I'm glad to see I'm not the only one that has seen this happen. I've been trying to find another clip that has an obvious enough spot where this happens with an R value of 0 but haven't found a scene that looks nearly as bad as the clip I initially saw it on - and I'd removed the pre-mpeg2enc file :-( I did find 1 scene that seems to exhibit it just a little bit. It'll take me a while to grab just a small part though...it is about an hour into a 2 hour clip, recovered in nuv format...which of course doesn't have navigation headers :-)
It most resembles trying to encode something with a lower bitrate - as if using -R 0 is messing with the bitrate calculations or something. Although the scene I had didn't have much motion at all, it did have a lot of detail in the scene itself. Anyway...still trying to put together a short clip that produces the problem for Steven. -- Ray On Fri, 30 Jan 2004 08:05:18 +0100 > > Apparently, this is almost solved by setting -R 2. Thanks to Ray! > > > HI! > > > > I have made some tests encoding an NTSC AVI (Xvid) to MPEG2 with > > transcode/mpeg2enc. > > > > If I use -q 2 or -q 3, I get pulsating (every second or so) block > > artefacts in the background, which I get not with -q 4. > > > > I have an example to download and would be glad to hear comments: > > http://www.boerkel.de/q.zip > > > > Please look at the upper left corner of the picture (you may have to > > zoom a bit). > > > > I have used: > > -v 0 -I 0 -f 8 -b 5000 -F 4 -n n -p -a 2 -o "out.m2v" -q 3 -K tmpgenc > > > > Software versions: > > transcode 0.6.12, mjpegtools .93 (RC 4), xvidcore 1.0b3. > > > > Thanks! > > > > Thomas > > > > ------------------------------------------------------- > The SF.Net email is sponsored by EclipseCon 2004 > Premiere Conference on Open Tools Development and Integration > See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. > http://www.eclipsecon.org/osdn > _______________________________________________ > Mjpeg-users mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/mjpeg-users ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
