Hi all, Not sure if this should be directed at libav-user instead, feel free to redirect me if needed.
I've read the writing_filters.txt documentation and numerous StackOverflow posts and everything indicates that in order to add your own custom filter, the Makefile in libavfilter needs to modified (and therefore the whole library be recompiled). Maybe this has been discussed before but I was wondering if there are any plans to expose a public API so that downstream users of the library could develop and inject their own "local" filters and use them inside a filter chain together with existing filters. For context, we use FFmpeg via Python bindings (PyAV) and I was able to wrap my own filter that calls a python callback (so I can use any python code to decide what to render on the frame without serializing and interfacing with c++ directly, which would significantly limit our applications and iteration speed). I had to use the "private" side of the AVFilter API (nb_inputs, nb_outputs, formats) and expose the `ff_filter_frame` function, but other than that everything works. I assume the rationale of not exposing a fully public API is to be able to iterate quicker without having to maintain backwards compatibility, but there might be other reasons. In any case, is this something that has ever been proposed or are there any plans to support extending libavfilter with custom filters without having to build it from source? Would be super useful to us! Thanks, Carlos _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
