User:Mjb/FFmpeg

Rotate 180 degrees

When you hold a camera phone the wrong way, it will just put a ROTATION=180 flag in the metadata, which not all players will support. To actually rotate the video, chain the hflip and vflip filters:

ffmpeg -i inputfile -vf "vflip,hflip" outputfile

The rotation flag will not be changed when you do this, so you can set it afterward (assumes video is stream # 0):

ffmpeg -i inputfile -c copy -metadata:s:v:0 rotate=0 outputfile

Or you can do both at the same time (untested):

ffmpeg -i inputfile -vf "vflip,hflip" -metadata:s:v:0 rotate=0 outputfile

Reference:

• https://stackoverflow.com/questions/3937387/rotating-videos-with-ffmpeg
• https://stackoverflow.com/questions/15335073/can-i-set-rotation-field-for-a-video-stream-with-ffmpeg