Updated on 2022-10-24 GMT+08:00


VOD ingests media files and transcodes these files for playback on a wide range of devices. It is widely used for online education, web portals, social networking, and catch-up TV. Table 1 describes the functions of the VOD service.

Table 1 Functions




Media upload


  • Supported video formats: MP4, TS, MOV, MXF, FLV, MPG, WMV, AVI, F4V, M4V, HLS, and MPEG
  • Supported audio formats: MP3, OGG, WAV, WMA, APE, FLAC, AAC, AC3, MMF, AMR, M4A, M4R, WV, and MP2

Upload methods

  • Media files can be uploaded through the console. Three upload modes are available: local upload, pull from URLs, and OBS hosting.
  • A PC batch upload tool is provided to migrate media files from the local PC or OBS to VOD. Currently, the tool is available in Windows and Linux.
  • APIs for file upload and server SDKs in Java, Python, Go, Node.js, .Net, and PHP languages are provided.

Upload rules

  • Each video file is split into multiple small files (20 MB by default) and uploaded to VOD.
  • The timeout interval for uploading a small file is 60 minutes.

Media management

Category management

You can create categories and manage uploaded audio and video files by category.

Thumbnail management

  • The first frame of video can be taken automatically as your video thumbnail.
  • You can also upload a thumbnail in JPG or PNG format from your local PC.
  • You can take a snapshot and save it as your video thumbnail.

Subtitle management

You can upload SRT subtitle files in UTF-8.

Video publish

After a video is published, a specific URL is generated. Your users can watch the video through the URL.

CDN pre-loading

You can pre-load media files on your domain name to CDN nodes for a better playback experience.

Media processing


  • Supported input file formats: MP4, TS, MOV, FLV, MPG, MXF, WMV, ADTS, AVI, MKV, and MPEG
  • Supported video codecs: H.264, H.265, MPEG-2, MPEG-4, MJPEG, WMV1/2/3, and ProRes 422
  • Supported input audio codecs: AAC, AC3, EAC3, HE-AAC, MP2, MP3, PCM (s161e, s16be, s241e, s24be, DVD), and WMA
  • Supported output file formats: DASH, HLS, MP4, MP3, and ADTS
  • Supported output codecs: H.264, H.265, HE_AAC, AAC, and MP3

Video watermark

You can add watermarks in PNG, JPG, and JPEG formats to videos. The maximum size of a watermark is 100 MB.

Audio extraction

You can extract audio from video files and save it as MP3 format.

Snapshot capturing

You can take snapshots from videos and save them as JPG files.

  • By interval: Take snapshots at regular intervals. The default interval is 12s.
  • At fixed time: Take snapshots at specified time points.


Packaging only changes media format without changing the resolution and bitrate. You can:

  • Package media files in FLV and HLS formats into MP4.
  • Package media files in MP4, FLV, and MP3 formats into HLS.

Content moderation

The system checks the compliance of uploaded media files.

Media acceleration and playback

Custom domain name

The configured VOD domain names can be used for media file distribution acceleration.

Hotlink protection

You can configure referer validation and URL validation to protect your resources to be distributed.

Security management

Referer validation

You can configure referer blacklist and whitelist to control who can or cannot access your VOD resources and to prevent hotlinking.

URL validation

You can configure the key to control who can or cannot access your VOD resources and to prevent hotlinking.

HLS encryption

HLS videos can be encrypted using AES128 to prevent VOD resource leakage and link theft.

HTTPS secure acceleration

  • HTTPS secure acceleration is supported.
  • Forcible redirection to HTTPS and HTTP 2.0 is supported.

VOD console


  • You can view data such as VOD resource usage.
  • You can change the CDN billing option.

Media file management

  • You can transcode, pre-load, categorize, export, and delete media files, and cancel transcoding.
  • You can extract audio from video files.
  • You can upload a thumbnail and subtitles for a video file.
  • You can view the audio and video playback addresses, subtitles, and thumbnail information.

Video Processing

  • You can take snapshots from videos.
  • You can select a workflow to process media files.

Content Moderation

The system checks the compliance of uploaded media files.

Audio and Video Uploads

Audio and video files can be uploaded from your local PC or obtained from the URL.


You can view resource usage on CDN and your origin server, and view most requested content.

Global Settings

You can configure transcoding templates, watermark templates, HLS encryption, notifications, and workflows.

Domain Name Management

You can add your own domain name, and configure the CNAME, HTTPS secure acceleration, and hotlink protection for the domain name.

Audio and Video Hosting

You can authorize VOD to host media files in your OBS bucket and use transcoding and frame capture to process these files.

Short video

You can purchase, download, and manage short video materials, including themes, filters, stickers, subtitles, transition effects, and particle effects.


Media upload

APIs for media file upload are available, including local upload, replicating files from OBS to VOD, OBS hosting, and pull from URLs.

Media management

APIs for querying, publishing, canceling, deleting, and modifying media are available.

CDN pre-loading

A media pre-load API is provided to prefetch media files by ID or URL.

Media processing

APIs for video processing (transcoding, snapshot capturing, and HLS encryption), thumbnail setting, and media file review are available.


APIs for creating, deleting, modifying, and querying categories are available.


APIs for querying CDN statistics, VOD origin server statistics, and most requested content are available.

Key query

The HLS encryption key can be queried.


Server SDK

Functions such as media upload, processing, management, pre-loading, and distribution are available.

Short video SDK

The Android and iOS short video SDKs are provided to support HD recording, multi-track and multi-segment editing, filters, animation, and stickers.