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Old 4th October 2009, 00:33   #1310  |  Link
darcmage
Registered User
 
Join Date: Nov 2006
Posts: 9
Just got the license today and I've been trying a few things out. I've noticed some strange things that hopefully someone can help me out with.

System:
Q9400
2GB Ram
Nvidia 9800GT (191.03)
Windows 7 x86
Avisynth 2.58
x264.exe r1271
Source: 10min 1920x1080 interlaced clip from Hauppauge HDPVR

AVS Script
Code:
LoadPlugin("D:\DGAVCNV\DGDecodeNV.dll")
DGSource("E:\Capture\test1.dga", deinterlace=1, resize_w=1024, resize_h=576)
Batch file
Code:
x264.exe --profile high --crf 27.0 --level 4.1 --keyint 300 --min-keyint 30 
--ref 2 --direct auto --deblock -1:-1 --subme 5 --trellis 0 --partitions 
p8x8,b8x8,i4x4,i8x8 --vbv-bufsize 50000 --vbv-maxrate 50000 --thread-input --output 1.mp4 1.avs
When I first tried out the encode, I was getting nearly 17fps which was much better than the 9fps I was getting with the regular DGAVC. I noticed my CPU usage wasn't as high as it could be so after a search here, I updated to the latest x264 and saw the encoding speed jump to 26fps.

On my next test, the speed dropped back down to 17fps.

I couldn't reproduce the 26fps until I started messing with EVGA Precision (Rivatuner clone). I activated my gaming preset (650/1625/950) and the fps jumped to 49fps! All other clockspeeds would result in 20fps max.

I decided to try lowering the resolution.

AVC Script
Code:
LoadPlugin("D:\DGAVCNV\DGDecodeNV.dll")
DGSource("E:\Capture\test1.dga", deinterlace=1, resize_w=640, resize_h=368)
Batch file
Code:
x264.exe --profile high --crf 24.0 --level 3.1 --keyint 300 --min-keyint 30 
--direct auto --deblock -1:-1 --subme 6 --partitions 
p8x8,b8x8,i4x4,i8x8 --vbv-bufsize 14000 --vbv-maxrate 17500 --thread-input --output 1sd.mp4 1sd.avs
This would result in a maximum encoding speed of 49fps as well. A head-scratcher to me. I don't understand the dramatic drop in speeds with the various GPU clockspeeds and why a lower resolution wouldn't increase the encoding speed. Appreciate any help you guys can provide.
darcmage is offline