Hello, I'm interested in working on some filters for use within FFmpeg. The fairly recent addition of libswscale suggested to me that, unless it was hacked in, there is some sort of filter API currently part of FFmpeg. The natural progression from the layout of the code would also lead to the conception of something like "libavfilter". I thought it would be a good idea to approach such a problem by developing an LGPL library of filters for inclusion in FFmpeg but allow them to be used by other software if possible as is the intent of libavformat and libavcodec. Some brief enquiries as to the state of FFmpeg containing any sort of filter API uncovered that vhook is present for use with video filters but the same does not exist for audio. Subsequently the discussion appears to seed with one of two implementations - add "ahook" to extend for the possibility of audio filters or design some new filter API suitable for multiple applications. Which of these would be preferable? Does anyone have any suggestions for design or any significant issues for consideration? I'm willing be a code monkey for this project but I don't quite feel experienced or qualified to design such an interface and it's possible that someone more experienced with FFmpeg would be better suited to conducting this work. Kind regards, Rob
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