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  1. I am trying to give an MP4 file an alternate soundtrack that is stored in an MP3 file. I tried to use the command:

    ffmpeg -i video_input.mp4 -i music.mp3 -map 0:v -map 1:a -c:v copy -c:a copy video_output-combined.mp4 -y

    The command works, but the video output file plays for about 1:20 and then the video freezes. The audio continues to play. My media player is the latest 64-bit VLC under Windows. FFMPEG is the latest Windows build.

    Is there something wrong with my command?
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  2. Is the video input longer than 1:20 and you want to let the audio end then, too? (Then use -shortest)
    Or is the video input longer? Then maybe video input is broken or you found an ffmpeg bug.
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  3. Originally Posted by sneaker View Post
    Is the video input longer than 1:20 and you want to let the audio end then, too? (Then use -shortest)
    Or is the video input longer? Then maybe video input is broken or you found an ffmpeg bug.
    FFmpeg -h says nothing about a -shortest option. Where can I read documentation about that?
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  4. Remux it with my clever FFmpeg-GUI
    Select your video as source, select multiplex, select your mp3 as audiofile, multiplex, done
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