Cannot upload video to iTunesConnect: The frame rate of your app video preview is too high

Question

I made an App Store preview video using QuickTime player on OS X Yosemite.
When I try to upload the video to iTunesConnect, I get an error message:

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Answer 1

I have followed the following steps :

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

then

brew install ffmpeg

then used the following command :

/usr/local/Cellar/ffmpeg/3.1.3/bin/ffmpeg -i SpeechToText_usage.mov  -qscale 0 -r 24 -y speechtotext_framerate_changed.mov

It worked well!