[MPlayer-users] raw yuv 4:2:0 file plays too slowly.

Jonas Jensen jbj at knef.dk
Sun Feb 2 14:04:43 CET 2003

On Sun, 2003-02-02 at 02:00, Dean S. Messing wrote:
> It looks like I'm having to pull 82.9MBytes of data, sustained, from
> disk.  My system (see below) has 512 MBytes of ram, but with X up and
> lots of windows open, and KDE I guess there's not more than half of
> that available.

No ordinary disk can read so fast. Try
time cat Panslow.yuv > /dev/null
If that takes more than 9 seconds (the length of your sequence) your
disk is the bottleneck.

> If I were to spend the $$$ to put, say 2-3 gigs of memory in my system,
> could I get these raw test sequences to play in real time?
> Specifically how would I get the system to keep the sequence in memory?
> Ramdisk?

A ramdisk would probably be your best bet. Of course, the obvious and
cheap solution would be to just reencode it to mpeg1, mpeg4 or mjpeg
before playing. Or perhaps try huffyuv if it has to be absolutely

Jonas Jensen <jbj at knef.dk>

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