iOS recorded videos won’t play sound on YouTube. HOWTO fix

Starting with iOS 11, you can record your screen (and audio):

iOS “Record your screen”

Awesome feature, however when I tried to upload a video I recorded to YouTube the audio did not work.

Turns out iOS 11 records two audio tracks, the 1st one being silent 😡

You can remove the silent audio track with ffmpeg very quickly

ffmpeg -i input.mp4 -map 0:0 -map 0:2 -c:v copy -c:a copy output.mp4

If you are on macOS you can install ffmpeg by running brew install ffmpeg


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