[MPlayer-users] Y4m

[Rolf Ernst]

On 6/21/2010 10:09 AM, Giorgio wrote:
> 2010/6/21 Rolf Ernst<rolf.ernst at silverlightning.org>:
>    
>> 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?
>>      
> I'm not sure this can help you with what you want to do, but have you
> tried something like this?:
>
> $ mkfifo -m 660 stream_fifo.yuv
> $ mplayer -vo yuv4mpeg:file=stream_fifo.yuv -nosound -benchmark<inputfile>
>
> and now, on a second terminal:
>
> $ ivfenc<options>  stream_fifo.yuv outfile.vp8
>
> Regards,
>
> Giorgio Vazzana
>    

That would be nice if named pipes worked on Windows ;-)