[FFmpeg-user] Rotating an mp4 video on Windows

[Carl Eugen Hoyos]

Hi!

2016-08-08 20:08 GMT+02:00 Elie Grouchko <elie at grouchko.net>:
> The transposed video can be played back with VLC.
> With WPM I can hear the sound, but no video.

This is unexpected.
Could you test the following command lines?
$ ffmpeg -f lavfi -i testsrc -pix_fmt yuv420p -t 10 out1.mp4
$ ffmpeg -f lavfi -i testsrc,transpose=1 -pix_fmt yuv420p -t 10 out2.mp4

Please avoid top-posting here, Carl Eugen