Doom9's Forum - View Single Post - x264 options, --qp vs --crf

ariga · 22nd February 2006, 10:39

I'm trying to get a VBR (one pass) encode. Which option should I use ?

I started with x264gui and began experimenting with the command line that it generated.

x264.exe --qp 28 --qpmax 38 --filter 0:0 --analyse all --ref 3 --me umh --subme 6 --b-rdo --bframes 1 --weightb --threads 2 --sar 1:1 --quiet -o video_qp.264 "Video.avs"

After looking at the cli help I changed qp to crf and the video looked very bad.
x264.exe --crf 28 --qpmax 38 --filter 0:0 --analyse all --ref 3 --me umh --subme 6 --b-rdo --bframes 1 --weightb --threads 2 --sar 1:1 --quiet -o video_crf.264 "Video.avs"

22nd February 2006, 10:39	#1 \| Link
ariga Learning... Join Date: Nov 2005 Location: 12.97°N, 77.56°E Posts: 135	x264 options, --qp vs --crf I'm trying to get a VBR (one pass) encode. Which option should I use ? I started with x264gui and began experimenting with the command line that it generated. x264.exe --qp 28 --qpmax 38 --filter 0:0 --analyse all --ref 3 --me umh --subme 6 --b-rdo --bframes 1 --weightb --threads 2 --sar 1:1 --quiet -o video_qp.264 "Video.avs" After looking at the cli help I changed qp to crf and the video looked very bad. x264.exe --crf 28 --qpmax 38 --filter 0:0 --analyse all --ref 3 --me umh --subme 6 --b-rdo --bframes 1 --weightb --threads 2 --sar 1:1 --quiet -o video_crf.264 "Video.avs"