FFMPEG's fftools (ffmpeg, ffprobe) rearranged as a thread-safe library for use in (Dart) FFI
Notes
- Replace the default config.h with the one when you built ffmpeg to get all the metadata to match.
- The design is for
ffmpeg_execute_with_callbacksandffprobe_execute_with_callbacksto be synchronous/blocking and issue their callbacks on the same thread.