Скачать или смотреть How to replace a videos' audio with an audio file | FFMPEG

Need to replace a video's entire audio track with another audio file? Well, instead of rendering out the entire video again, you can simply and almost immediately swap out the audio with just one line of text. This method is super simple but super effective.

How to install FFMPEG:    • How To: Download+Install FFMPEG on Windows...  

The command:
ffmpeg -i "PlayerParticles.mp4" -i "newaudio.aac" -vcodec copy -acodec copy -map 0:0 -map 1:0 "output.mp4"

Timestamps:
0:00 - Explanation
1:29 - Check you have FFMPEG installed
2:30 - Entering the command
5:15 - New video file with replaced audio working

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Everything in this video is my personal opinion and experience, and should not be considered professional advice. Always do your own research and make sure what you're doing is safe.