The filter allows you to choose the desired channel layout (mono, stereo, 5.1, etc) and the sample rate. You can use the anullsrc filter to make a silent audio stream. See FFmpeg Wiki: Audio Channels for more info. Mix audio from video.mkv and audio.m4a using the amerge filter: ffmpeg -i video.mkv -i audio.m4a -filter_complex "amerge=inputs=2" -map 0:v -map "" -c:v copy -ac 2 -shortest output.mkv Mixing/combining two audio inputs into one The -shortest option will make the output the same duration as the shortest input.įfmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv.If you want to re-encode video and audio then remove -c:v copy / -c copy.If your input audio format is compatible with the output format then change -c:v copy to -c copy to stream copy both the video and audio.Quality is preserved and the process is fast. This example uses -c:v copy to stream copy (mux) the video.By default FFMPEG will be installed into C:Program FilesFFmpeg for Audacity 5. You can ignore the 'unknown publisher' warning. The -map option allows you to manually select streams / tracks. Extract and run the installer (for example, FFmpeg5.0.0forAudacityonWindowsx8664.exe).Mix music and video ffmpeg -i musicshort.wav -i movie.avi final_video.aviįfmpeg -i video.mp4 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4 Truncate to fit video ffmpeg -i music.wav -ss 0 -t 37 musicshort.wav Mp3 music to wav ffmpeg -i music.mp3 music.wav FFmpeg import/export library Allows Audacity to import and export many additional audio formats such as AC3, AMR(NB), M4A and WMA, and to import audio.
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