H.264 and VC-1 decoders? [Archive]

Joniii

29th September 2007, 06:49

I hope this goes in the right forum. I was wondering why I get so bad performance decoding VC-1 1080p video? Decoding 1080p with MPEG2 plays fine on my 64 3200+ with FFDShows MPEG2 codec (other codecs gives bad stuttering and video is unwatchable). Playing VC-1 1080p video has bad stuttering so is there any decoders that could give slightly better performance?

With my friends Core 2 Duo 6400 and GF8800GTS, 1,5 hour 35 GB 1080p video (MPEG2, H.264 and VC-1) played smoothly. Does graphics card have anything to do with it, or do these only require raw processor power?

Sharktooth

29th September 2007, 17:04

VC-1 and h.264 are more "heavy" to decode.
If you're using the MS VC-1 decoder then yeah, it has crappy performance.
For what concerns h.264, get CoreAVC.

diogen

29th September 2007, 18:15

I hope this goes in the right forum. I was wondering why I get so bad performance decoding VC-1 1080p video? Decoding 1080p with MPEG2 plays fine on my 64 3200+ with FFDShows MPEG2 codec (other codecs gives bad stuttering and video is unwatchable). Playing VC-1 1080p video has bad stuttering so is there any decoders that could give slightly better performance?With this CPU and without GPU assistance (using FFDSHOW disables it) you probably won't be able to play VC-1 1080p material of any significant bitrate (what is the source of your video?).
With my friends Core 2 Duo 6400 and GF8800GTS, 1,5 hour 35 GB 1080p video (MPEG2, H.264 and VC-1) played smoothly. Does graphics card have anything to do with it, or do these only require raw processor power?If he uses PureVideo HD and a player capable of utilising it - this pair CPU+GPU should so the job easy...

Diogen.

_xxl

29th September 2007, 18:27

For h.264 1080p videos you need a dualcore CPU.
http://forum.doom9.org/showthread.php?p=1048759#post1048759
This version uses a new multithreading method for all x264 encodes.

Joniii

3rd October 2007, 18:37

I bought core 2 duo 6400, I'll upgrade my Media Center PC with it. It will be interesting to see if it's enough to play VC-1 and H.264 without new GPU.

zambelli

11th October 2007, 11:40

Using DXVA for VC-1 decoding assistance is certainly recommended. Pretty much any Nvidia card since the 6xxx series supports VC-1 decoding in both XP and Vista. ATI support has been limited to VC-1 Simple/Main (aka WMV3), while other GPU IHVs like S3 and Intel have been slowly coming up to speed but mostly for just Vista.