You can download media files stored in ApsaraVideo VOD to on-premises disks or other storage devices. You can use the ApsaraVideo VOD console, client, or API operations to query the download URLs of various media files. This topic describes the media files, download URL types, download limits, and query methods.
Media files
ApsaraVideo VOD may generate multiple types of media files, which include mezzanine files, transcoded stream files, video snapshot files, and uploaded image files. ApsaraVideo VOD allows you to query and download the following types of media files:
Audio and video
Mezzanine files uploaded to ApsaraVideo VOD
Transcoded stream files in a specified definition
Image
Image files uploaded to ApsaraVideo VOD
Image files of thumbnail snapshots and image sprite snapshots automatically generated by ApsaraVideo VOD during snapshot processing
Image files of normal snapshots, image sprite snapshots, and original snapshots that compose sprite snapshots generated after you call the SubmitSnapshotJob operation. For more information, see SubmitSnapshotJob.
Download URL types
The media file download URLs that you can obtain include the Object Storage Service (OSS) source URLs and Alibaba Cloud CDN URLs. You are charged Outbound traffic fees for downloads from OSS source URLs. These fees are the result of OSS outbound traffic. You are charged CDN traffic fees for downloads from CDN URLs. These fees are the result of Acceleration.
Storage address
By default, the download URL of each media file is an OSS URL. For more information, see Manage VOD resources.
If a domain name for CDN is configured, the download URL of each media file is the CDN URL. You can forcibly return the OSS URL of a mezzanine file or a transcoded stream file as the download URL. To obtain the OSS URL, you can set the
OutputTypeparameter toossto obtain the download URL. For more information, see GetMezzanineInfo and GetPlayInfo. The download URL of a mezzanine file stored in an input bucket is the OSS URL even when a domain name for CDN is configured. The name of an input bucket starts within-.
CDN URL
If a domain name for CDN is configured, the download URL of each media file is the CDN URL. For more information about how to configure a domain name for CDN, see Add a domain name.
Limits
If media security services such as hotlink protection and video encryption are configured, media file download is limited even when the download URLs are obtained.
If the access control service is configured, downloads from CDN URLs are limited by policies such as Referer-based hotlink protection and IP address blacklist or whitelist. The limits are the same as those for online playback. However, the limits do not apply to the downloads from OSS URLs.
If video encryption is configured, all transcoded stream files that are downloaded are encrypted, no matter whether they are downloaded from OSS URLs or CDN URLs. You must decrypt the transcoded stream files for playback. For more information, see the "Video encryption" section of the Overview topic.
If private OSS storage is used, a download URL has a validity period. If a download URL expires, you must obtain it again. We recommend that you set a long validity period for download URLs.
If URL signing is enabled for the domain name for CDN, a download URL has a validity period. If a download URL expires, you must obtain it again. We recommend that you set a long validity period for download URLs.
Use the console to obtain the download URLs
View download URLs
Audio and video mezzanine files and transcoded stream files:
Log on to the ApsaraVideo VOD console, In the left-side navigation pane, choose Media Files, click Audio/Video or Image, On the Audio/Video or Image page, find the file that you want to manage and click Manage in the Actions column.
On the Video URL tab, click Copy in the Actions column to copy the download URL for a file. You can copy the download URL of the mezzanine file or the transcoded file in each definition.
Image files uploaded to ApsaraVideo VOD:
In the left-side navigation pane, choose Media Files, click Audio/Video, On the Audio/Video page, find the file that you want to manage and click Manage in the Actions column.
On the image details page, click Copy to copy the image URL.
Export download URLs
Audio and video transcoded stream files:
In the left-side navigation pane, choose Media Files, click Audio/Video, On the Audio/Video page, click the
Export Media URL icon in the upper-right corner. The system exports the download URLs for the first 200 video and audio files transcoded in each definition based on the specified filter conditions. Image files uploaded to ApsaraVideo VOD:
In the left-side navigation pane, choose Media Files, click Image, On the Image page, click the
Export Media URL icon in the upper-right corner. The system exports the download URLs for the first 100 images based on the specified filter conditions.
Use the API or SDK to obtain the download URLs
You can download audio and video mezzanine files, transcoded stream files, snapshot files that are automatically generated, and image files. You can use the following operations to obtain the download URLs of required files and download these URLs.
Operation | Description | Reference |
GetMezzanineInfo | Queries the download URL of a mezzanine file. In the Mezzanine object that is returned, the | |
GetPlayInfo | Queries the streaming URL of a transcoded stream file. In the PlayInfo object that is returned, the | |
GetVideoInfo | Queries video information. In the Video object that is returned, the | |
GetImageInfo | Queries image information. In the ImageInfo object that is returned, the | |
SearchMedia | Queries media asset information. If the media asset type is set to video or audio, the media asset information is returned in the Video or Audio object. In the object, the | |
ListSnapshots | Queries snapshot information. In the MediaSnapshot object that is returned, the |
Usage notes:
We recommend that you call API operations by using ApsaraVideo VOD SDK. This helps you obtain media asset information in an efficient manner. For more information about ApsaraVideo VOD SDK, see Usage notes. For more information about API operations, see the
SDK examplesection of API references.You can also send requests over HTTP or HTTPS. For more information, see Request syntax.
Client download
ApsaraVideo Player SDK provides the download feature to allow users to cache audio and video stream files on their mobile terminals and watch the streams offline. You can enable or disable this feature. The Normal and Encrypted download modes are supported.
Download settings
In the left-side navigation pane, choose Configuration Management. Click CDN Configuration > Download. On the Download page , you can set the Download Mode parameter. For more information, see Configure offline download.
Normal: In this mode, downloaded audio and video files are unencrypted. The files can be copied and can be played by using a player. Exercise caution when you set the download mode to Normal.
Encrypted: In this mode, downloaded audio and video files are encrypted by using a key file. The files can be decrypted only by using the same key file. This protects the video copyright. You must use ApsaraVideo Player SDK to decrypt and play the downloaded audio and video files. The ApsaraVideo VOD console provides a tool for generating the private keys for encryption.
ApsaraVideo Player SDK
Both ApsaraVideo Player SDK for iOS and ApsaraVideo Player SDK for Android support the secure download feature. For more information, see Implementation of ApsaraVideo Player SDK for iOS and Implementation of ApsaraVideo Player SDK for Android.