[mythtv-users] transcoding HD material to ease playback

Michelle Dupuis support at ocg.ca
Fri Jan 11 14:40:02 UTC 2008

Can you tell me where you found sample HD content?  I'm looking for
something to test my home theatre but I don't have BlueRay yet.. 

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org 
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Dan Christensen
> Sent: Friday, January 11, 2008 9:11 AM
> To: Myth TV Users List
> Subject: [mythtv-users] transcoding HD material to ease playback
> 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 looks.
> Comments, and even specific command lines, are welcome.
> Thanks,
> Dan
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