video captured from iphone gets rotated when converted to .mp4 using ffmpeg

Question

When I try to upload videos captured from my iPhone in my app, the server performs a conversion from .mov to .mp4 so that it can be played in other platforms. However the pr

Answer 1

Although the topic is old. Hope this will help some one:

Get ffmpeg latest version : https://www.ffmpeg.org/download.html

The command that worked for me (to flip 180 degrees):

ffmpeg -noautorotate -i input.mp4 -filter:v "rotate=PI" output.mp4

When the degrees are determined by -filter:v "PI/180*degrees"

for example -filter:v "45*PI/180" for 45 degrees

A nice explanation is here https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg