Is it possible that the hi-res matrix does not provide the best image quality? My goal is to obtain the highest image quality possible, while the MPEG2 stream remains compatible with as many DVD players as possible.
Using mjpegtools-1.9.0-rc2 Source is fairly new DV camcorder, but in low light so there's some noise. The test scene is in low light. Typical command line flags are: mpeg2enc -v 0 -I 1 -f 8 -b 8000 -F 4 -n n -a 3 -o "kids_new_home-2007.11.03_21-39-28.m2v" -c -q 5 -4 1 -2 1 -s -D 10 -H -R 2 -M 2 I compared hi-res with a custom matrix shown below. In both cases, mplex says average bitrate is around 5k and max bitrate is around 8k. Average and max are closer together with the custom matrix, yet slightly further apart with hi-res. With hi-res I notice more artifacts, especially in difficult areas (text in a book has "hair" around letters). The custom matrix looks cleaner, fewer artifacts. This is the custom matrix (suggested by Steven Schultz a while ago): # High resolution INTRA table 8,16,18,20,24,25,26,30 16,16,20,23,25,26,30,30 18,20,22,24,26,28,29,31 20,21,23,24,26,28,31,31 21,23,24,25,28,30,30,33 23,24,25,28,30,30,33,36 24,25,26,29,29,31,34,38 25,26,28,29,31,34,38,42 # TMPEGEnc NON-INTRA table 16,17,18,19,20,21,22,23 17,18,19,20,21,22,23,24 18,19,20,21,22,23,24,25 19,20,21,22,23,24,26,27 20,21,22,23,25,26,27,28 21,22,23,24,26,27,28,30 22,23,24,26,27,28,30,31 23,24,25,27,28,30,31,33 -- Florin Andrei http://florin.myip.org/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
