[MEncoder-users] How can I decode a movie->image at a specified rate ?!

[Pierre PARENT]

> 
> Pierre PARENT wrote:
> 
> >>Pierre PARENT wrote:
> >>
> >>    
> >>
> >>>Hi everybody,
> >>>
> >>>I would like to know if there is a way to obtain PPM images from a video in stdout at the video frame rate.
> >>>The goal is to show a video using amsn(or similar) by simulating a video device (/dev/video*) like it was a webcam.
> >>>
> >>>I have tried that :
> >>>-> "mencoder -really-quiet my_movie.wmv -nosound -ovc raw -vf format=rgb24 -of rawvideo -o /dev/stdout"
> >>> 
> >>>
> >>>      
> >>>
> >>-fps 25
> >>    
> >>
> >I tried this option, but it doesn't have any impact on the decoding rate.
> >  
> >
> 
> maybe you want encoding at exactly real time? not faster and not slower 
> than fps?

Yes, this is exactly what I want.My soft works like that :
1/ mencoder decodes movie to PPM at the movie original rate
2/ PPM is send to the dummy video device (/dev/video0)
3/ amsn(or gnomemeeting,...) is able to read from /dev/video0 and display the movie( at the good speed)

> 
> >>>      
> >>>
> >>stdout is seriously abused by mencoder. Don't rely on  it
> >> 
> >>    
> >>
> >yes, but it is the only way I have found to do that. If you have any suggestions to make it differently...
> >  
> >
> 
> mkfifo mypipe
> mencoder -o mypipe ... &
> 
> yourpgm < mypipe

Yes, I forgot this solution ! It could be better, thank you !!! :P

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