如何使用 Python 获取 Google Drive 中视频文件的持续时间？

Question

我的视频文件 ID 和 Google Drive API 访问都正确，我希望我的代码返回视频文件的持续时间。我知道有“videoMediaMetadata.durationMillis”文件属性，但我不知道如何使用它。谢谢！

SCgenericQ = service.files().list(q="mimeType = 'application/vnd.google-apps.folder' and starred=true",
        fields="nextPageToken, files(id, name)").execute()
    starredSCfolders = SCgenericQ.get('files', [])

    if not starredSCfolders:
        print('No files found.')
    else:
        counter = 18
        for _ in starredSCfolders:
            folderId = starredSCfolders[counter].get('id')
            exactCourseQ = service.files().list(q="'" + folderId + "' in parents", fields="nextPageToken, files(id, name)").execute()
            courseFiles = exactCourseQ.get('files', [])  
            courseUnitIds = []
            videos = []
            
            for element in courseFiles:
                if element['name'].startswith('UNI'):
                    courseUnitIds.append(element['id'])
            for Id in courseUnitIds:
                openLessons = service.files().list(q="'" + Id + "' in parents and mimeType = 'application/vnd.google-apps.folder'", fields="nextPageToken, files(id, name)").execute()
                LessonIds = openLessons.get('files', [])
                
                filesExcFolder = service.files().list(q="'" + Id + "' in parents and mimeType != 'application/vnd.google-apps.folder'", fields="nextPageToken, files(id, name)").execute()
                nonFolders = filesExcFolder.get('files', [])

                if not LessonIds:
                    MOV_videoFiles = service.files().list(q="'" + Id + "' in parents and mimeType contains 'video/Quicktime'", fields="nextPageToken, files(id, name)").execute()
                    movFiles = MOV_videoFiles.get('files', [])
                    MP4_videoFiles = service.files().list(q="'" + Id + "' in parents and mimeType contains 'video/mp4'", fields="nextPageToken, files(id, name)").execute()
                    mp4Files = MP4_videoFiles.get('files', [])
                    for mov in movFiles:
                        videos.append(mov['name'])
                    for mp4 in mp4Files:
                        videos.append(mp4['id'])
                    for videoId in videos:
                        request = service.files().get(fileId="'" + videoId + "'", fields='videoMediaMetadata').execute()
                        duration_seconds = int(request.get('videoMediaMetadata')['durationMillis'])/1000

            print(videos) 
            print(duration_seconds)      
            break```

Answer 1

假设您已经可以访问您的驱动器文件和您在问题中提到的元数据：durationMillis 对应于视频的持续时间（以毫秒为单位）。您只需将持续时间除以 1000 即可获得秒数。

request = service.files().get(fileId=ID_OF_VIDEO, fields='videoMediaMetadata').execute()
duration_seconds = int(request.get('videoMediaMetadata')['durationMillis'])/1000

编辑

您不需要再次获取文件，只需制作 google drive 即可首先为您提供所需的数据。只需在需要的字段部分添加videoMediaMetadata。

### your other code above make sure you place "durations = []" below your "videos=[]"!
           
                    MP4_videoFiles = service.files().list(q="'" + Id + "' in parents and mimeType contains 'video/mp4'", fields="nextPageToken, files(id, name, videoMediaMetadata)").execute() # This gives you the videoMediaMetadata!
                    mp4Files = MP4_videoFiles.get('files', [])
                    for mov in movFiles:
                        videos.append(mov['name'])
                    for mp4 in mp4Files:
                        videos.append(mp4['id']
                        durations.append(int(mp4['videoMediaMetadata']['durationMillis'])/1000) # read the duration 

            print(videos) 
            print(durations)     

如果需要，您可以将示例扩展到其他用例。请注意，这仍然不是一个花哨的解决方案。理想情况下，您可以通过良好的请求做更多事情，从而节省更多时间，但这应该可以工作，您可以改进。希望对您有所帮助！