Issue building

[sftwrngnr]

Hi,
I am attempting to build after installing the latest FFmpeg and am getting an error in filter.go
Specifically:
./filter.go:44:17: f.c.nb_inputs undefined (type *_Ctype_AVFilter has no field or method nb_inputs)
./filter.go:49:17: f.c.nb_inputs undefined (type *_Ctype_AVFilter has no field or method nb_outputs)

I'll take a look and see if I can figure out what's going on... in looking at the header, it appears that nb_inputs and nb_outputs are in the AVFilterContext structure. I will see if I can figure out the issue and submit a PR. This is with FFmpeg version 7.1. This may be related to needing V7.0 instead.

[asticode]

This is definitely coming from the ffmpeg version 👍

However this is weird that you're getting those errors on 7.1 since I've tested it and even the doc states those fields do exist on AVFilter 🤔 Are you sure you're on 7.1?