[MPlayer-users] Creating yuv stream for encoding in Dirac

[鈴置友也]

Antonio Ondas wrote :

>Hello

>You can use $ lav2yuv -f file.mpg from the mjpeg-tools

>Antonio Ondas
-- 
 thank you..i downloaded source code of mjpeg-tool and compiled..it
couldn't success, but i got binary files of lav2yuv etc.. (in lavtools
directory)

i think lav2yuv is to extract .avi stream , and cut avi header and then
write as raw data...
yuv2lav is opposite .. combine avi header and streams...

 in the last e-mail i wrote `mplayer  t.m2v -vo yuv4mpeg '.... it means
create raw yuv streams without avi header.. and i can make raw streams 
(and sure i can make it with a avi header using `mencoder -ovc raw'),
but its colorspace is not yuv420 but yv12..that is the problem ...

when i execute `laveinfo' it says `++ WARN: [lavinfo]  Input file
xxxx.avi is not in JPEG 4:2:2 or 4:2:0 format' so these stream can't be
converted into dirac at all......


How to get 4:2:0 raw avi data with mplayer ??? i can't find the right way ..
how to convert YV12 colorspace streams into yuv420 stream ??

does anyone have a good tool to convert them ? tell me please, please,
please ....

thank you,
Tomonari Suzuoki
cso at katch.ne.jp