bbee - vp9 quality lower than expected

[GoogleCodeExporter]

bbee is a qvga 75 fps video.

Name PSNR VP9 PSNR VP8 PSNR MP4 Size VP9  Size VP8  Size MP4  Size Target
bbee 37.78    36.96    39.29    8,515,475 8,442,943 8,406,533 8,391,250

vpxenc --cpu-used=1 -t 1 -w 320 -h 240 --fps=75/1 --target-bitrate=1000 
bbee.320x240_75Hz_P420.yuv -o bbee0.tmp.vp9.webm --fpf=bbee_vp9.fpf -p 2 
--pass=2 --codec=vp9 --good --lag-in-frames=25 --min-q=0 --max-q=63 
--end-usage=vbr --auto-alt-ref=1 --kf-max-dist=9999 --kf-min-dist=0 
--drop-frame=0 --static-thresh=0 --bias-pct=50 --minsection-pct=0 
--maxsection-pct=2000 --arnr-maxframes=7 --arnr-strength=5 --arnr-type=3 
--sharpness=0 --undershoot-pct=100 -v --psnr 

Original issue reported on code.google.com by fbarch...@google.com on 9 Sep 2013 at 7:29

[GoogleCodeExporter]

Please retest with tip of tree...  Quality improved

Original comment by jimbankoski@google.com on 17 Oct 2013 at 10:17

• Changed state: Assigned

[GoogleCodeExporter]

Stream 0 PSNR (Overall/Avg/Y/U/V) 38.498 39.353 37.957 45.487 46.010

Original comment by fbarch...@google.com on 18 Oct 2013 at 5:53

[GoogleCodeExporter]

steady progress (cpu used=0) improved.
Oct 17 PSNR 38.50
Oct 6  PSNR 38.44
Sep 20 PSNR 38.40
Mar 30 PSNR 37.67

mp4 gets PSNR 39.29
bitrate of VP9 is accurate if not slightly higher than MP4.
Whats unusual about this video is that its 75 fps, 320x240.
The motion is complex, consistent and fast (flight of the bumble bee).

The other videos where MP4 does better are simple, at least in parts, and VP9 
undershoots on bitrate; Thats not the case here.

Original comment by fbarch...@google.com on 19 Oct 2013 at 12:06

[GoogleCodeExporter]

Nov 17 PSNR 36.76
Nov 08 PSNR 37.26
Nov 01 PSNR 37.29
Oct 17 PSNR 38.50
Oct 6  PSNR 38.44
Sep 20 PSNR 38.40
Mar 30 PSNR 37.67
Quality regressed primarily due to 15% bitrate undershoot that was introduced 
on Oct 17.

Original comment by fbarch...@google.com on 23 Nov 2013 at 11:29