I have 2 similar videos created on the same mobile. The first one can be downloaded here. If I'm using the following command the result is correctly rotated by 90 degrees:
ffmpeg -i 20180114_193135.mp4 -vf "transpose=clock" -r 30 -acodec copy 20180114_193135_2.mp4
But if I'm using the same command for the second video it is rotated by 180 degrees instead 90:
ffmpeg -i 20180115_111730.mp4 -vf "transpose=clock" -r 30 -acodec copy 20180115_111730_2.mp4
Can somebody explain, why? I can not rotate the second video with ffmpeg.