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1. prepare your video files for Ben: Use ffmpeg2theora or ffmpeg with vp8, vorbis, mkv. When using theora, try to use a video width and height that are a multiple of 16. Currently theora decoding displays strange borders, if size is not a multiple of 16. Try to use an audio sampling rate of 44100 for the vorbis audio. If the automatic resampling of the alsa OSS emulation is triggered, quality degrades a lot. Alternatively use 'mplayer -af resample=44100:1:1' on playback. For encoding try to use libtheora 1.2 ("ptalarbvorm") which improves visual qality a lot compared to previous versions. Always encode with constant-quality *not* giving a bitrate target. Here's an example encoding command: ffmpeg2theora -o output.ogv input.avi \ -v8 -x320 -y176 \ -a0 --channels 2 --samplerate 44100 Yielding a pretty high visual quality (-v8 i.e. "80%"). Use -v6 for approximately half the bitrate with moderate quality. 2. play your files with Ben: mplayer output.ogv In case sample rate doesn't match 48000 the default will be to perform quick resampling, introducing noticeable quality degradation. Add -af resample=44100:0:1 to improve audio quality at the cost of a few percent of CPU usage. (Assumptions: the following options should be set in your ~/.mplayer/config: volume=10 vo=cvidix screenw=320 screenh=240 fs=1 ac=tremor quiet=1 )