Attempting to use scale_npp filter results in "impossible to convert between formats"
|Reproduced by developer:
|Analyzed by developer:
As best as I can tell, trying to use the scale_npp filter is always resulting in an error such as the following for me:
Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto-inserted scaler 0' Error opening filters!
An example command line is
ffmpeg -i input_file.mkv -filter:v "scale_npp=w=1316:h=1080:format=same:interp_algo=lanczos" -codec:v libx264 output_file.mkv
This seems to happen regardless of what sort of input file I try. Initially was using a rgb24 color space input file, and thinking that might have been the problem tried a yuv420p input file, with the same result.
This is based upon a local build of the current git version, built under MSYS2 and which includes libnpp support.
A full log is attached.
Maybe this is user error rather than a bug? I can't see what I've done wrong though.