Hallo > Thank you very much for mjpegtools and for making them open source. Your > tools are the only open source tools that I've seen that are capable of > creating MPEG2 video for DVD's. There may be others, but I haven't seen > them. > > I did have a question about mpeg2enc though. It seems that mpeg2enc is > EXTREMELY slow (for me) relative to other MPEG2 encoders that I've tried > (in Microsoft Windows I'm ashamed to say). I use mplayer/mencoder to do > DiVX encoding with the lavc codec and it seems very fast. Is there > something that I'm not doing to make my encoding so slow? The command > that I'm using for the encoding is That was "problem" was dicussed alreaddy many times in the mjpeg-users mailinglist. (http://sourceforge.net/mailarchive/forum.php?forum_id=2356)
And search for "performance" That messages might be the most interresting: http://sourceforge.net/mailarchive/message.php?msg_id=6435884 > cat stream.yuv \ > | yuvscaler -n n -M BICUBIC -O SIZE_720x480 \ > | mpeg2enc -a 1 -n n-F 4 -4 1 -2 1 -B 192 -s -f 8 -o video.m2v > > It doesn't appear that the scaling (via yuvscaler) takes nearly as long as > the actual encoding. I'm wondering if there are optimizations (hardware, > etc.) that I can perform to speed up my encoding. It seems that now it > take around 2 minutes to encode a 20 second clip. I have an AMD Athlon > 1900+ with 512 MB RAM. The same DiVX encoding with mencoder and the lavc > codec takes me around 10 seconds. This seems very odd. yuvscaler should need less computing power, except you want really good quality and use BICUBIC. And you use the mpeg2enc -4 1 -2 1 Just drop the -M BICUBIC, -4 1 -2 1, and it will go faster. BTW: Does mencoder also use bicubic scaling algorithm for scaling the pictures ? auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
