Here is a list of all files with brief descriptions:

AbstractSession.h
AbstractSession.m
ArchDetect.h
ArchDetect.m
AtomicLong.h
AtomicLong.m
Chapter.h
Chapter.m
FFmpegKit.h
FFmpegKit.m
ffmpegkit_exception.h
ffmpegkit_exception.m
FFmpegKitConfig.h
FFmpegKitConfig.m
FFmpegSession.h
FFmpegSession.m
FFmpegSessionCompleteCallback.h
FFprobeKit.h
FFprobeKit.m
FFprobeSession.h
FFprobeSession.m
FFprobeSessionCompleteCallback.h
fftools_cmdutils.c
fftools_cmdutils.h
fftools_ffmpeg.c
fftools_ffmpeg.h
fftools_ffmpeg_demux.c
fftools_ffmpeg_filter.c
fftools_ffmpeg_hw.c
fftools_ffmpeg_mux.c
fftools_ffmpeg_mux.h
fftools_ffmpeg_mux_init.c
fftools_ffmpeg_opt.c
fftools_ffprobe.c
fftools_fopen_utf8.h
fftools_objpool.c
fftools_objpool.h
fftools_opt_common.c
fftools_opt_common.h
fftools_sync_queue.c
fftools_sync_queue.h
fftools_thread_queue.c
fftools_thread_queue.h
Level.h
Log.h
Log.m
LogCallback.h
LogRedirectionStrategy.h
MediaInformation.h
MediaInformation.m
MediaInformationJsonParser.h
MediaInformationJsonParser.m
MediaInformationSession.h
MediaInformationSession.m
MediaInformationSessionCompleteCallback.h
Packages.h
Packages.m
ReturnCode.h
ReturnCode.m
Session.h
SessionState.h
Statistics.h
Statistics.m
StatisticsCallback.h
StreamInformation.h
StreamInformation.m