I find it very cool that avidemux can cut mp4 videos from mobile phone very fast in copy mode! But there seems to be a flaw with the rotation flag in the video. I have some videos where the phone had been turned when recording (90°, 180°, 270°). When I look at those in windows-mediaplayer (win10), they are displayed like they should: floor at the bottom sky at the top (there seems to be kind of flag that the phone sets in the movie, to enable an auto rotation by player software). When I look at those in avidemux, they are displayed wrongly (floor at the top e.g.), when I cut them and save to a new file, the file is displayed wrongly in every player software. I know I could add a filter for rotation, but then it needs to be reencoded (not copy mode), which takes longer and could lead to quality loss.
Is there a way to overcome this? Or could you implement an improvement, so that the flag is maintained in the output file?
Thank you anyway for your great software!