a
> "standard" 4:2:2 or 4:2:0 file format using mjpegtools? Other tools?
> Forget about it?
Motion JPEG was/is, a 4:2:2 format, I thought. 4:1:1 sounds like
a DV variant.
Do you know the fourcc of the AVI file? Perhaps a bit of research
can dig up some info on what how matrox is packing the bytes and
encoding the data.
CHroma conversion can be done with mjpegtools + y4mscaler (the latter
is at http://www.mir.com/DMG/Software/y4mscaler.html) but first the
data needs to be decoded into 4:1:1 YUV - after that things are
trivial.
Have you tried 'mplayer' or 'ffmpeg'? If they can read the format
then the decoding part is solved.
Cheers,
Steven Schultz
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