[mythtv-users] transcoding HD material to ease playback
jdc at uwo.ca
Fri Jan 11 14:10:54 UTC 2008
I've got a frontend/backend that is just barely able to play some HD
material: it's a 32-bit single-core mobile Athlon at 1.9GHz, with an
FX5200 video card. I was surprised that it can play HD material at all,
but it does fine on most of the sample clips I've downloaded, using
60-80% cpu. (I'm not using xvmc.) However, in a few cases it is not
able to play the HD sample. So I thought that I could transcode such
material into a format that requires less cpu to play:
1) The most obvious thing is to do the scaling ahead of time. My
HDTV has non-square pixels, so almost all material needs scaling,
and I'm guessing that this will help a lot. Or does the video card
do all of that work??
2) I wonder if lowering the bitrate a bit might help?
3) What codec should I use? I'm not too concerned about disk space,
as these are just short clips I'm playing with to see how my HDTV
Comments, and even specific command lines, are welcome.
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