[FFmpeg-user] feature request: better filter error messages

[Roger Pack]

Hello.
I notice with this line:

ffmpeg -i sintel.mpg -an -filter_complex "[0] scale=1000:1000,split=2
[a] [b]" -y sintel.avi sintel2.avi

I get this error message:

Output pad "output0" for the filter "Parsed_split_1" of type "split"
not connected to any destination

feature request:

slightly more friendlier error message, like:

Output pad "output0" ("a") for the filter "Parsed_split_1" of type
"split" not connected to any destination

or something like that.
Thanks!
-r