+- Kodi Community Forum (https://forum.kodi.tv)
+-- Forum: Discussions (https://forum.kodi.tv/forumdisplay.php?fid=222)
+--- Forum: Hardware (https://forum.kodi.tv/forumdisplay.php?fid=112)
+--- Thread: RAM and CPU performance effects on HD at "low-res"? (/showthread.php?tid=54631)
RAM and CPU performance effects on HD at "low-res"? - xbmcbubba - 2009-07-14
This question relates to LIVE (couldn't change the title...)
Probably like quite a few people I've got quite a few .MKV 720/1080 HD media files, but my Plasma TV is just 480p.
My basic Athlon 3200+ system with a Nforce 430/GeForce 6150 board can play the MKV's but they do stutter occasionally in very complex/busy scenes.
Firstly, is there any less CPU load when downsampling HD playback to 480p? (playback resolution does not seem to have a major impact, as far as I can tell...)
With respect to playback performance, would a dual-core Athlon X2, of the same actual CPU speed (2GHz) as a Venice-based 3200+ help playback?
Also, how much RAM is actually required for XBMC live? Is there any point going over 1GB? Any performance gains with 2GB, 2.5GB, 3GB?
Thanks.
- jmarshall - 2009-07-14
To answer your first question, there's little to no decrease in CPU when downsampling - you still have to decode the video. Some decreases I believe *might* be possible as some codecs have the ability to do half-sized decoding - we currently do this for anything larger than a certain pixel rate for the xbox only. See CDVDFactoryCodec::CreateVideoCodec if you wish to try it out for yourself.
Scaling is done on the GPU, so that side of it doesn't matter much.
Cheers,
Jonathan