Hallo > 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). BTW: PAL Full size is 720x576
> After playing a bit with libjpeg and libjpeg-mmx, I got at best 13fps for > encoding only (no write operation to disk). This leads me to 2 questions. > > 1) I have absolutely no idea if 50fps is very high or quite reasonable, and I > can't find many benchmarks of libjpeg and other open-source jpeg libraries, > so I'd like to know if one of you have more experience with MJPEG encoding > performance and could share his/her experience with me. Encoding in realtime is alreaddy extrem fast for the home equipment. If you need more speed take a lool that the mjpeg howto section "SMP and distributed Encoding" I think you will have to use one the things described to speed up things. BTW: If you use rsh buffer might help. > 2) I get very similar results using libjpeg-mmx and libjpeg on a P3-800 (both > optimized for i686). Is this normal ? I would have expected libjpeg-mmx to be > faster. 13fps is alreaddy a niche value. If you use filter and scaling the value will drop down. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
