[MPlayer-users] Possible to stream/pipe -vo pgmyuv?

Steven M. Schultz sms at 2BSD.COM
Wed Jan 19 17:14:58 CET 2005

On Wed, 19 Jan 2005, Ivo wrote:

> On Wednesday 19 January 2005 10:30, RC wrote:
> > > 	Is there a way that I have overlooked to have the output of
> > > 	'-vo pnm:pgmyuv' (or for that matter -vo pnm:<any>) written as a
> > > 	stream rather than individual files?
> >
> Although I could add a suboption for that (say, 'stream'), why not use 
> yuv4mpeg for streaming to a fifo? You might want to look at mplmult.sh in 
> the TOOLS directory for an example of its usage.

	The thought was to avoid unnecessary chroma conversions.  The 
	source data is 4:1:1 (DV) and that's what the final result will
	be - so going thru yuv4mpeg would mean a 4:1:1 -> 4:2:0 -> 4:1:1
	roundtrip at least.

	A stream option in -vo pnm would end up doing, I believe,  a
	4:1:1 -> RGB -> 4:1:1 which would be less damaging to the data.

	Steven Schultz

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