map "" maps the video stream and -map "" maps the audio stream together into: output_file path, name and extension of the output file DiscussionĪ complex filter is needed here, in order to handle video stream and the audio stream separately.
map "" \ output_file Command syntax ffmpeg starts the command -i input_file path, name and extension of the input file -r output_fps sets the frame rate of the output file -filter_complex "setpts= input_fps/ output_fps*PTS atempo= output_fps/ input_fps" A complex filter is needed (see the discussion below).
"setpts= input_fps / output_fps *PTS \Ītempo= output_fps / input_fps " \ map "" \ output_file General command ffmpeg \ The projection or viewing speed of an audio-visual file should be changed from 24 fps (which is the cinema standard) to 25 fps (which is the “European” television standard).
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