[FFmpeg-devel] [PATCH]lavfi/extractplanes: Fix in_pixfmts

[Carl Eugen Hoyos]

Hi!

I see the following issue here with extractplanes:
If the input file has a 16bit little endian pix_fmt not supported by 
extractplanes (gbra12le), the filter system has to choose a compatible 
pix_fmt supported by the filter and chooses rgba64be here.
The extractplanes filter returns gray16le as output pix_fmt because the 
original pix_fmt was le but produces visually broken output because the 
actual filter input is be.
Attached patch works around this issue by always providing compatible 
input and output formats.
I am happy if this can be fixed differently.

Please comment, Carl Eugen
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