Is there a way of importing video filters into Avidemux, and if so, how should I go about doing it?
You mean - add some filter.dll not from the avidemux filter set?
AFAIK external filters have to be "avidemux filters".
Many of these filters are of course ported versions of the ones developed for other open spource programs (like avisynth).
I presume the filter.dll are also not exchangeable between avidemux 2.5 and 2.6.
I know this is the case for filters with time dependencies (why 2.6 has fewer filters).
If you want to be sneaky, you can use all avisynth scripts and filters via the avsproxy interface on avidemux.
Opens up lots lots of more complex video manipulation (!!chromashift, fancy deinterlacing!!).
I was just asking in case I want or need to add filters for some reason.
On linux you can use avisynth dll through avisynth loader + wine
Never tested it much
There is also AvxSynth, an Avisynth port for linux.
It probably won't work as a frame server to avidemux via avsproxy.
Not much of a Linux user myself, but it seems interesting for linux based video processing.