背景和问题

Question 1

FFmpeg 默认不会传输大多数用户元数据，但它会传输旋转标签等字段。

以下命令指示 FFmpeg 传输所有元数据，但随后覆盖旋转标签值。

ffmpeg -i in.mp4 -c copy -map_metadata 0 -metadata:s:v:0 rotate=0 -an out.mp4

Answer

FFmpeg 默认不会传输大多数用户元数据，但它会传输旋转标签等字段。

以下命令指示 FFmpeg 传输所有元数据，但随后覆盖旋转标签值。

ffmpeg -i in.mp4 -c copy -map_metadata 0 -metadata:s:v:0 rotate=0 -an out.mp4

Question 2

运行此命令：

ffmpeg -i oldfile.mp4 -codec copy -metadata title="" -metadata album="" -metadata year="" -metadata container="" -metadata artist="" -metadata comment="" newfile.mp4

通过在每个元数据类型中使用“”，它将清空旧的元数据，然后 ffmpeg 会将整个文件复制到一个元数据已被清除的新文件。

您需要在创建新文件后删除旧文件以避免重复。

Answer

运行此命令：

ffmpeg -i oldfile.mp4 -codec copy -metadata title="" -metadata album="" -metadata year="" -metadata container="" -metadata artist="" -metadata comment="" newfile.mp4

通过在每个元数据类型中使用“”，它将清空旧的元数据，然后 ffmpeg 会将整个文件复制到一个元数据已被清除的新文件。

您需要在创建新文件后删除旧文件以避免重复。

Question 3

安装 mutagen python 库：
```
python3.6 -m pip install --user mutagen
```
或者：
```
python2.7 -m pip install --user mutagen
```
Mutagen 是一个处理音频元数据的 Python 模块。
将以下内容保存为，metadata_cleaner.py但您可以随意命名。
改变VIDEO_FOLDER = 'your_full_path_for_your_videos_folder'变量。
在“您的更改”行之间修改您想要覆盖的属性。
随处奔跑python metadata_cleaner.py。

脚本如下：

import os
from mutagen.mp4 import MP4
## Can import MP3 as well if you want to modify MP3 files

## Folder full path to the files you want to modify:

FILES_FOLDER = "/media/removable/64GB-Micro/FilesToClean"

def get_all_files(path):
    """Returns all the files in the path as a list
    """
    return os.listdir(path)

def clean_metadata(videos_dir, files):
    """
    Receives two variables videos_dir (full file folder path) and files (list)
    Iterates over all the files in the directory and creates full paths for 
    every file using the videos_dir path and os.path.join function.
    """
    for file_name in files:
        file_path = os.path.join(videos_dir, file_name)

        ## create MP4 video_file instance

        video_file = MP4(file_path)

        ## This line will print out all key-value for the video_file-s:
        ## Useful if you don't know which attributes you want to modify yet

        print(video_file)

        ## In this example I wanted to clean the ART, aArt = Artist metadata
        ## and nam = Song Name metadata
        ## These prints will show artists and titles for each file before clean
        ## -------------------------- Your changes ---------------------------
        print("file_name: {}".format(file_name))
        print("Old ART: {}".format(video_file.get('\xa9ART', "Key not found")))
        print("Old aArt: {}".format(video_file.get('aART', "Key not found")))
        print("Old nam: {}".format(video_file.get('\xa9nam', "Key not found")))

        ## clean artist and name
        ## This part will overwrite the artist and song name attributes

        video_file['\xa9ART'] = ''
        video_file['aART'] = ''
        video_file['\xa9nam'] = ''
        ## -------------------------- Your changes ---------------------------
        ## save new metadata

        video_file.save()

        ## show video_file artist and title after clean
        ## Just to see if our actions were successful print out song metadata
        ## again after the changes

        print("New ART: {}".format(video_file.get('\xa9ART', "Key not found")))
        print("New aArt: {}".format(video_file.get('aART', "Key not found")))
        print("New nam: {}".format(video_file.get('\xa9nam', "Key not found")))


if __name__ == '__main__':
    ## load all the files into files variable as a list

    files = get_all_files(FILES_FOLDER)

    ## run clean_metadata function to clean all the files in the VIDEO_FOLDER
    ## path
    clean_metadata(videos_dir=FILES_FOLDER, files=files)

Answer

安装 mutagen python 库：
```
python3.6 -m pip install --user mutagen
```
或者：
```
python2.7 -m pip install --user mutagen
```
Mutagen 是一个处理音频元数据的 Python 模块。
将以下内容保存为，metadata_cleaner.py但您可以随意命名。
改变VIDEO_FOLDER = 'your_full_path_for_your_videos_folder'变量。
在“您的更改”行之间修改您想要覆盖的属性。
随处奔跑python metadata_cleaner.py。

脚本如下：

import os
from mutagen.mp4 import MP4
## Can import MP3 as well if you want to modify MP3 files

## Folder full path to the files you want to modify:

FILES_FOLDER = "/media/removable/64GB-Micro/FilesToClean"

def get_all_files(path):
    """Returns all the files in the path as a list
    """
    return os.listdir(path)

def clean_metadata(videos_dir, files):
    """
    Receives two variables videos_dir (full file folder path) and files (list)
    Iterates over all the files in the directory and creates full paths for 
    every file using the videos_dir path and os.path.join function.
    """
    for file_name in files:
        file_path = os.path.join(videos_dir, file_name)

        ## create MP4 video_file instance

        video_file = MP4(file_path)

        ## This line will print out all key-value for the video_file-s:
        ## Useful if you don't know which attributes you want to modify yet

        print(video_file)

        ## In this example I wanted to clean the ART, aArt = Artist metadata
        ## and nam = Song Name metadata
        ## These prints will show artists and titles for each file before clean
        ## -------------------------- Your changes ---------------------------
        print("file_name: {}".format(file_name))
        print("Old ART: {}".format(video_file.get('\xa9ART', "Key not found")))
        print("Old aArt: {}".format(video_file.get('aART', "Key not found")))
        print("Old nam: {}".format(video_file.get('\xa9nam', "Key not found")))

        ## clean artist and name
        ## This part will overwrite the artist and song name attributes

        video_file['\xa9ART'] = ''
        video_file['aART'] = ''
        video_file['\xa9nam'] = ''
        ## -------------------------- Your changes ---------------------------
        ## save new metadata

        video_file.save()

        ## show video_file artist and title after clean
        ## Just to see if our actions were successful print out song metadata
        ## again after the changes

        print("New ART: {}".format(video_file.get('\xa9ART', "Key not found")))
        print("New aArt: {}".format(video_file.get('aART', "Key not found")))
        print("New nam: {}".format(video_file.get('\xa9nam', "Key not found")))


if __name__ == '__main__':
    ## load all the files into files variable as a list

    files = get_all_files(FILES_FOLDER)

    ## run clean_metadata function to clean all the files in the VIDEO_FOLDER
    ## path
    clean_metadata(videos_dir=FILES_FOLDER, files=files)

背景和问题

背景和问题

额外的信息

重新混合之前的元数据

重新混合过程

重新混合后的元数据

答案1

答案2

答案3

相关内容