I recorded a video from an android phone and turned it from portrait to landscape within the first 5 seconds.
I noticed if I play the video in Windows Media Player - it shows up portrait then turns to a 90 degree angle on its' side. However in VLC player, it shows up in portrait and when the film rotates, the position stays fixed so the video always looks correct, I guess because VLC reads the meta data of the film for the rotation angle and adjusts automatically during playback ?
However I need to save this into the actual video... so that it "automatically" turns for other players or for YouTube etc.
I have no idea how to do this?
Edit: What I mean is that the metadata for current rotation needs to be read and a video saved using this information so that the actual video stays stable when the part in the video where the phone is rotated while filming. Does that make more sense?
Try it out by filming something with your smartphone and then rotate the phone while recording from landscape to portrait or vice versa. Save the video to your PC and play with latest VLC, it stays stable but view in Windows Player and you end up with a rotated video (either it's on the side or something)