I have a set of movies that I created using ffmpeg. I use them for presentations in Keynote, and until today I had never had a problem. However, now when I try to drag them or import them in Keynote I am getting the message "The movie couldn't be inserted. This movie can't be added". I can see the movies using VLC and DivXPlayer, but they also fail when I try to open them with QuickTime Player. I have already generate them again, using different computers and different video extensions (mp4, m4v, etc), but the problem remains. I also downloaded a program called UniConverted to try to fix the error, but it isn't working. What is odd is that the error only appeared for the latest movies I am trying to add. The previous ones work just fine. Any help will extremely be appreciated as I am running out of time and I really need to put the movies in the presentation.

  • What changed in your setup? Any macOS or app updates recently? – IconDaemon May 28 at 11:27
  • Well, it's been a while since I made such presentation (six months ago), so perhaps there was an update I made that screwed everything, but I unfortunately I can't trace it back. – user3412058 May 29 at 12:29
  • What version of macOS are you using? Do you have any of the Apple pro apps installed? (FinalCut, Logic, etc.) Is your ffmpeg the latest build? – IconDaemon May 29 at 13:21
  • The macOS version is 10.13.6. I do not have any Apple pro apps installed. I built ffmpeg yesterday. Originally I was creating the movies using another computer with Linux, but since they kept failing I decided to install ffmpeg in my Mac and create them here to see if that helped. It didn't. – user3412058 May 29 at 17:38
  • I've used the app Wondershare Converter for video processing. You can try it free to see if it works.. – IconDaemon May 29 at 21:26

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