获取MOV视频的元数据

Question

我有一个手机消息应用程序发送的.MOV视频.我可以检索文件和作者的真实创建数据吗？我尝试使用ffprobe,mediainfo和类似的工具,但只给我下载它的日期.

Answer 1

我写了一个快速的Python脚本,可以获取创建和修改时间戳,因为这些很容易找到.找到作者有点困难,因为它可以以几种不同的方式存储.用法示例:

$ ./mov-timestamps.py file.mov
creation date: 2013-03-29 16:14:01
modification date: 2013-03-29 16:14:13

有时您可能会看到日期为1/1/1904.这意味着时间戳为0.如果您看到日期为1970年1月1日,则该文件可能是由FFmpeg生成的,出于安全原因,该文件不存储此元数据.

#!/usr/bin/python

import datetime
import struct
import sys

ATOM_HEADER_SIZE = 8
# difference between Unix epoch and QuickTime epoch, in seconds
EPOCH_ADJUSTER = 2082844800

if len(sys.argv) < 2:
    print "USAGE: mov-length.py <file.mov>"
    sys.exit(1)

# open file and search for moov item
f = open(sys.argv[1], "rb")
while 1:
    atom_header = f.read(ATOM_HEADER_SIZE)
    if atom_header[4:8] == 'moov':
        break
    else:
        atom_size = struct.unpack(">I", atom_header[0:4])[0]
        f.seek(atom_size - 8, 1)

# found 'moov', look for 'mvhd' and timestamps
atom_header = f.read(ATOM_HEADER_SIZE)
if atom_header[4:8] == 'cmov':
    print "moov atom is compressed"
elif atom_header[4:8] != 'mvhd':
    print "expected to find 'mvhd' header"
else:
    f.seek(4, 1)
    creation_date = struct.unpack(">I", f.read(4))[0]
    modification_date = struct.unpack(">I", f.read(4))[0]
    print "creation date:",
    print datetime.datetime.utcfromtimestamp(creation_date - EPOCH_ADJUSTER)
    print "modification date:",
    print datetime.datetime.utcfromtimestamp(modification_date - EPOCH_ADJUSTER)

Answer 2

因此，我将MMM 的代码更新为 Python3 并改进了一些内容。

def get_mov_timestamps(filename):
    ''' Get the creation and modification date-time from .mov metadata.

        Returns None if a value is not available.
    '''
    from datetime import datetime as DateTime
    import struct

    ATOM_HEADER_SIZE = 8
    # difference between Unix epoch and QuickTime epoch, in seconds
    EPOCH_ADJUSTER = 2082844800

    creation_time = modification_time = None

    # search for moov item
    with open(filename, "rb") as f:
        while True:
            atom_header = f.read(ATOM_HEADER_SIZE)
            #~ print('atom header:', atom_header)  # debug purposes
            if atom_header[4:8] == b'moov':
                break  # found
            else:
                atom_size = struct.unpack('>I', atom_header[0:4])[0]
                f.seek(atom_size - 8, 1)

        # found 'moov', look for 'mvhd' and timestamps
        atom_header = f.read(ATOM_HEADER_SIZE)
        if atom_header[4:8] == b'cmov':
            raise RuntimeError('moov atom is compressed')
        elif atom_header[4:8] != b'mvhd':
            raise RuntimeError('expected to find "mvhd" header.')
        else:
            f.seek(4, 1)
            creation_time = struct.unpack('>I', f.read(4))[0] - EPOCH_ADJUSTER
            creation_time = DateTime.fromtimestamp(creation_time)
            if creation_time.year < 1990:  # invalid or censored data
                creation_time = None

            modification_time = struct.unpack('>I', f.read(4))[0] - EPOCH_ADJUSTER
            modification_time = DateTime.fromtimestamp(modification_time)
            if modification_time.year < 1990:  # invalid or censored data
                modification_time = None

    return creation_time, modification_time

和...

你不知道吗，就在我完成时，我发现了如何使用 exiftool 来完成它，我用它来处理 .jpg 文件的类似任务。:-/

? exiftool -time:all img_3904.mov

Answer 3

你尝试过hachoir吗？使用 来安装它pip install hachoir，然后在命令行中：

$ hachoir-metadata IMG_9395.MOV

返回例如

Metadata:
- Duration: 2 sec 220 ms
- Image width: 1440 pixels
- Image height: 1080 pixels
- Creation date: 2020-04-15 20:22:57
- Last modification: 2020-04-15 20:22:58
- Comment: Play speed: 100.0%
- Comment: User volume: 100.0%
- MIME type: video/quicktime
- Endianness: Big endian

如果您愿意，也可以在 Python 中使用它：

Metadata:
- Duration: 2 sec 220 ms
- Image width: 1440 pixels
- Image height: 1080 pixels
- Creation date: 2020-04-15 20:22:57
- Last modification: 2020-04-15 20:22:58
- Comment: Play speed: 100.0%
- Comment: User volume: 100.0%
- MIME type: video/quicktime
- Endianness: Big endian

Answer 4

这是一个不是纯 python 的版本，而是需要 libmediainfo，它是 mediainfo 工具的一部分。

import pymediainfo
import sys

media_info = pymediainfo.MediaInfo.parse(sys.argv[1])

#For the first track - otherwise iterate over each track
print(' Encoded date {}'.format(track[0].encoded_date))
print(' Tagged date {}'.format(track[0].tagged_date))