Default ffmpeg codec when nothing is specified
问题 If I import a file to use with ffmpeg but dont specify anything about the codecs of any of the streams, will ffmpeg do anything? Is the default action to just copy the codecs? Or will ffmpeg encode the input file using some default codec? Would the following two commands be the same? Or will the second re-encode and take ages? ffmpeg -i input.mkv -c:v copy -c:a copy output.mp4 ffmpeg -i input.mkv output.mp4 回答1: If I import a file to use with ffmpeg but dont specify anything about the codecs