firefox/testing/web-platform/mozilla/tests/webgpu/resources

Always use getResourcePath() to get the appropriate path to these resources depending on the context (WPT, standalone, worker, etc.)

The test video files were generated with by ffmpeg cmds below:

// Generate four-colors-vp8-bt601.webm, mimeType: 'video/webm; codecs=vp8'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv four-colors-vp8-bt601.webm

// Generate four-colors-h264-bt601.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv four-colors-h264-bt601.mp4

// Generate four-colors-vp9-bt601.webm, mimeType: 'video/webm; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv four-colors-vp9-bt601.webm

// Generate four-colors-vp9-bt709.webm, mimeType: 'video/webm; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace bt709 -color_primaries bt709 -color_trc bt709 -color_range tv -vf scale=out_color_matrix=bt709:out_range=tv four-colors-vp9-bt709.webm

// Generate  four-colors-vp9-bt601.mp4, mimeType: 'video/mp4; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv four-colors-vp9-bt601.mp4

Generate video files to test rotation behaviour. Use ffmepg to rotate video content x degrees in cw direction (by using transpose) and update transform matrix in metadata through display_rotation to x degrees to apply ccw direction rotation.

H264 rotated video files are generated by ffmpeg cmds below:

// Generate four-colors-h264-bt601-rotate-90.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=2 temp.mp4
ffmpeg -display_rotation 270 -i temp.mp4 -c copy four-colors-h264-bt601-rotate-90.mp4
rm temp.mp4

// Generate four-colors-h264-bt601-rotate-180.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=2,transpose=2 temp.mp4
ffmpeg -display_rotation 180 -i temp.mp4 -c copy four-colors-h264-bt601-rotate-180.mp4
rm temp.mp4

// Generate four-colors-h264-bt601-rotate-270.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=1 temp.mp4
ffmpeg -display_rotation 90 -i temp.mp4 -c copy four-colors-h264-bt601-rotate-270.mp4
rm temp.mp4

Vp9 rotated video files are generated by ffmpeg cmds below:

// Generate four-colors-vp9-bt601-rotate-90.mp4, mimeType: 'video/mp4; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=2 temp.mp4
ffmpeg -display_rotation 270 -i temp.mp4 -c copy four-colors-vp9-bt601-rotate-90.mp4
rm temp.mp4

// Generate four-colors-vp9-bt601-rotate-180.mp4, mimeType: 'video/mp4; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=2,transpose=2 temp.mp4
ffmpeg -display_rotation 180 -i temp.mp4 -c copy four-colors-vp9-bt601-rotate-180.mp4
rm temp.mp4

// Generate four-colors-vp9-bt601-rotate-270.mp4, mimeType: 'video/mp4; codecs=vp9'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv -vf transpose=1 temp.mp4
ffmpeg -display_rotation 90 -i temp.mp4 -c copy four-colors-vp9-bt601-rotate-270.mp4
rm temp.mp4

Generate video files to test flip behaviour. Use ffmpeg to flip video content. Using display_hflip to do horizontal flip and display_vflip to do vertical flip.

H264 flip video files are generated by ffmpeg cmds below:

// Generate four-colors-h264-bt601-hflip.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv temp.mp4
ffmpeg -display_hflip -i temp.mp4 -c copy four-colors-h264-bt601-hflip.mp4
rm temp.mp4

// Generate four-colors-h264-bt601-vflip.mp4, mimeType: 'video/mp4; codecs=avc1.4d400c'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libx264 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv temp.mp4
ffmpeg -display_vflip -i temp.mp4 -c copy four-colors-h264-bt601-vflip.mp4
rm temp.mp4

Vp9 flip video files are generated by ffmpeg cmds below:

// Generate four-colors-vp9-bt601-hflip.mp4, mimeType: 'video/mp4; codecs=vp09.00.10.08'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv temp.mp4
ffmpeg -display_hflip -i temp.mp4 -c copy four-colors-vp9-bt601-hflip.mp4
rm temp.mp4

// Generate four-colors-vp9-bt601-vflip.mp4, mimeType: 'video/mp4; codecs=vp09.00.10.08'
ffmpeg.exe -loop 1 -i .\four-colors.png -c:v libvpx-vp9 -pix_fmt yuv420p -frames 50 -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m -color_range tv temp.mp4
ffmpeg -display_vflip -i temp.mp4 -c copy four-colors-vp9-bt601-vflip.mp4
rm temp.mp4

The test jpg files were generated with by exiftool cmds and other image tools in below steps:

// Generate four-colors.jpg with no orientation metadata
Use a image tool (e.g. "Paint" app on Windows) to create four-colors.jpg from four-colors.png and check with exiftool to ensure no orientation metadata been set.

// Generate jpg picture with 90 cw rotation metadata
Use a image tool (e.g. "Paint" app on Windows) to create four-colors-hard-rotate-90-ccw.jpg and check with exiftool to ensure no orientation metadata been set.
exiftool -Orientation#=6 four-colors-hard-rotate-90-ccw.jpg -o four-colors-rotate-90-cw.jpg
rm four-colors-hard-rotate-90-ccw.jpg

// Generate jpg picture with 180 cw rotation metadata
Use a image tool (e.g. "Paint" app on Windows) to create four-colors-hard-rotate-180-ccw.jpg and check with exiftool to ensure no orientation metadata been set.
exiftool -Orientation#=3 four-colors-hard-rotate-180-ccw.jpg -o four-colors-rotate-180-cw.jpg
rm four-colors-hard-rotate-180-ccw.jpg

// Generate jpg picture with 270 cw rotation metadata
Use a image tool (e.g. "Paint" app on Windows) to create four-colors-hard-rotate-270-ccw.jpg and check with exiftool to ensure no orientation metadata been set.
exiftool -Orientation#=8 four-colors-hard-rotate-270-ccw.jpg -o four-colors-rotate-270-cw.jpg
rm four-colors-hard-rotate-270-ccw.jpg