[FFmpeg-user] How to choose pixfmt output for video generator

[Martin Vignali]

Hello,

I would like to use a generator for testing
Some generator, seems to have several pix fmt supported, but can't find the
way to choose one

For example allyuv seems to support yuv444p, gbrp

./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt yuv444p -f null -
-loglevel debug
==> Output yuv444p

./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt gbrp -f null -
-loglevel debug
==> Following log, seems to output yuv444p then convert to gbrp

Thanks

Martin
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[Carl Eugen Hoyos]

Post by Martin Vignali
Hello,
I would like to use a generator for testing
Some generator, seems to have several pix fmt supported, but can't find the
way to choose one
For example allyuv seems to support yuv444p, gbrp
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt yuv444p -f null -
-loglevel debug
==> Output yuv444p
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt gbrp -f null -
-loglevel debug
==> Following log, seems to output yuv444p then convert to gbrp

$ ffmpeg -f lavfi -i allyuv=rate=5:duration=1,format=gbrp

Carl Eugen
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[Martin Vignali]

Post by Carl Eugen Hoyos

Post by Martin Vignali
Hello,
I would like to use a generator for testing
Some generator, seems to have several pix fmt supported, but can't find

the

Post by Martin Vignali
way to choose one
For example allyuv seems to support yuv444p, gbrp
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt yuv444p -f null -
-loglevel debug
==> Output yuv444p
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt gbrp -f null -
-loglevel debug
==> Following log, seems to output yuv444p then convert to gbrp

$ ffmpeg -f lavfi -i allyuv=rate=5:duration=1,format=gbrp

Thanks

Martin
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[Paul B Mahol]

Post by Martin Vignali
Hello,
I would like to use a generator for testing
Some generator, seems to have several pix fmt supported, but can't find the
way to choose one
For example allyuv seems to support yuv444p, gbrp
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt yuv444p -f null -
-loglevel debug
==> Output yuv444p
./ffmpeg -f lavfi -i allyuv=rate=5:duration=1 -pix_fmt gbrp -f null -
-loglevel debug
==> Following log, seems to output yuv444p then convert to gbrp

allyuv supports only yuv444p,

on other hand yuvtestsrc supports more yuv format, for more info consult source.
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