To add, update or remove a test file, please update the list below.
Please provide full reference and steps to generate the test file so that any people can regenerate or update the file in the future.
Generated using MSPaint like a true professional.
Lossless encoding must be used to ensure colors are perfect.
avifenc -l four-colors.png -o four-colors.avif
Lossless encoding must be used to ensure colors are perfect.
ffmpeg -i four-colors.png -lossless 1 -y four-colors.webp
ffmpeg -i four-colors.png -pix_fmt yuv420p four-colors-limited-range-420-8bpc.webp
High quality encoding must be used to ensure colors are perfect.
cp four-colors.png four-colors2.png gifski -o four-colors.gif four-colors*.png
High quality encoding must be used to ensure colors are perfect.
ffmpeg -i four-colors.png -vf "rotate=PI" four-colors2.png gifski -o four-colors-flip.gif four-colors*.png
ffmpeg -i four-colors-flip.gif -vcodec libaom-av1 -crf 16 four-colors-flip.mp4 mp4box -add-image ref:primary:tk=1:samp=1 -ab avis -ab avif -ab miaf -brand avis four-colors-flip.mp4 -out four-colors-flip.avif
avifenc -r l -d 8 -y 420 -s 0 four-colors.png four-colors-limited-range-420-8bpc.avif avifenc -r l -d 8 -y 422 -s 0 four-colors.png four-colors-limited-range-422-8bpc.avif avifenc -r l -d 8 -y 444 -s 0 four-colors.png four-colors-limited-range-444-8bpc.avif
avifenc -r f -d 10 -y 444 -s 0 --nclx 9/16/9 four-colors.png four-colors-full-range-bt2020-pq-444-10bpc.avif
Used Sqoosh.app with MozJPEG compression and RGB channels. exiftool was then used to add an orientation marker.
exiftool -Orientation=1 -n four-colors.jpg
Used Sqoosh.app with MozJPEG compression and YUV channels.
Used a custom tool to convert four-colors.avif into a .mp4 file.
sox -n -r 48000 sfx.wav synth 1 sine 480 ffmpeg -i sfx.wav -frames:a 10 -acodec libopus -b:a 96K sfx-opus.ogg
