Add rotate video option

[VGumbakis]

[NuxRo]

I've just installed the app today in the hope it did rotations, alas it doesn't. Sometimes I end up with videos with wrong orientation for some reason.

Is it just a case of calling ffmpeg with the right parameters?

[brarcher]

The the app is basically a wrapper for ffmpeg, it is often "just a case of calling ffmpeg with the right parameters" (:

My understanding is the following would need to be done to get rotation working:

• Determine arguments for ffmpeg to rotate video
• Add UI options
  • Determine if there are limits on what rotations can be accepted. 90/180/270 degrees, or arbitrary?
• Determine how to rotate the preview
  • The preview function will likely need to be redone, as it currently uses a built-in VideoView that only plays a given video. It is currently used to play certain parts of the video to account for cutting the video.
• Add an option to the app's intent interface so that other apps can also request videos be converted with rotation
• Add automated tests to cover video rotation

[NuxRo]

Ok, sounds like a big job :)