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Subme & aq-mode
Hi all,
I'm using x264 to encode two videos (one video with low motion- head talking, and a second is a part from movie). The command line is: x264 --preset ultrafast --tune zerolatency --subme xx --aq-mode yy .
I have too questions about Subme and Aq-mode parameters:
Subme:
Encoding the video for different subme value gives:
subme Bitrate PSNR
0 5417.87 38.796
1 3807.03 39.578
2 2727.20 38.681
3 2647.04 38.750
4 2639.97 38.754
5 2648.79 38.772
6 2786.14 38.836
7 2786.14 38.836
I'm wondering why subme 2 gives the worst quality? And subme 1 improves quality!!
aq-mode :
Encoding the head talking video (low motion) shows that using aq-mode 1 or 2 reduces bitrate and quality than aq-mode 0. But encoding the part of movie (high motion) shows that aq-mode increase bitrate and improves quality than aq-mode 0. Can someone explain it to me??
Thanks for help.
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