How to rotate mp4 file

mfoley · 10-23-2018, 10:50 PM

I've been searching and testing for hours. No luck. I have a .mov file I converted to mp4 using:

Code:

ffmpeg -i "2018.10 Chair Update Video.mov" -f mp4 -vcodec copy -acodec copy output.mp4

Unfortunately, the video is rotated 90 degrees counter-clockwise. I've tried numerous things including using VLC and various ffmpeg commands including:

Code:

ffmpeg -i output.mp4 -vf "transpose=1" outputR.mp4
ffmpeg -i output.mp4 -c copy -metadata:s:v:0 rotate=90 outputR.mp4

and numerous other variations I found on the web. Nothing works. The video remains stubbornly rotate 90-counter.

This is turning out a lot more difficult than I thought. Ideas?

dc.901 · 10-24-2018, 02:45 PM

I've used handbrake in past, and it was quite good (however, I did not rotate video)
I do see there is an option to rotate:
https://www.itsupportguides.com/know...ing-handbrake/

https://www.groovypost.com/howto/con...les-transcode/

Have you tried this already?

BTW: there is also CLI option for handbrake if you do not want to use GUI:
https://handbrake.fr/docs/en/latest/...reference.html

average_user · 10-24-2018, 03:08 PM

You can rotate your monitor.
Anyway, this command you suggested worked for me:

Code:

ffmpeg -i output.mp4 -vf "transpose=1" outputR.mp4

ffmpeg version:

Code:

$ ffmpeg --version
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/doc/ffmpeg-3.2.4/html --mandir=/usr/man --disable-debug --enable-shared --disable-static --enable-gpl --enable-version3 --enable-avresample --arch=x86_64 --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libcaca --enable-libcdio --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libmp3lame --enable-opengl --enable-libopenjpeg --enable-libpulse --enable-libsmbclient --enable-libwavpack --enable-x11grab

Is ffmpeg printing some errors?

average_user · 10-24-2018, 03:12 PM

And also notice that some video players can rotate videos, for example mplayer:

Code:

mplayer -vf rotate=2 outputR.mp4

In man mplayer it says:

Code:

       rotate[=<0-7>]
              Rotates the image by 90 degrees and optionally flips it.  For values between  4-7  rotation  is  only
              done if the movie geometry is portrait and not landscape.

                 0    Rotate by 90 degrees clockwise and flip (default).

                 1    Rotate by 90 degrees clockwise.

                 2    Rotate by 90 degrees counterclockwise.

                 3    Rotate by 90 degrees counterclockwise and flip.

BW-userx · 10-24-2018, 03:35 PM

maybe convert it to mp4 first, as stated, I too use HandBrake for this.

average_user · 10-24-2018, 03:45 PM

Quote:

Originally Posted by BW-userx

maybe convert it to mp4 first, as stated, I too use HandBrake for this.

I think that's what OP is doing - he first converts .mov to .mp4 with ffmpeg and then tries to rotate output .mp4 video.

alexpaton · 10-25-2018, 09:07 AM

I find that AVIDemux is one of the most useful video tools for applying filters to videos. It looks less pretty than Handbrake, but the settings are much more comprehensible.

teckk · 10-25-2018, 02:26 PM

Both of these will rotate video 90deg clockwise

Examples:

Code:

ffmpeg -i input.mov -c:a copy -c:v libx264 -crf 18 -preset slow -vf "rotate=PI/2" outfile.mp4

Code:

ffmpeg -i input.mov -c:a copy -c:v libx264 -crf 18 -preset slow -vf "transpose=1" outfile.mp4