Quick and dirty code to extract all frames from mp4 files recusively

ffmpeg-gun.py

from __future__ import print_function
import sys
import os
from glob import glob
import subprocess

ffmpeg_binary = "C:\\Windows\\System32\\ffmpeg.exe"
working_path = sys.argv[1:][0]
mp4_files = [y for x in os.walk(working_path) for y in glob(os.path.join(x[0], '*.mp4'))]

def shoot_ffmpeg(filename, folder):
    # print("working on file: " + str(filename))
    ffmpeg_input_arg = "-i " + "\"" + filename + "\""
    ffmpeg_output_arg = "\"" + os.path.join(folder, "frames-%06d.png") +  "\""
    exec_command = ffmpeg_binary + " " + ffmpeg_input_arg + " " + ffmpeg_output_arg 
    print("Executing " + exec_command )
    process = subprocess.Popen(exec_command, shell=True, stdout=None)
    process.wait()
    print(process.returncode)

for mp4_file in mp4_files:
    # print (mp4_file)
    # print(os.path.dirname(mp4_file))
    frame_path = os.path.splitext(mp4_file)[0] + "_frames"
    if not os.path.exists(frame_path):
        os.makedirs(frame_path)
        # print(frame_path)
    shoot_ffmpeg(mp4_file, frame_path)