View Single Post
Old 21st April 2018, 17:08   #57  |  Link
augman000
Registered User
 
Join Date: Jul 2005
Posts: 42
Quote:
Originally Posted by Selur View Post
Main show stoppers for me with xvc are atm.
a. no decoding through libav/ffmpeg
b. terribly slow encoding
I do agree regarding the lack of ffmepg integration. But, for speed, with lower resolutions at leaast (haven't tested higher yet), it isn't so bad for the quality it produces.

Here is a quick test on my i7-3770k, Win 7 x64 PC of a 10 second, 428x240 clip using Timer 3.01 from Igor Pavlov (author of 7-Zip) for accurate timings:
Code:
PSNR       SSIM      TIME      CODEC / OPTIONS
================================================================
44.845179  0.983561  252.955s  libaom-av1 -b:v 100K -cpu-used 4
46.537460  0.988025  334.294s  xvcenc -qp 25 -speed-mode 2
45.024133  0.983995  444.758s  libaom-av1 -b:v 100K -cpu-used 3
And here is the same clip at 480p (854x480):
Code:
PSNR       SSIM      TIME      CODEC / OPTIONS
================================================================
47.507486  0.990071  1179.726  libaom-av1 -b:v 300K -cpu-used 4
47.905909  0.991473  1237.431  xvcenc -qp 25 -speed-mode 2
47.662076  0.990272  1939.154  libaom-av1 -b:v 300K -cpu-used 3
Obviously this is just one 10s clip at a very low resolution. But for my me, these results are pretty good.

Last edited by augman000; 22nd April 2018 at 01:24.
augman000 is offline   Reply With Quote