(I am not sure if I am properly subscribed to this list yet. I have not received a confirmation email).
On the 20th I reported that I was having problems limiting the bit rate using gentoo's 1.9.0_rc4 ebuild. Bernhard pointed out that I should be using 1.9.0. Since gentoo doesn't have an ebuild for that I fabricated one which looks like it downloaded http://distfiles.gentoo.org/distfiles/mjpegtools-1.9.0.tar.gz and installed. I recompiled gstreamer-plugins-bad. It did not solve the problem. The bit rate of the generated video was still unreasonably high. With help from the gstreamer IRC channel I was able to write a YUV file so I could test with the mpeg2enc command stand-alone. gst-launch-0.10 -v filesrc location=/var/tmp/The\ Drinky\ Crow\ Show\ -\ Tunnel\ Girls.mpeg ! decodebin name=db ! queue ! videoscale ! video/x-raw-yuv, width=352, height=480, pixel-aspect-ratio=1920/1056 ! y4menc ! filesink location=/homes4/thoth/drinky-crow/x.yuv db.! fakesink silent=true mpeg2enc -a 2 -b 3180 -g 15 -G 15 -s -R 2 /homes4/thoth/drinky-crow/x.yuv -o /homes4/thoth/drinky-crow/x.m2v Here are the file sizes: -rw-r--r-- 1 thoth thoth 1657828416 Mar 27 12:13 x.m2v -rw-r--r-- 1 thoth thoth 6812375076 Mar 27 11:41 x.yuv Both files play in mplayer, but the .m2v doesn't have the correct aspect ratio (-a 2 isn't being honored, and the sequence_header.aspect_ratio_information contains a 12 instead). Since I started with a 15-minute recording, I calculate the x.m2v file as averaging out to almost 15 Mbit/s. This seems inconsistent with the -b 3180 argument to mpeg2enc. I can provide the 6G .yuv file to any brave soul willing to attempt to reproduce my problem. I'm just not sure where I could host it. As for what I used to produce graphs of bit rate, I have an in-house tool I wrote. Unfortunately it only works on single-stream PES streams at the moment, so I would have to make some changes to have it graph a .m2v file that has not been through my PES wrapper gstreamer plugin. ------------------------------------------------------------------------------ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
