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AudioChannelManipulation – FFmpeg
https://trac.ffmpeg.org/wiki/AudioChannelManipulation
ffmpeg - mapping an audio file with 2 channels to a video ...
https://video.stackexchange.com/questions/18738/ffmpeg-mapping-an-audio-file-with-2-channels-to-a-video-file
Channels are conjoint tracks within a single stream, so a stereo audio WAV has one stream which contains two channels. If this is what you have, use. ffmpeg -i video -i audio -map 0:v -map 1:a output. If they are distinct streams, then the above command will still map all the streams, but for explicit specification, use.
aac - Multiple audio tracks from one source in ffmpeg ...
https://stackoverflow.com/questions/47971401/multiple-audio-tracks-from-one-source-in-ffmpeg
1 Answer1. Show activity on this post. Go with the -map option to ffmpeg. Suppose input stream 0:0 is the video stream and 0:1 is the audio stream (find out by ffmpeg -i input.mp4 ). Use -map to create one video stream and two audio streams in the output: -c:a:0 and -c:a:1 describe the codec for the two audio streams.
audio - How map_channel works in ffmpeg? - Stack …
https://stackoverflow.com/questions/63220265/how-map-channel-works-in-ffmpeg
But the syntax is very messy, so I did not figure out how to extract channels properly. This code, for the first audio track, works fine: ffmpeg -i "movie.mkv" -map_channel 0.1.0 "eng channel 1.wav" ffmpeg -i "movie.mkv" -map_channel 0.1.1 "eng channel 2.wav" ffmpeg -i "movie.mkv" -map_channel 0.1.2 "eng channel 3.wav" ffmpeg -i "movie.mkv ...
r/ffmpeg - determine whether two audio channels have ...
https://www.reddit.com/r/ffmpeg/comments/n2ljpz/determine_whether_two_audio_channels_have/
determine whether two audio channels have identical streams I was looking for a way to determine whether I should downmix a stereo recording of music to mono and I came up with this command ffmpeg -loglevel -8 -i "some-classical-music.flac" -filter_complex "[0:a]channelsplit=channel_layout=stereo[left][right]" -map "[left]" -f md5 - -map ...
How do I use ffmpeg to merge all audio streams (in a video ...
https://stackoverflow.com/questions/45824127/how-do-i-use-ffmpeg-to-merge-all-audio-streams-in-a-video-file-into-one-audio
The actual number of audio streams (there is usually one channel per stream) per file isn't known until I'm using ffmpeg. The desired outcome is to somehow have ffmpeg get the count of audio channel, use the number in the command line to amerge those into one single audio channel.
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