Preliminary results seem okay. I had to pick a couple options from --preset faster. On my first test video, with deblocking from mplayer, I come closer to my time limit for a 60 minute recording for 1080i to 720p, but according to metrics, and perceptible quality all looks to be okay.
old:
Code:
x264 [info]: SSIM Mean Y:0.9863154
x264 [info]: PSNR Mean Y:46.807 U:50.211 V:51.402 Avg:47.680 Global:46.693 kb/s:5054.81
real 58m52.206s
new:
Code:
x264 [info]: SSIM Mean Y:0.9880604
x264 [info]: PSNR Mean Y:47.307 U:51.002 V:52.043 Avg:48.217 Global:47.523 kb/s:3704.70
real 59m36.614s
Given the file size difference, the change is fairly dramatic.
Now please correctly my thinking here as I'm finding it hard to find information on why weighted P frames was introduced recently. Some searches I've tried don't reveal much for me unfortunately, but it's is supposed to help fades out, correct? As I'm dealing with sources that tend to need a fair amount of deblocking on scene changes and fades (to black or crosses) and especially those scene changes, the benefits of having weightp on would then be lost (if memory serves). I chose to turn it off over --mixed-refs to help speed up encoding. Is this wise?
I still need to test the combination of settings with other sources/channels, though a fairly noticeable bump in visible quality while droping the bitrate by ~25% is kind of awesome. This is about 50% less bits than when I originally started
