问题
I have been trying to figure out how to rotate videos with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (excellent library, btw) but I\'m stuck on FFmpeg now.
From what I\'ve read, what you need to use is a vfilter option. According to what I see, it should look like this:
ffmpeg -vfilters \"rotate=90\" -i input.mp4 output.mp4
However, I can\'t get this to work. First, -vfilters doesn\'t exist anymore, it\'s now just -vf. Second, I get this error:
No such filter: \'rotate\'
Error opening filters!
As far as I know, I have an all-options-on build of FFmpeg. Running ffmpeg -filters shows this:
Filters:
anull Pass the source unchanged to the output.
aspect Set the frame aspect ratio.
crop Crop the input video to x:y:width:height.
fifo Buffer input images and send them when they are requested.
format Convert the input video to one of the specified pixel formats.
hflip Horizontally flip the input video.
noformat Force libavfilter not to use any of the specified pixel formats
for the input to the next filter.
null Pass the source unchanged to the output.
pad Pad input image to width:height[:x:y[:color]] (default x and y:
0, default color: black).
pixdesctest Test pixel format definitions.
pixelaspect Set the pixel aspect ratio.
scale Scale the input video to width:height size and/or convert the i
mage format.
slicify Pass the images of input video on to next video filter as multi
ple slices.
unsharp Sharpen or blur the input video.
vflip Flip the input video vertically.
buffer Buffer video frames, and make them accessible to the filterchai
n.
color Provide an uniformly colored input, syntax is: [color[:size[:ra
te]]]
nullsrc Null video source, never return images.
nullsink Do absolutely nothing with the input video.
Having the options for vflip and hflip are great and all, but they just won\'t get me where I need to go. I need to the ability to rotate videos 90 degrees at the very least. 270 degrees would be an excellent option to have as well. Where have the rotate options gone?
回答1:
Rotate 90 clockwise:
ffmpeg -i in.mov -vf "transpose=1" out.mov
For the transpose parameter you can pass:
0 = 90CounterCLockwise and Vertical Flip (default)
1 = 90Clockwise
2 = 90CounterClockwise
3 = 90Clockwise and Vertical Flip
Use -vf "transpose=2,transpose=2" for 180 degrees.
Make sure you use a recent ffmpeg version from here (a static build will work fine).
Note that this will re-encode the audio and video parts. You can usually copy the audio without touching it, by using -c:a copy. To change the video quality, set the bitrate (for example with -b:v 1M) or have a look at the H.264 encoding guide if you want VBR options.
A solution is also to use this convenience script.
回答2:
If you don't want to re-encode your video AND your player can handle rotation metadata you can just change the rotation in the metadata using ffmpeg:
ffmpeg -i input.m4v -metadata:s:v rotate="90" -codec copy output.m4v
回答3:
Have you tried transpose yet? Like (from the other answer)
ffmpeg -i input -vf transpose=2 output
If you are using an old version, you have to update ffmpeg if you want to use the transpose feature, as it was added in October 2011.
The FFmpeg download page offers static builds that you can directly execute without having to compile them.
回答4:
I came across this page while searching for the same answer. It is now six months since this was originally asked and the builds have been updated many times since then. However, I wanted to add an answer for anyone else that comes across here looking for this information.
I am using Debian Squeeze and FFmpeg version from those repositories.
The MAN page for ffmpeg states the following use
ffmpeg -i inputfile.mpg -vf "transpose=1" outputfile.mpg
The key being that you are not to use a degree variable, but a predefined setting variable from the MAN page.
0=90CounterCLockwise and Vertical Flip (default)
1=90Clockwise
2=90CounterClockwise
3=90Clockwise and Vertical Flip
回答5:
To rotate the picture clockwise you can use the rotate filter, indicating a positive angle in radians. With 90 degrees equating with PI/2, you can do it like so:
ffmpeg -i in.mp4 -vf "rotate=PI/2" out.mp4
for counter-clockwise the angle must be negative
ffmpeg -i in.mp4 -vf "rotate=-PI/2" out.mp4
The transpose filter will work equally well for 90 degrees, but for other angles this is a faster or only choice.
回答6:
ffmpeg -vfilters "rotate=90" -i input.mp4 output.mp4
won't work, even with latest source...
must change the order:
ffmpeg -i input.mp4 -vf vflip output.mp4
works fine
回答7:
If you're getting a "Codec is experimental but experimental codecs are not enabled" error use this :
ffmpeg -i inputFile -vf "transpose=1" -c:a copy outputFile
Happened with me for some .mov file with aac audio.
回答8:
This script that will output the files with the directory structure under "fixedFiles". At the moment is fixed to MOV files and will execute a number of transformations depending on the original "rotation" of the video. Works with iOS captured videos on a Mac running Mavericks, but should be easily exportable. Relies on having installed both exiftool and ffmpeg.
#!/bin/bash
# rotation of 90 degrees. Will have to concatenate.
#ffmpeg -i <originalfile> -metadata:s:v:0 rotate=0 -vf "transpose=1" <destinationfile>
#/VLC -I dummy -vvv <originalfile> --sout='#transcode{width=1280,vcodec=mp4v,vb=16384,vfilter={canvas{width=1280,height=1280}:rotate{angle=-90}}}:std{access=file,mux=mp4,dst=<outputfile>}\' vlc://quit
#Allowing blanks in file names
SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
#Bit Rate
BR=16384
#where to store fixed files
FIXED_FILES_DIR="fixedFiles"
#rm -rf $FIXED_FILES_DIR
mkdir $FIXED_FILES_DIR
# VLC
VLC_START="/Applications/VLC.app/Contents/MacOS/VLC -I dummy -vvv"
VLC_END="vlc://quit"
#############################################
# Processing of MOV in the wrong orientation
for f in `find . -regex '\./.*\.MOV'`
do
ROTATION=`exiftool "$f" |grep Rotation|cut -c 35-38`
SHORT_DIMENSION=`exiftool "$f" |grep "Image Size"|cut -c 39-43|sed 's/x//'`
BITRATE_INT=`exiftool "$f" |grep "Avg Bitrate"|cut -c 35-38|sed 's/\..*//'`
echo Short dimension [$SHORT_DIMENSION] $BITRATE_INT
if test "$ROTATION" != ""; then
DEST=$(dirname ${f})
echo "Processing $f with rotation $ROTATION in directory $DEST"
mkdir -p $FIXED_FILES_DIR/"$DEST"
if test "$ROTATION" == "0"; then
cp "$f" "$FIXED_FILES_DIR/$f"
elif test "$ROTATION" == "180"; then
# $(eval $VLC_START \"$f\" "--sout="\'"#transcode{vfilter={rotate{angle=-"$ROTATION"}},vcodec=mp4v,vb=$BR}:std{access=file,mux=mp4,dst=\""$FIXED_FILES_DIR/$f"\"}'" $VLC_END )
$(eval ffmpeg -i \"$f\" -vf hflip,vflip -r 30 -metadata:s:v:0 rotate=0 -b:v "$BITRATE_INT"M -vcodec libx264 -acodec copy \"$FIXED_FILES_DIR/$f\")
elif test "$ROTATION" == "270"; then
$(eval ffmpeg -i \"$f\" -vf "scale=$SHORT_DIMENSION:-1,transpose=2,pad=$SHORT_DIMENSION:$SHORT_DIMENSION:\(ow-iw\)/2:0" -r 30 -s "$SHORT_DIMENSION"x"$SHORT_DIMENSION" -metadata:s:v:0 rotate=0 -b:v "$BITRATE_INT"M -vcodec libx264 -acodec copy \"$FIXED_FILES_DIR/$f\" )
else
# $(eval $VLC_START \"$f\" "--sout="\'"#transcode{scale=1,width=$SHORT_DIMENSION,vcodec=mp4v,vb=$BR,vfilter={canvas{width=$SHORT_DIMENSION,height=$SHORT_DIMENSION}:rotate{angle=-"$ROTATION"}}}:std{access=file,mux=mp4,dst=\""$FIXED_FILES_DIR/$f"\"}'" $VLC_END )
echo ffmpeg -i \"$f\" -vf "scale=$SHORT_DIMENSION:-1,transpose=1,pad=$SHORT_DIMENSION:$SHORT_DIMENSION:\(ow-iw\)/2:0" -r 30 -s "$SHORT_DIMENSION"x"$SHORT_DIMENSION" -metadata:s:v:0 rotate=0 -b:v "$BITRATE_INT"M -vcodec libx264 -acodec copy \"$FIXED_FILES_DIR/$f\"
$(eval ffmpeg -i \"$f\" -vf "scale=$SHORT_DIMENSION:-1,transpose=1,pad=$SHORT_DIMENSION:$SHORT_DIMENSION:\(ow-iw\)/2:0" -r 30 -s "$SHORT_DIMENSION"x"$SHORT_DIMENSION" -metadata:s:v:0 rotate=0 -b:v "$BITRATE_INT"M -vcodec libx264 -acodec copy \"$FIXED_FILES_DIR/$f\" )
fi
fi
echo
echo ==================================================================
sleep 1
done
#############################################
# Processing of AVI files for my Panasonic TV
# Use ffmpegX + QuickBatch. Bitrate at 16384. Camera res 640x424
for f in `find . -regex '\./.*\.AVI'`
do
DEST=$(dirname ${f})
DEST_FILE=`echo "$f" | sed 's/.AVI/.MOV/'`
mkdir -p $FIXED_FILES_DIR/"$DEST"
echo "Processing $f in directory $DEST"
$(eval ffmpeg -i \"$f\" -r 20 -acodec libvo_aacenc -b:a 128k -vcodec mpeg4 -b:v 8M -flags +aic+mv4 \"$FIXED_FILES_DIR/$DEST_FILE\" )
echo
echo ==================================================================
done
IFS=$SAVEIFS
回答9:
Alexy's answer almost worked for me except that I was getting this error:
timebase 1/90000 not supported by MPEG 4 standard, the maximum admitted value for the timebase denominator is 65535
I just had to add a parameter (-r 65535/2733) to the command and it worked. The full command was thus:
ffmpeg -i in.mp4 -vf "transpose=1" -r 65535/2733 out.mp4
回答10:
Unfortunately, the Ubuntu version of ffmpeg does support videofilters.
You need to use avidemux or some other editor to achieve the same effect.
In the programmatic way, mencoder has been recommended.
回答11:
Smartphone: Recored a video in vertical format
Want to send it to a webside it was 90° to the left (anti clockwise, landscape format) hmm.
ffmpeg -i input.mp4 -vf "rotate=0" output.mp4
does it. I got vertical format back again
debian buster: ffmpeg --version ffmpeg version 4.1.4-1~deb10u1 Copyright (c) 2000-2019 the FFmpeg developers
来源：https://stackoverflow.com/questions/3937387/rotating-videos-with-ffmpeg