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Old 7th April 2004, 10:56   #1  |  Link
dimzon
BeHappy/MeGUI developer
 
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Join Date: Oct 2003
Location: Moscow, Russia
Posts: 1,727
MPEG-4 directshow Decoders speed competition

competitors:
XviD 1.0 RC3
DivX 5.1.1
3ivX 4.5.1
ffdshow-20030523
ffdshow-20040405
NeroDigital (NeVideo.ax 1.1.7.35) - thanx to bond and seemoredigital
dicas mpegable MPEG4 Decoder


I've got 30000frames length clip from my recent SPR backup (XviD1.0 RC3 BFRAMES=YES, GMC=NO, QPEL=NO, 576*320). It's part of beach episode (heavy motion and details). I assume fps=180 in order to decrease overall test time duration.

For each decoders listed above I create such graph into graphedit:
[Clip]->[AviSplitter]->[Decoder]->[Null Renderer]
I disable any PP into all decoders and play those graphs. When playback finished i used Windows Task Manager to estimate Decoding CPU Cost in form of CPU Time. I've got such results on my AthlonXP2000+ 512RAM WinXP Prof SP1:

mpegable ~ 200sec
ffdshow-20040405 (XviD 1.0 for decoding) ~170sec
DivX ~156sec
3ivX ~155sec
XviD ~154sec
NeroDigital ~145sec
ffdshow-20030523 (iDCT=XviD) ~104sec
ffdshow-20030523 (iDCT=simple) ~103sec
ffdshow-20040405 (iDCT=autoselect) ~94sec

Last edited by bond; 13th April 2004 at 16:21.
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