View Single Post
Old 11th July 2018, 10:04   #5245  |  Link
mkver
Registered User
 
Join Date: May 2016
Posts: 197
Quote:
Originally Posted by MrVideo View Post
The only way to "fix" it is to recode it and adding pillar bars on the sides.
There is another way:
1. If your video is H.264, you can add a "Display Orientation SEI message" into the bitstream that contains the information that this video should be turned by 90° when viewed.
2. You can use a container that allows you to rotate the video. mp4 does so (you have to set the right "matrix"), Matroska unfortunately not.
Both these approaches have a downside: They only work on players that take this side-data into account. The second approach seems to work with ffmpeg-based players; the first seems not to do so. (I haven't seen a player that actually honours these SEI values.)
mkver is offline