Help & DocumentationContent Delivery NetworkManagement DescriptionConfiguration ManagementAccess ControlVideo Dragging Configuration
Contents：
- Video dragging generally happens during on-demand video. When a user drags the video progress bar, a request similar to the one as shown below will be sent to the server:
http://www.test.com/test.flv?start=10
In this case, data will be returned starting from the 10th byte. Video files in VOD scenarios are all cached on various CDN nodes; therefore, the nodes can directly respond to such requests once this configuration is enabled. - When enabling video dragging, you need to enable the ignore query string feature too, and the origin server must support range requests. Files in MP4, FLV and TS are supported:
| File Type | meta Information | start Parameter Description | Sample Request |
|---|---|---|---|
| MP4 | For a video on the origin server, the meta information must be located in the file header. Videos with meta information located at the file end are not supported | The start parameter specifies a time (in seconds) and uses decimal to specify a millisecond (for example, start = 1.01 means that the starting time is at 1.01s). CDN will locate the last key frame before the time specified by the start parameter (if start is not a key frame) | http://www.test.com/demo.mp4?start=10 The video will be played back starting from the 10th second |
| FLV | The video on the origin server must have meta information | The start parameter specifies a byte. CDN will automatically locate the last key frame before the byte specified by the start parameter (if start is not a key frame) | http://www.test.com/demo.flv?start=10 The video will be played back starting from the 10th byte |
| TS | No special requirements | The start parameter specifies a time (in seconds) and uses decimal to specify a millisecond (for example, start = 1.01 means that the starting time is at 1.01s). CDN will locate the last key frame before the time specified by the start parameter (if start is not a key frame) | http://www.test.com/demo.ts?start=10 The video will be played back starting from the 10th second |
Configuration Guide
- Log in to the CDN Console and click Domain Management on the left sidebar to enter the management page.
- Find the domain name you want to edit and click Manage in the operation column.
- Click the Access Control tab and configure the Video Dragging module.
Video dragging is disabled by default.
- Toggle the video dragging switch on. If the Ignore Query String feature is disabled, enabling video dragging will automatically enable that feature.
