[x264-devel] x264, ffmpeg and yuv4mpegpipe...

[Alec Robertson]

Hi,

I posted this also to the doom9 forum
(http://forum.doom9.org/showthread.php?t=117717) but thought it might be
worth bringing up here... 

Basically, I want to pipe a vob out of ffmpeg, through yuvdeinterlace
and y4mscaler and then into x264. The following works fine:
    mkfifo -m 660 dvd.y4m
    ffmpeg -t 30 -i vts_01_0.vob -f yuv4mpegpipe - | \
        yuvdeinterlace19 -s0 | \
        y4mscaler -v0 -I active=704x352+8+64 -O size=704x384 -O sar=1:1 | \
        > dvd.y4m &
    x264 -b 1000 -o dvd.264 dvd.y4m

But when I try to include x264 in the pipe directly I get weird
scrolling and color shifting on the encoded video:
    ffmpeg -t 30 -i vts_01_0.vob -f yuv4mpegpipe - | \
        yuvdeinterlace19 -s0 | \
        y4mscaler -v0 -I active=704x352+8+64 -O size=704x384 -O sar=1:1 | \
        x264 -b 1000 -o dvd.264 - 704x384

I've found "-f rawvideo" to work for ffmpeg directly into x264, but then
the yuvdeinterlace and y4mscaler do not work as there is no yuv4mpeg
header. I'm sure I could do the all-in-one-pipe with ffmpeg or mencoder,
but I'm really looking to do it with x264...

All of the source and output files are here: http://web.mit.edu/alecr/www/x264/

Cheers,

Alec



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