VP9 · CIQ

Constant quality, shared crf grid, per-resolution bitrate window

55 streams · 55 verified · 270 MB · manifest.csv · manifest.json

Base parameters of the group

Codec / encoder	VP9 · libvpx-vp9 -deadline good -cpu-used 2 -row-mt 1
Command	`ffmpeg -hide_banner -loglevel error -y -i SRC.y4m -frames:v 60 -pix_fmt yuv420p10le -c:v libvpx-vp9 -deadline good -cpu-used 2 -row-mt 1 -threads 8 -tile-columns 1 -g 30 -keyint_min 30 -lag-in-frames 19 -auto-alt-ref 1 -profile:v 2 -crf <q> -b:v 0 -f ivf OUT`
Points	crf 60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10 (low → high quality). Every sequence keeps only the points whose actual bitrate falls inside a window that depends on the resolution: max 25 Mbit/s (720p), 50 Mbit/s (1080p), 150 Mbit/s (4K), 400 Mbit/s (8K), min = max / 12. The other points are not published; the table marks them with “–”.
Profile	Profile 0 (8-bit) / Profile 2 (10-bit)
Level / buffer	libvpx level table (vp9_level_defs); VP9 carries no level in the bitstream, the level is a label only (CPB of 5.2–6.2 tentative in libvpx). Level = the lowest one covering size, sample rate and the actual bitrate; buffer in the name = that level's MaxCPB.
Structure	60 frames = 2 GOP × 30 (keyframes at frames 0 and 30, closed GOP), 3 B-frames with pyramid, 4:2:0, bit depth as in the source. Container: .ivf.
Verification	reference decoder vpxdec (libvpx, high bit depth) → YUV md5, cross-checked with the ffmpeg decoder md5, 60 frames, keyframes at 0 and 30, profile/level read back with ffprobe, PSNR/SSIM against the source.

Bitrates

sequence	crf 60	crf 55	crf 50	crf 45	crf 40	crf 35	crf 30	crf 25	crf 20	crf 15	crf 10
NocturneDancewindow 12.5–150 Mbit/s	–too low · 6.1	–too low · 9.9	14.6438.6 dB	21.5140.1 dB	31.6441.7 dB	46.2843.2 dB	68.8644.8 dB	98.5646.2 dB	133.4847.5 dB	–too high · 189.9	–too high
NocturneRoomHDRwindow 12.5–150 Mbit/s	–too low · 0.4	–too low · 0.8	–too low · 1.6	–too low · 3.8	–too low · 8.6	17.9342.7 dB	35.2543.9 dB	58.9144.9 dB	87.8345.9 dB	136.7847.2 dB	–too high · 252.0
ShakyBaseballwindow 12.5–150 Mbit/s	–too low · 2.1	–too low · 2.9	–too low · 4.0	–too low · 5.7	–too low · 8.7	14.1344.4 dB	24.3345.2 dB	41.5345.9 dB	64.2346.5 dB	98.9647.3 dB	–too high · 169.1
Witcher3window 4.2–50 Mbit/s	–too low · 1.1	–too low · 2.1	–too low · 3.7	6.5835.2 dB	11.4236.3 dB	19.5237.5 dB	32.1338.9 dB	48.6440.4 dB	–too high · 66.6	–too high	–too high
MissionControl1window 4.2–50 Mbit/s	–too low · 2.3	–too low · 3.3	4.4534.8 dB	6.0836.8 dB	8.2438.8 dB	10.9040.9 dB	14.2443.1 dB	17.7545.1 dB	21.1946.9 dB	25.8949.0 dB	34.1452.1 dB
RitualDancewindow 4.2–50 Mbit/s	–too low · 1.7	–too low · 2.5	–too low · 3.4	4.7740.1 dB	6.6341.7 dB	9.1043.2 dB	12.6144.7 dB	17.0246.0 dB	22.3447.1 dB	30.7448.2 dB	–too high · 51.8
MeridianShoreHDRwindow 4.2–50 Mbit/s	–too low · 0.6	–too low · 1.1	–too low · 1.8	–too low · 3.0	5.0439.0 dB	8.0940.3 dB	12.9041.5 dB	19.3142.6 dB	27.9043.6 dB	43.2244.7 dB	–too high · 85.2
DrivingPOVwindow 2.1–25 Mbit/s	–too low · 0.8	–too low · 1.3	–too low · 2.0	2.9934.5 dB	4.5536.0 dB	6.8837.5 dB	10.5639.1 dB	15.7140.5 dB	22.2641.8 dB	–too high · 34.0	–too high
TiergartenParkwaywindow 33.3–400 Mbit/s	–too low · 23.3	36.2633.8 dB	55.4435.2 dB	89.3536.5 dB	154.7537.8 dB	281.6039.2 dB	–too high · 507.1	–too high	–too high	–too high	–too high

Actual bitrate in Mbit/s (click to jump to the stream), below: PSNR-Y in dB. “–” = point outside the sequence's bitrate window, not published (the measured bitrate is shown when the point was encoded; higher-quality points after the first “too high” are not encoded).

Base parameters of the group

Bitrates

Streams