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mfoley

10-23-2018 10:50 PM

How to rotate mp4 file

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 (Post 5918850)

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

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