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ffmpeg-tests

Full range vs TV Range

Comparing full range encoding vs. tv range, but also yuv420p vs. yuvj420p. We believe that this is well supported on web browsers, and dont see a downside to it. There may be cases where other applications do not read it. The code to generate these files is here. Full screen view is here

Test-1: Greyramp




Test-2: Radial gradent









Test-3: Marcie




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Test-1: Greyramp

Source png file

Normal encode

Using the PNG greyramp, with the normal "TV" out range of 16-235, and using yuv420p encoding.

ffmpeg -y -loop 1 -i ./greyramp-fulltv/greyscale-raw.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=tv:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/greyscale-tv.mp4

Full range encoding.

Greyramp encoded using out_range=full yuv420p encoding, here we also set color_range=2 to let the decoder know to process it correctly.

ffmpeg -y -loop 1 -i ./greyramp-fulltv/greyscale-raw.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range pc -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/greyscale-full.mp4

Test-2: Radial gradent

Source png file

This is a less forgiving test image

Normal encode

Using the radial gradent with normal yuv420p encoding and yuv420p.

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=tv:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/radialgrad-tv.mp4

Full range encoding.

Using the full range yuv420p encoding with color_range=2

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range pc -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/radialgrad-full.mp4

Alternate full range encoding

This is an older alternative to full-range encoding, that ffmpeg is currently deprecating.

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuvj420p -qscale:v 1 -color_range pc -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/radialgrad-fullj.mp4

Using full range without color_range flag

This is what happens if you specify full range without the color_range flag (color_range=0). DONT DO THIS!

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range unknown -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/radialgrad-full0.mp4

Full range with yuv444 (chrome only)

This is testing yuv444p but still 8-bit, this will only work on chrome.

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv444p -qscale:v 1 -color_range pc -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/radialgrad-full444.mp4

10-bit encoding, tv-range (chrome only)

This is testing 10-bit encoding, yuv444p10le

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -c:v libx264 -t 5 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625:fast=1" ./greyramp-fulltv/radialgrad-raw-10bit.mp4

This is using RGB encoding

libx264rgb 8-bit mp4 (not supported)

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -c:v libx264rgb -t 5 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" ./greyramp-fulltv/radialgrad-raw-rgb.mp4

Test-3: Marcie

Source png file

ffmpeg -y -loop 1 -i ../sourceimages/radialgrad.png -c:v libx264rgb -t 5 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" ./greyramp-fulltv/radialgrad-raw-rgb.mp4

Normal encoding

marcie out_range=tv -pix_fmt yuv420p 16-235 range

ffmpeg -y -loop 1 -i ../sourceimages/Digital_LAD_raw.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=tv:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/marcie-tv.mp4

Full Range

ffmpeg -y -loop 1 -i ../sourceimages/Digital_LAD_raw.png -sws_flags spline+accurate_rnd+full_chroma_int -vf "scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709" -c:v libx264 -t 5 -pix_fmt yuv420p -qscale:v 1 -color_range pc -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 ./greyramp-fulltv/marcie-full.mp4