how to correctly scan a video file to check for corruption

ffmpeg_check_file.py

def decode_full_scan(path):
    ffprobe_cmd = [
        'ffprobe', '-show_entries', 'stream=r_frame_rate,nb_read_frames,duration',
        '-select_streams', 'v', '-count_frames',
        '-of', 'json',
        '-threads', '20',
        '-v', '0',
        path,
    ]

    ffprobe = subprocess.Popen(ffprobe_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    output, err = ffprobe.communicate()
    data = json.loads(output)['streams'][0]

    r_frame_rate = fractions.Fraction(data['r_frame_rate'])
    nb_frames = int(data['nb_read_frames'])
    metadata_duration = float(data['duration'])
    actual_duration = nb_frames * r_frame_rate.denominator / r_frame_rate.numerator

    difference = abs(actual_duration - metadata_duration)
    average_duration = (actual_duration + metadata_duration) / 2
    percent_diff = (difference / average_duration) * 100

    if difference > 0.1:
        log.warning(f'[{path}]: Actual duration ({actual_duration:.2f}) does not match metadata duration ({metadata_duration:.2f}) by {difference:.2f}s')

    return percent_diff