On Mon, 25 Aug 2003, Ray Cole wrote: > Here's the command line I used on the old one vs the new: > > Old Command: > nice mpeg2enc -f 8 -b ${aRate} -V 230 -n n -s -a 2 -g 6 -G 18 -I 0 \ > -r 24 -4 2 -2 2 -F 1 -p -v 0 -o ${aName}.m2v > > New Command: > nice mpeg2enc -f 9 -b ${aRate} -V 230 -n n -s -a 2 -g 6 -G 18 -I 0 \ > -r 24 -4 2 -2 2 -N 1.50 -Q 1.00 -v 0 -p -F 1 -o ${aName}.m2v
-N 1.5 is a bit aggressive (but is the same as the old -N though), 1.0 would achieve most of the bitrate reduction but better looking output. > I also noticed that using either -f8 or -f9 that something wasn't quite > right with some sort of timestamps. I did a 'mplayer test.m2v > -ss 15:00' for example and that really took me about 45 minutes into > themovie (maybe a little further). This worked when I encoded using > the older version of mpeg2enc, doesn't with the new. Possible to set the line length to something closer to 80 or so? That paragraph came out as a single very long line... The problem's with mplayer's seeking. Mplayer probably isn't using the timestamps but is instead assuming CBR and a fixed GOP size and positioning accordingly. With VBR and variable GOP sizes seeking is a bit trickier - it's (almost) necessary to sequentially scan the file looking for the correct timestamp. DVDs produced with the new encoder work flawlessly in standalone players whereas the older mplex/mpeg2enc did have issues in that area. Sounds like bugs in the older version interacted with mplayer to accidentally get the desired result ;) I'd have to check what the maximum GOP size is for NTSC DVDs - thought it was 15 intead of 18 but I might be misremembering that though. What's the speed of the cpu being used? The command looks ok and I'd expect somewhere around 6 frames/sec or so on a 2.xGHz system. Steven Schultz ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here:http://www.vmware.com/wl/offer/358/0 _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users