Update, I can flip my webcam using this :
LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l2convert.so cheese
That command won't work if libcamera is installed.
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Sorry, I might be take the wrong package to report, It could be
libv4l-0t64.
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https://bugs.launchpad.net/bugs/2063828
Title:
v4l-utils failed to flip upside down webca
Public bug reported:
About a year ago (June 2023) I can flip my upside down webcam using
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4lconvert.so.0 .
But now, It's no longer works. When I launch webcam app (e.g cheese or
snapshot), it's always upside down, whether I use LD_PRELOAD or not.
My machine
The out put of "v4l2-ctl -d /dev/video0 -l"
User Controls
brightness 0x00980900 (int): min=-64 max=64 step=1
default=0 value=0
contrast 0x00980901 (int): min=0 max=64 step=1
default=32 value=32
saturation 0x00980902 (int)
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