Python 获取视频时长方法get video duration

def get_video_duration(video_file):
    cmd = [
        "ffmpeg",
        "-i", str(video_file),
        "-f", "null", "-"
    ]

    output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
    result_all = ffmpeg_duration_template.findall(output.decode())
    if result_all:
        result = result_all[-1]
        duration = float(result[0]) * 60 * 60 \
                   + float(result[1]) * 60 \
                   + float(result[2]) \
                   + float(result[3]) * (10 ** -len(result[3]))
    else:
        duration = -1
    return duration 

def get_video_duration(path_video):
    '''Get the duration of a video.

    Parameter:
        path_video <str> - The path of the input video.

    Return:
        duration <str> - The duration of the input video formatted as 'hh:mm:ss.msec'.
    '''
    # Create the command for getting the information of the input video via ffprobe.
    cmd = ['ffprobe', '-show_format', '-pretty', '-loglevel', 'quiet', path_video]
    # Get the information of the input video via ffprobe command.
    info_byte = check_output(cmd)  # <bytes>
    # Decode the information.
    info_str = info_byte.decode("utf-8")  # <str>
    # Split the information.
    info_list = re.split('[\n]', info_str)

    # Get the duration of the input video.
    for info in info_list:
        if 'duration' in info:
            # E.g., 'info' = 'duration=0:00:01.860000'.
            duration = re.split('[=]', info)[1]

    return duration 

def get_video_stream_duration(stream):
    with TemporaryDirectory() as tmp:
        in_file = Path(tmp) / "in"
        in_file.write_bytes(stream)

        try:
            result = subprocess.run(
                [
                    "ffprobe",
                    "-v",
                    "error",
                    "-show_entries",
                    "format=duration",
                    "-of",
                    "default=noprint_wrappers=1:nokey=1",
                    f"{in_file}",
                ],
                capture_output=True,
            )
            result = float(result.stdout)
        except FileNotFoundError:
            result = None
    return result 

def get_video_duration(path):
    result = subprocess.Popen(["ffprobe", path], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    matches = [x for x in result.stdout.readlines() if "Duration" in x]
    duration_string = re.findall(r'Duration: ([0-9:]*)', matches[0])[0]
    return math.ceil(duration_string_to_timedelta(duration_string).seconds)

def get_video_duration(video_file):
    """Get video duration in seconds"""
    try:
        return float(FFProbe(video_file).video[0].duration)
    except Exception as e:
        print("could not extract duration from video {} due to {}".format(video_file, e))
        return None

def get_video_duration(self, youtube_id):
        """
        For youtube videos, queries Google API for video duration information.

        This returns an "unknown" duration flag if no API key has been defined, or if the query fails.
        """
        duration = VIDEO_UNKNOWN_DURATION
        if self.api_key is None:
            return duration

        # Slow: self.incr_counter(self.counter_category_name, 'Subset Calls to Youtube API', 1)
        video_file = None
        try:
            video_url = "https://www.googleapis.com/youtube/v3/videos?id={0}&part=contentDetails&key={1}".format(
                youtube_id, self.api_key
            )
            video_file = urllib.urlopen(video_url)
            content = json.load(video_file)
            items = content.get('items', [])
            if len(items) > 0:
                duration_str = items[0].get(
                    'contentDetails', {'duration': 'MISSING_CONTENTDETAILS'}
                ).get('duration', 'MISSING_DURATION')
                matcher = re.match(r'PT(?:(?P<hours>\d+)H)?(?:(?P<minutes>\d+)M)?(?:(?P<seconds>\d+)S)?', duration_str)
                if not matcher:
                    log.error('Unable to parse duration returned for video %s: %s', youtube_id, duration_str)
                    # Slow: self.incr_counter(self.counter_category_name, 'Quality Unparseable Response From Youtube API', 1)
                else:
                    duration_secs = int(matcher.group('hours') or 0) * 3600
                    duration_secs += int(matcher.group('minutes') or 0) * 60
                    duration_secs += int(matcher.group('seconds') or 0)
                    duration = duration_secs
                    # Slow: self.incr_counter(self.counter_category_name, 'Subset Calls to Youtube API Succeeding', 1)
            else:
                log.error('Unable to find items in response to duration request for youtube video: %s', youtube_id)
                # Slow: self.incr_counter(self.counter_category_name, 'Quality No Items In Response From Youtube API', 1)
        except Exception:  # pylint: disable=broad-except
            log.exception("Unrecognized response from Youtube API")
            # Slow: self.incr_counter(self.counter_category_name, 'Quality Unrecognized Response From Youtube API', 1)
        finally:
            if video_file is not None:
                video_file.close()

        return duration