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#1 2011-10-12 08:43:26
- kahlil88
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Unable to rotate video
Trying to rotate some home movies that were filmed sideways by mistake. They just need to be rotated 90° counter-clockwise, and I've tried with both mencoder and ffmpeg but neither of them actually rotates the videos.
mencoder VIDEO.AVI -vf rotate=2 -oac copy -ovc copy -o VIDEO-ROTATED.AVI
ffmpeg -i VIDEO.AVI -acodec copy -vcodec copy -vf rotate=2 VIDEO-ROTATED.AVIThere is no system but GNU and Linux is one of its kernels.
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#2 2011-10-12 08:57:58
- karol
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Re: Unable to rotate video
mencoder -vf rotate=2 -oac pcm -ovc lavc input.file -o output.file works for me.
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#3 2011-10-12 21:50:12
- kahlil88
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Re: Unable to rotate video
Maybe my videos are just too weird a format for it to handle? Here is the output of 'ffmpeg -i'
$ ffmpeg -i VIDEO.AVI
ffmpeg version 0.7.6, Copyright (c) 2000-2011 the FFmpeg developers
built on Oct 3 2011 13:04:32 with gcc 4.6.1 20110819 (prerelease)
configuration: --prefix=/usr --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-postproc --enable-shared --enable-x11grab --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libschroedinger --enable-libopenjpeg --enable-librtmp --enable-gpl --enable-version3 --enable-runtime-cpudetect --disable-debug
libavutil 50. 43. 0 / 50. 43. 0
libavcodec 52.122. 0 / 52.122. 0
libavformat 52.110. 0 / 52.110. 0
libavdevice 52. 5. 0 / 52. 5. 0
libavfilter 1. 80. 0 / 1. 80. 0
libswscale 0. 14. 1 / 0. 14. 1
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, avi, from 'VIDEO.AVI':
Metadata:
encoder : Lavf52.110.0
Duration: 00:03:55.40, start: 0.000000, bitrate: 6094 kb/s
Stream #0.0: Video: mjpeg, yuvj420p, 640x480, 14.99 tbr, 14.99 tbn, 14.99 tbc
Stream #0.1: Audio: mp3, 44100 Hz, stereo, s16, 224 kb/sThere is no system but GNU and Linux is one of its kernels.
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#4 2011-10-12 22:14:20
- R00KIE
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Re: Unable to rotate video
Lets take the ffmpeg example, you have "-acodec copy -vcodec copy" this will copy the video and audio streams directly to the output file, to rotate the video you need to re-encode it so directly copying it is not an option, for the audio it should be ok.
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#5 2011-10-12 22:21:36
- karol
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Re: Unable to rotate video
Lets take the ffmpeg example, you have "-acodec copy -vcodec copy" this will copy the video and audio streams directly to the output file, to rotate the video you need to re-encode it so directly copying it is not an option, for the audio it should be ok.
+1
When I used '-ovc copy' the video remained unrotated.
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#6 2011-10-12 22:44:07
- kahlil88
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Re: Unable to rotate video
So there's no way to losslessly rotate it?
There is no system but GNU and Linux is one of its kernels.
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#7 2011-10-13 10:39:40
- R00KIE
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Re: Unable to rotate video
So there's no way to losslessly rotate it?
Not that I know of, it could be possible to use a container format that would allow you to specify the desired rotation, which when used with a player that supports output rotation would make it work as you want, but I don't know if that's possible or widely supported.
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#8 2011-10-13 17:27:43
- DrZaius
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Re: Unable to rotate video
ffmpeg -i VIDEO.AVI -acodec copy -vcodec copy -vf rotate=2 VIDEO-ROTATED.AVI
The filter used to rotate video in FFmpeg is called transpose:
ffmpeg -i VIDEO.AVI -acodec copy -vcodec mjpeg -qscale 2 -vf transpose=2 VIDEO-ROTATED.AVIYou didn't mention a specific output format, so I just used the same as the input.
So there's no way to losslessly rotate it?
You could use a lossless format, but the file will be much bigger.
ffmpeg -i VIDEO.AVI -acodec copy -vcodec huffyuv -vf transpose=2 VIDEO-ROTATED.mkvI know you can losslessly rotate jpg images with jpegtran for example, but I'm not sure about mjpeg.
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#9 2011-10-14 04:03:02
- ConnorBehan
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Re: Unable to rotate video
Mplayer can of course use the rotate and transpose filters for playback. But I guess that only helps if you never want to use another player.
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