Sun Jul 15, 2018 5:21 pm
I have the same issue, I did not find a fix in Resolve.
I resolve this by using VLC to convert the file.
Open VLC, Media, Convert/Save
Add the file you want
Click Convert / Save in the bottom menu option
setting Convert,
I chose profile Video -h.264 + mp3 (mp4), click the wrench symbol
encapsulation mp4/mov
video codec
check video, and check keep original video track
Audio codec
check audio, and check keep original audio track
click save
set a destination file
click Start
This rewrote the video, using the same video quality as far as I can tell. Import the new video into Resolve and it appears normal, not sideways.