Rotating videos with FFmpeg
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.
convenience.py
#! /usr/bin/env python
# -*- coding: utf-8 -*-
"""
rotate_video.py
A (simple) library to rotate movies.
"""
# cmd = """
# ORIGINAL_IFS=$IFS
# IFS=$'\n'
# ffmpeg -i %s -v 0 -vf "transpose=%s" -qscale 0 -y tmp.mov && mv tmp.mov %s
# IFS=$ORIGINAL_IFS
# """ % (PATH, str(int(CCW)), PATH)
#
import sys, os, glob
def rotate(PATH, CW=False):
"""
0 = 90CounterCLockwise and Vertical Flip (default)
1 = 90Clockwise
2 = 90CounterClockwise
3 = 90Clockwise and Vertical Flip
"""
EXT = PATH.split('.')[-1]
# print 'DEBUG: # of transpose = ', str(1+int(CW))
cmd = 'ffmpeg -i "%s" -v 0 -vf "transpose=%s" -qscale 0 -y "%s-tmp.%s" && mv "%s-tmp.%s" "%s"' % (PATH, str(1 + int(CW)), PATH, EXT, PATH, EXT, PATH)
print 'DEBUG: cmd = ', cmd
try:
os.system(cmd)
except Exception, e:
print 'Command ', cmd, ' failed, error is: ', e
if __name__=="__main__":
args = sys.argv[1:]
if not len(args):
print("""
Usage: python rotate_video.py [-c] 'pattern'
the -c option is to turn video counter-clockwise --- the default is
clockwise.
""")
else:
CW = args[0]
PATHS = args[1:]
if CW != '-c':
CW = ''
PATHS = args
for PATH in PATHS:
for filename in glob.glob(PATH):
print 'Processing file ', filename
rotate(filename, CW=='-c')
