On Sun, 2010-05-16 at 12:26 +0100, Muzer wrote: > I'm trying to watch Avatar (a rip from the BD that I made myself with > makemkv) with mplayer. I have added a load of options to try to improve > the playback quality, as it was extremely jerky and stuttering before - > now it's watchable, but still not perfect. > > The command-line I use is: > > mplayer title00.mkv -channels 6 -vo vdpau -vc ffh264vdpau -lavdopts > threads=3:skiploopfilter=all:fast The lavdopts value makes little difference if you're using ffh264vdpau instead of libavcodec software decoding. Does "-demuxer lavf" make any difference (probably doesn't fix these symptoms though)? Does the A-V sync value shown on the command line stay near 0? > I have disabled compositing in kwin - that makes a difference. > > I have tried using xv instead of vdpau, and the quality is virtually the > same, which raises the question of whether vdpau is actually doing its job. > > The exact nature of the jerkiness is that it runs reasonably smoothly > for about a second, then does a little freeze in the picture and jumps - > all within about half a second. Sound remains smooth. This repeats. This > is unnoticeable during most scenes, but really distracts you from the > large, sweeping panoramic views. This sounds somewhat similar to the symptoms described in http://www.nvnews.net/vbulletin/showthread.php?t=144495 In that case using the git repo with its better VDPAU support helped. After that I've also added full support for VDPAU's frame queuing functionality; using that could help with more cases of small jerkiness. You can test it by building from source starting from git://repo.or.cz/mplayer-build.git > I am using mplayer from the Ubuntu Lucid repo - I will try the SVN if There are also binary builds of the git code for various Ubuntu versions at https://launchpad.net/~ripps818/+archive/coreavc (the repo is named after coreavc patches but you don't have to use that functionality). > I am using pure ALSA as my sound output, but with a custom plugin that > downmixes 5.1 surround to 4.0 (for my 4.0 surround system). I am pretty > sure there is no interference from pulseaudio anywhere along the line. Testing with -nosound could confirm that.
