ApsaraVideo VOD provides the content moderation feature. You can use this feature to detect illegal and non-compliant content such as terrorist, politically sensitive, and pornographic content, advertisements, undesirable scenes, and abuse in image, video, text, and audio files. This reduces the cost of manual review and improves the content quality, platform maintenance, and user experience. This topic describes the benefits, features, and scenarios of content moderation, and how to use these features.
Benefits
ApsaraVideo VOD provides basic review capabilities that are the same as those of AliGreenNet. You can use content moderation to detect illegal and non-compliant content such as terrorist, politically sensitive, and pornographic content, advertisements, undesirable scenes, and abuse in image, video, text, and audio files.
ApsaraVideo VOD combines the review processes for all resources about a media asset, including the video, audio, images (such as snapshots and thumbnails), and text (such as titles, descriptions, and tags) in one review task. This way, you need to submit only one review task to process all your media resources in an efficient manner.
ApsaraVideo VOD supports automated reviews based on workflows and custom templates. After a media file is uploaded to ApsaraVideo VOD, the system automatically reviews the file and returns the review results in real time.
The content moderation features of ApsaraVideo VOD can be used in every stage such as media asset management, editing, production, distribution, and playback to meet your business requirements in various scenarios. For example, you can transcode, discard, or archive a video after review. Non-compliant clips can also be automatically cropped before distribution.
Features
Feature | Description | References |
Automated review | The automated review feature is implemented based on a large amount of labeled data and deep learning algorithms. This feature detects illegal and non-compliant content, such as terrorist, politically sensitive, and pornographic content. You can use this feature to review videos, thumbnails, and titles in multiple dimensions such as audio, text, and visual display. You can use the automated review feature in multiple scenarios such as content review on media platforms. The automated review feature can improve the review efficiency. | |
Manual review | ApsaraVideo VOD provides the manual review feature that you can use to detect and block illegal and non-compliant videos in advance or take them offline. This reduces the adverse impact caused by illegal and non-compliant content. | |
Security IP address preview | ApsaraVideo VOD provides the security IP address preview feature to ensure that only users whose IP addresses are added to review security groups can play videos in the Reviewing or Blocked state. In most cases, this feature is used for internal reviews. |
Scenarios
You can use the automated review feature to check whether illegal and non-compliant content exists in short videos or user-generated content (UGC). Then, perform manual reviews on videos that contain suspected violations. This reduces the manual review workload.
You can use the automated review feature to check whether illegal and non-compliant content such as terrorist and politically sensitive content exists on media platforms or in on-demand videos. This helps you manage content violations.
Usage notes
The final review result of an audio or video file is determined by the results of automated review and manual review. If the results of automated review and manual review are different, the manual review result takes precedence over the automated review result.
Only audio and video files in the Normal state can be played on other platforms. You can play audio and video files in the Blocked or Reviewing state only by using the ApsaraVideo VOD console or IP addresses in review security groups described in Security IP address preview. However, unauthorized users can play the audio or video files if the playback URLs are leaked. You cannot call API operations or use SDKs to obtain the playback URLs of audio or video files that are in the Blocked or Reviewing state.
How to use the content moderation feature
Prerequisites
ApsaraVideo VOD is activated. For more information, see Activate ApsaraVideo VOD.
The audio or video file that you want to review is uploaded to the media asset library of ApsaraVideo VOD. For more information, see Overview.
Step 1: Configure the review process
When you upload an audio or video file to ApsaraVideo VOD, the file is processed based on the review process that you specified. This process determines whether the file can be played after it is uploaded. You can select Review After Publish or Review Before Publish. By default, Review After Publish is selected. This means that you can directly play videos that are transcoded and videos for which content delivery is enabled. If you select Review Before Publish, videos can be played only after they pass the review. For example, you cannot play videos that are only transcoded or videos for which content delivery is enabled.
Log on to the ApsaraVideo VOD console.
In the left-side navigation pane, choose Review Management > Settings.
On the Review Configuration tab, click Modify in the Process section.
In the dialog box that appears, select the review process.
Review process
Description
Review After Publish (Default)
After you upload an audio or video file to ApsaraVideo VOD, the file enters the Normal state. Audio and video files in the Normal state can be played.
You can perform an automated review or manual review on the audio or video file based on your business requirements. For more information, see Content moderation.
If you mark an audio or video file as Blocked during manual review, you can play the file only by using the ApsaraVideo VOD console or IP addresses in review security groups described in Security IP address preview. However, unauthorized users can play the audio or video file if the playback URL is leaked. You cannot call API operations or use SDKs to obtain the playback URLs of audio or video files that are in the Blocked state.
Review Before Publish
After you upload an audio or video file to ApsaraVideo VOD, the file automatically enters the Reviewing state after the file is transcoded.
You must perform a manual review on the file by following the steps described in Content moderation. Otherwise, the file remains in the Reviewing state. You can play the file in the Reviewing state only by using the ApsaraVideo VOD console or IP addresses in review security groups described in Security IP address preview. However, unauthorized users can play the audio or video file if the playback URL is leaked. You cannot call API operations or use SDKs to obtain the playback URLs of audio or video files that are in the Reviewing state.
Click OK.
Step 2: (Optional) Configure event notifications
We recommend that you configure event notifications in ApsaraVideo VOD before you review media files. This way, you can obtain information such as review status and results from the callbacks after the files are reviewed. For more information about how to configure event notifications, see Configure callbacks. The following content describes the events related to content moderation:
Manual review: CreateAuditComplete
Automated review:
Video Analysis Completed. You can call the SubmitAIMediaAuditJob operation to submit a review job only after the VideoAnalysisComplete event is triggered.
AI Processing Completed. The AIMediaAuditComplete event is triggered every time an AI processing job is complete.
Step 3: Start the review
We recommend that you perform automated reviews on audio and video files and then perform manual reviews only on files that contain suspected violations. This reduces the manual workload and improves the review performance. For more information, see the following topics:
You cannot call API operations to obtain the playback URLs of audio or video files that are in the Reviewing or Blocked state. You can play the files only by using the IP addresses in review security groups. This meets the internal review requirements. For more information, see Security IP address preview.