Easy way to rotate video

[gelo333]

What is the easiest way to edit orientation information in a video container? Name of any app.
My phone videos randomly rotate 90 degrees. I want to remove this information so that the rotation is 0 degrees. This is an edit, and it is possible to edit some other information in the container, I would like to do it without creating a new container. If this is possible.

[davexnet]

What is the existing container and what codecs are used by the video/audio?

[gelo333]

I use MP4 and AVC/AAC.

[davexnet]

Avidemux, also Prowo's Clever FFMpeg GUI

[johns0]

If your videos are rotating on playback there's nothing you can do to fix that,to prevent your phone from rotating shot off auto-rotate in the menu you pull down

[Alwyn]

Try AVIDemux using this technique. As I note there, not guaranteed to work.

[pcspeak]

This only changes the metadata field. (can be: 90, 180, 270) Some players may not honor the changed metadata, and play the video in it's original display format.

ffmpeg.exe -display_rotation 180 -i "input.mp4" -c copy "output.mp4"

You may have to re-encode in that case.

ffmpeg.exe -i "input.mp4" -vf "transpose=0" "output.mp4"

transpose;
0 = 90° counter-clockwise and vertical flip (default)
1 = 90° clockwise
2 = 90° counter-clockwise
3 = 90° clockwise and vertical flip


The quality may change. better/worse?
This means also, maybe, using a codec.

ffmpeg.exe -i "input.mp4" -vf "transpose=0" -c:v libx264 -crf 22  "output.mp4"

Note: Subtitle will NOT rotate with the video.
Some testing will put you on the right path.
Cheers.

[videoAI]

@gelo333
try:
Lossless Cut
Lossless rotate, will keep the container as is.

[Sharc]

You can always rotate and reencode. Try something like this:

ffmpeg -i "your source" -vf "rotate='90*PI/180:ow=hypot(iw,ih):oh=ow:fillcolor=yellow',scale=w=-2:h=1080" -c:a copy -c:v libx264 -crf 20 "rotated.mp4"

Then crop the yellow canvas as needed. You may add the cropping/resizing to the commandline as well.

It rotates to any angle, just for demo or fun, try

ffmpeg -i "your source" -vf "rotate='0.5*PI*t:ow=hypot(iw,ih):oh=ow:fillcolor=yellow',scale=w=-2:h=1080,setsar=sar=1/1" -c:a copy -c:v libx264 -crf 20 "rotated.mp4"

You see why there is a yellow (or whatever color) canvas.

[gelo333]

I'd like to clarify a few things. The original video in the container has a 90 degree rotation tag. In other words, the resolution does not need to be changed.
I can rotate a video in LosslessCut without encoding. But this creates a new container and overwrites several data in the container. I want to change only the rotation data without changing the other data.

[ProWo]

Use clever FFmpeg-GUI.
Load your mp4, click main page, click various, click rotate.
Set the degrees, click rotate. Done.