videoconvert gamma-mode=remap destroys alpha channel in RGBA>AYUV conversion
gst-launch-1.0 https://upload.wikimedia.org/wikipedia/commons/e/e9/Hue_alpha_falloff.png \
! decodebin ! imagefreeze ! videoconvert gamma-mode=remap \
! video/x-raw,format=AYUV ! compositor background=checker ! video/x-raw,format=AYUV \
! videoconvert ! xvimagesink
Expected output: A smooth transition from rainbow to checkers, as without gamma-mode=remap
.
Actual output: A sudden cut from rainbow to checkers.
GStreamer 1.18.4, Arch Linux.