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@daltonbr
Created September 21, 2021 08:52
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Batch reencode video files with FFmpeg - version 1.0 - using python 3.9
#!/usr/bin/env python3
#
# Batch file converter to reencode mp4 videos with a steady fixed i-frame interval (default to 25)
#
# Tested under python 3.9.7
# Requires ffmpeg installed
# On Mac run 'brew install ffmpeg'
#
# You may need to give permission to this script
# $ chmod 700 ./iframe-steady.py
#
# Run this script from the same directory as your mp4 files
#
# e.g.
# $ ./iframe-steady.py
#
# This is main ffmpeg command run
# ffmpeg -i input.mp4 -c:v libx264 -preset slow -crf 22 -g 25 -keyint_min 25 -sc_threshold 0 -c:a copy output.mp4
#
# check for a new 'exported_videos' folder
#
# [email protected]
# Know issue your files shouldn't have spaces our `.` (periods) in the file names.
#
print ('Make i-frames steadier')
import os, sys
directory = '.'
def is_tool(name):
"""Check whether `name` is on PATH and marked as executable."""
from shutil import which
return which(name) is not None
# check if have ffmpeg
if is_tool('ffmpeg') == False:
sys.exit ("ffmpeg not found! Run 'brew install ffmpeg' and run this script again")
# create a new folder named sequentially
try:
i = 0
new_folder = "exported_videos_%s"
while os.path.exists(new_folder % i):
i += 1
new_folder = new_folder % i
os.makedirs(new_folder)
except OSError as e:
if e.errno != errno.EEXIST:
raise
# for each mp4 files in the dir, runs ffmpeg and output to that new folder
for filename in os.listdir(directory):
f = os.path.join(directory, filename)
if os.path.isfile(f):
if (f.endswith('.mp4')):
print(f + ' is a mp4 file')
os.system(f'ffmpeg -i {f} -c:v libx264 -preset slow -crf 22 -g 25 -keyint_min 25 -sc_threshold 0 -c:a copy {new_folder}/{f.removeprefix("./")}')
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