On Sun, 9 Feb 2003, Martin Collins wrote:

> On Sun, 9 Feb 2003 10:08:17 +0100 (CET)
> [EMAIL PROTECTED] wrote:
> 
> > On Sat, 8 Feb 2003, Laurent Pinchart wrote:
> > > I've been asked today by my boss to see if I can find a way to get
> > > software MJPEG encoding for PAL-size (768x576) RGB images at a
> > > double real-time rate(50fps).
> >
> > Well, the fastest realtime encoder that I know of exists in mplayer,
> ...
> > On my Athlon XP 1800+ it can encode at >25fps
> 
> On my Athlon 1500+ encoding 672x576 PAL I get this:
> 
> lav2yuv ./mjpeg.avi | \
> mencoder - -ovc lavc -lavcopts vcodec=mjpeg -o ~/mjpeg.avi
> 38fps (interlaced)
> 
> lav2yuv ./mjpeg.avi | \
> mencoder - -ovc lavc -lavcopts vcodec=mjpeg -vop pp=md -o ~/mjpeg.avi
> 37fps (deinterlaced)

yuv2lav performs almost as good as that on my athlon XP1800+.
To eliminate decompressing overhead I use a 720x576 yuv4mpeg stream:

cat video.yuv | yuv2lav -o video.avi
39.9 fps

The resulting avi is, of course, mjpegtools compatible unlike mencoder's.
By the way, only 80% of the cpu gets used, dont know why.

Selva




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