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Stage 5. Play back a long video

Last updated: 2022-09-15 17:44:58

    This document describes how to use the superplayer to play back long videos common on audio/video platforms. It covers the web, iOS, and Android versions of the superplayer and also details the features of automatic adaptive bitstream switch, video thumbnail preview, and video timestamping.

    Overview

    After reading this document, you will know:

    • How to output adaptive bitstreams in VOD (a player can dynamically select the most appropriate bitrate for playback based on the current bandwidth).
    • How to set video timestamps.
    • How to use image sprite as thumbnail in VOD.
    • How to use the player.

    Before reading this document, make sure that you have read Stage 1. Play back a video with superplayer in the Superplayer Guide and understood the fileid concept of VOD.

    Directions

    Step 1. Output adaptive bitstream and image sprite

    This step describes how to transcode a video to adaptive bitstream and output image sprite.

    1. Log in to the VOD console, select Video Processing > Template Settings > Adaptive Bitrate Streaming, and click Create Template.

      Create the adaptive bitstream through the template as needed. This document creates an adaptive bitrate streaming template named testAdaptive, which contains three substreams with a resolution of 480p, 720p, and 1080p respectively. The video bitrate, video frame rate, and audio bitrate remain the same as the original video.
    2. Select Video Processing > Template Settings > Screenshot**

      Create the image sprite through the template as needed. This document creates an image sprite template named testSprite, with a sampling interval of 5%, 10 subimage rows, and 10 subimage columns.
    3. Add the adaptive bitrate streaming and image sprite templates through the task flow.
      Select Video Processing > Task Flow Settings > Create Task Flow

      Add a task through the task flow as needed. To demonstrate the process of playing back adaptive bitstreams, this document creates a task flow named testPlayVideo, which only adds the adaptive bitrate streaming and image sprite templates.
    4. Select Media Assets > Video Management on the left sidebar. Select the video to process, click Process Video, select Task Flow, and choose a task flow template.
    5. You can click Manage in the Operation column to view the processing result.

    Step 2. Add video timestamps

    This step describes how to add a set of video timestamps.

    1. Go to VOD Server APIs > Media Asset Management APIs > ModifyMediaInfo and click Debug to enter the TencentCloud API console for debugging.
    2. Add the specified video timestamps through the AddKeyFrameDescs.N parameter.

      At this point, you have completed the operation in the cloud, output the adaptive bitstreams and image sprite, and added the video timestamps.

    Step 3. Integrate the player

    This step describes how to play back the adaptive bitstreams, thumbnails, and timestamps in the superplayer for web, iOS, and Android.

    You need to integrate the RT-Cube Player as instructed in Superplayer. After importing the player's SDK file, you can get the appId and fileId of media asset files from Video Management for playback.

    The construction method of the player is TCPlayer, which can be used to create a player instance for playback.

    1. Place the player container in the HTML file

    Place the player container in the desired place on the page. For example, add the following code to index.html (the container ID, width, and height can be customized).

    <video id="player-container-id" width="414" height="270" preload="auto" playsinline webkit-playsinline>
    </video>
    

    2. Play back with the fileID

    Add the following initialization script to the index.html page initialization code to pass in the obtained fileID and appID for playback.

    var player = TCPlayer('player-container-id', { // `player-container-id` is the player container ID, which must be the same as that in HTML
      fileID: '5285890799710670616', // Pass in the `fileID` of the video to be played back, which is required
      appID: '1400329073' // Pass in the `appID` of the VOD account, which is required
    });
    

    Summary

    At this point, you can view the image sprite and video timestamps and automatically switch dynamic adaptive bitstreams in the player. For more features, see Feature Description.

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