If you want to combine them AND re-encode the audio to AAC format, you can use this command : ffmpeg -i INPUT_FILE.mp4 -i AUDIO.wav -c:v copy -c:a aac OUTPUT_FILE.mp4
Let’s suppose our video file name is INPUT_FILE.mp4 and the audio file name is AUDIO.wav. To ensure compatibility, we recommend using MP4 or MKV as the container. Please do note that the container (file extension) must accept the video and audio codec. If you have separate audio and video file, and the video file contains no audio, you can use this command to combine them into one video file. In this code, 0.2.0 appears to be: input #0 (movie.mkv) then stream 2 (audio ger) then channel 0 (very first channel).6 Conclusion Combine separate video and audio using FFmpeg it extracts not German sound, but instead it results with the same eng channels (which also sound little louder than in previous case). ffmpeg -i "movie.mkv" -map_channel 0.2.0 "ger channel 1.wav"įfmpeg -i "movie.mkv" -map_channel 0.2.1 "ger channel 2.wav"įfmpeg -i "movie.mkv" -map_channel 0.2.2 "ger channel 3.wav"įfmpeg -i "movie.mkv" -map_channel 0.2.3 "ger channel 4.wav"įfmpeg -i "movie.mkv" -map_channel 0.2.4 "ger channel 5.wav"įfmpeg -i "movie.mkv" -map_channel 0.2.5 "ger channel 6.wav" I believe that 0.1.0 is: input #0 (movie.mkv) then stream 1 (audio eng) then channel 0 (very first channel).īut when I'm trying to extract channels from second audio track. This code, for the first audio track, works fine: ffmpeg -i "movie.mkv" -map_channel 0.1.0 "eng channel 1.wav"įfmpeg -i "movie.mkv" -map_channel 0.1.1 "eng channel 2.wav"įfmpeg -i "movie.mkv" -map_channel 0.1.2 "eng channel 3.wav"įfmpeg -i "movie.mkv" -map_channel 0.1.3 "eng channel 4.wav"įfmpeg -i "movie.mkv" -map_channel 0.1.4 "eng channel 5.wav"įfmpeg -i "movie.mkv" -map_channel 0.1.5 "eng channel 6.wav" Stream #0:2(ger): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/sīut the syntax is very messy, so I did not figure out how to extract channels properly.
Structure of "movie.mkv" file is like this: Input #0, matroska,webm, from 'movie.mkv':ĭuration: 00:40:38.08, start: 0.000000, bitrate: 21128 kb/s These audio tracks are contained in a MKV file. I need to extract channels from 5.1 audios.
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