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How to mux two video/audio streams into one using …

    https://stackoverflow.com/questions/5802333/how-to-mux-two-video-audio-streams-into-one-using-ffmpeg
    Extract the audio from v1.flv and v2.flv using ffmpeg: ffmpeg -i v1.flv -vn -acodec copy v1.mp3. ffmpeg -i v2.flv -vn -acodec copy v2.mp3. Mix the audio tracks using sox, something like this (not tested): sox -M v1.mp3 v2.mp3 v3.mp3. Multiplex audio and video using ffmpeg. Try the following (also not tested):

ffmpeg add two audio streams to video - Super User

    https://superuser.com/questions/508331/ffmpeg-add-two-audio-streams-to-video
    ffmpeg -i /sdcard/video/transcode/video.avi -map 0:0,0 -i /sdcard/video/transcode/first.mp3 -map 1:0,1 -i /sdcard/video/transcode/second.mp3 -map 2:0,2 -acodec copy -vcodec py /sdcard/video/transcode/Output.avi to add two audio streams to one video file. But ffmpeg says the number of mappings should match the number of output streams.

ffmpeg : How to mux 2 Mono Audio Streams to 1 Stereo Stream?

    https://yabb.jriver.com/interact/index.php?topic=114585.0
    ffmpeg : How to mux 2 Mono Audio Streams to 1 Stereo Stream? « on: February 24, 2018, 03:57:32 pm » I have a new Canon XF400 and when recording in LPCM mode it creates a MP4 with 5 Streams (1 x X264, 4 x LPCM, 1 x Time Code).

FFMPEG convert video with multiple audio streams?

    https://video.stackexchange.com/questions/12051/ffmpeg-convert-video-with-multiple-audio-streams
    If I flipped which map comes second, that is the stream that is audible in the output. How do I mux them together so they both play? ffmpeg -i "The Bunker.avi" -map 0:0 -map 0:1 -map 0:2 -vcodec h264 -acodec:0 mp -acodec:1 mp3 TheBunkerNwMix.mp4 This is the stream mappings so I have no idea why it isn't mapping correctly?

FFmpeg to the Rescue: Muxing Audio and Video Files ...

    https://streaminglearningcenter.com/learning/ffmpeg-to-the-rescue-muxing-audio-and-video-files.html
    As before, FFmpeg converted the WAV file to AAC and produced the muxed file. So, FFmpeg seems pretty error-tolerant with this command. Of course, if you want to specify the bitrate (-b:a 128k), sample rate (-ar 48000), or channels (-ac 2, for stereo), you should specify the AAC codec (-c:a aac) as below. ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a aac -b:a 128k -ar …

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