#10532: Color changes at w => 1280, h >= 578 with libplacebo filter on rgb
source
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Reporter: nicol | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avfilter
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by nicol):
Adding itrc=srgb and fast=1 in the colorspace filter first gave the same
look as resized with the scale filter.
% ffmpeg -f lavfi -i colorchart=d=2 -vf
scale=w=1280:h=576:flags=lanczos,setsar=1 -crf 18 -pix_fmt yuv420p
-color_primaries bt709 -color_trc bt709 -colorspace bt709 -bsf:v
h264_metadata=colour_primaries=1:transfer_characteristics=1:matrix_coefficients=1
-color_range tv colorchart_scale_w1280.mp4
% ffmpeg -hwaccel_output_format vulkan -init_hw_device vulkan=vk
-filter_hw_device vk -f lavfi -i colorchart=d=2 -vf
hwupload,libplacebo=inputs=1:w=1280:h=576:upscaler=lanczos:format=yuv420p:range=tv,hwdownload,format=yuv420p
-crf 18 -pix_fmt yuv420p -color_primaries bt709 -color_trc bt709
-colorspace bt709 -bsf:v
h264_metadata=colour_primaries=1:transfer_characteristics=1:matrix_coefficients=1
-color_range tv colorchart_libplacebo_w1280.mp4
% ffmpeg -hwaccel_output_format vulkan -init_hw_device vulkan=vk
-filter_hw_device vk -f lavfi -i colorchart=d=2 -vf
colorspace=all=bt709:iprimaries=bt709:itrc=srgb:ispace=bt709:fast=1,hwupload,libplacebo=inputs=1:w=1280:h=576:upscaler=lanczos:format=yuv420p:range=tv,hwdownload,format=yuv420p
-crf 18 -pix_fmt yuv420p -color_primaries bt709 -color_trc bt709
-colorspace bt709 -bsf:v
h264_metadata=colour_primaries=1:transfer_characteristics=1:matrix_coefficients=1
-color_range tv colorchart_colorspace_libplacebo_w1280.mp4
Looks same chrome, edge and firefox.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10532#comment:3>
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