[MPlayer-users] Y4m

[Rolf Ernst]

I am trying to use mencoder in my little GUI to create VP8 encoded 
filtes. From what I see that support is not natively working (yet?). 
Anyhow, there are patches but I don't seem to be able to apply come of 
them. Decoder support appears to be there.

So I am trying to pipe the output into ivfenc via something like this 
(this is Nic's modified version accepting pipes).

mencoder -dvd-device "D:\ElephantsDream\VIDEO_TS" dvd://1 -ovc raw 
-noskip -vc mpeg12 -vf scale,format=i420 -forcedsubsonly -nosound -mc 0 
-lavdopts threads=8 -really-quiet -fps 25 -aspect 1.7775:1 -of rawvideo 
-o - \
| ivfenc --passes=1 --pass=1 --target-bitrate=1500 --width=720 
--height=576 --timebase=1/25 --i420 - "D:\Encoding Temp\Title_1_1-8.vp8"

Ivfenc complains that the output is not in Y4M format. I have to claim 
utter ignorance here but I am told that -of rawvideo does not produce a 
y4m skeleton whatever that is.

Do you know how to talk it into this?

/re