ffmpeg common commands

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1 Trim audio file using start and stop times ffmpeg -i file.mkv -ss 20 -to 40 -c copy file-2.mkv ffmpeg -i file.mkv -ss 00:00:20 -to 00:00:40 -c copy file-2.mkv This should create a copy (file-2.mkv) of file.mkv from the 20 second mark to the 40 second mark. concatenate two mp3 files ffmpeg -i "concat:file…