>From "Steven M. Schultz" <[EMAIL PROTECTED]> on 18 Dec 2003: > You set the maximum bitrate and then adjust -q so that the Average > is ~10% lower than the Peak rate.
Ok. I noticed that for some chapters on the DVD, the average bitrate reported by mplex was almost 50% of the max bitrate! What does this mean? > > but it is not bad either. There are halos around letters (subtitles), > > the picture is not very sharp/clear. > > After discarding 80 to 90% of the data what did you expect? What do you mean discarding 80-90%? Suppose I set bitrate to 9000kbps and -q 8, am I still discarding 80-90%? Does the discarding part depend on the bitrate or the -q? The bitrate is infinitely variable, but I just have a handful of -q to play with (-q 6 or 7 or 8). Anything lower will make the file too big, anything higher will kill quality, right? > Sharpness/detail cost bits and with the length of video you're > attempting to put on a single CD you're almost lucky to get any > picture at all. Yeah! > What are you using to do the downscaling? 'y4mscaler' has a wide > variety of choices to choose from - some are quick but lose more > detail, others are slower but produce higher quality output. > > Something like > > y4mscaler -O preset=VCD -S option=sinc:8 I am using transcode's -Z 352x240 option to do the scaling. I didnt think I could use another scaler with transcode, can I? > Now if you could go to a 2CD set (pick a nice convenient fade to black > scene to switch discs) that would make for a much better looking VCD > (at that point a CVD would be a good choice of format). What is a CVD exactly? How can I tell mpeg2enc/mplex to produce a CVD? If my hardware player can play a VBR MPEG1 (XVCD), are the chances high that it will play a CVD? As always, thanks a lot _______________________________________________________ The FREE service that prevents junk email http://www.mailshell.com ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
