FFMPEG Joining MP4 with Alternate MP3 Soundtrack Not Working

[pone44]

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?

[sneaker]

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.

[pone44]

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?

[ProWo]

Remux it with my clever FFmpeg-GUI
Select your video as source, select multiplex, select your mp3 as audiofile, multiplex, done