autompeg.py

# import all necessarily modules

import os.path
import subprocess
import sys
from configparser import ConfigParser

# working dir and extension types will be passed through CLI
# Config Parser

config = ConfigParser(allow_no_value=True)

try:
    with open('config.ini', 'r') as cfg:
        config.read_file(cfg)
        path = config.get('Path of ffmpeg', 'path')
except IOError:
    print("Couldn't find or open configuration file for ffmpeg. Process is exiting now..")
    sys.exit()

# exception-clause to prevent a faulty WorkDir and therefore the following ffmpeg process

try:
    workDir = sys.argv[1]
    extType = sys.argv[2]
    newExtType = sys.argv[3]

except IndexError:
    raise Exception("Usage: python3 autompeg.py <path to workfolder> <old fileformat> <new fileformat>"
                    "e.g. (Windows) python3 autompeg.py C:\\Users\\Test\\Work .ts .mp4"
                    "e.g. (Mac) python3 autompeg.py /Volumes/Volume1/Work .ts .mp4"
                    "e.g. (Linux) python3 automopeg.py ~/Videos/Work .ts .mp4")

if sys.platform.startswith('win32'):

    workDir = workDir.replace('/', '\\')
else:
    pass

for root, directories, filenames in os.walk(workDir):
    for filename in filenames:
        filename = os.path.join(root, filename)
        newfilename = os.path.splitext(filename)[0] + newExtType
        if filename.endswith(extType):  # scan for files with the extension given in 'extType'
            filepath = filename
            newfilepath = newfilename

            # no need to include an exception-clause here yet, since ffmpeg automatically detects a faulty filepath

            subprocess.run(
                [
                    path,  # path of ffmpeg
                    "-i",  # input argument for file
                    f'{filepath}',  # file path of the old media file
                    "-c:v",  # select video stream
                    "copy",  # copy video stream and don't convert it (to prevent quality loss)
                    "-bsf:a",  # select bitstream filter for the audio stream
                    "aac_adtstoasc",  # remove the ADTS header from the audio stream
                    f'{newfilepath}',  # file path of the 'new' media file
                ]
            )