How to use PHP to implement scrolling playback of videos in WeChat mini programs

The number of users of WeChat mini programs has been growing, and the video scrolling playback function is used more and more frequently, which makes many developers want to implement their own video scrolling playback function. This article will introduce how to use PHP to implement scrolling playback of videos in WeChat mini programs.

1. Video scrolling playback function in WeChat mini program

The video scrolling playback function based on WeChat mini program can usually be implemented in the video list page. Users can slide the page to view different videos. A quick tour of the video. Normally, clicking on a video will pop up the video details page, where you can play, pause, fast forward, rewind and other operations on the video. The difficulty in implementing scrolling playback of videos in WeChat mini programs is how to render high-quality video thumbnails when processing the video list, and process video playback events to achieve an excellent user experience.

2. PHP implements the video scrolling playback function in the WeChat applet

1. Rendering video thumbnails

Generate video thumbnails through PHP code It is relatively simple and can be implemented through the FFmpeg library. The FFmpeg library is a very powerful library for processing audio and video data. It can be used for audio and video format conversion, audio and video decoding, encoding, editing, etc. To generate thumbnails, developers need to upload the video to the server first, then use the FFmpeg library to take screenshots to generate thumbnails, and finally store the thumbnail address and video address in the database. In this way, developers can easily generate and store video thumbnails.

The following is a sample code for using the FFmpeg library to generate thumbnails:

function videoShot($url,$time){
    $shot_file = time().rand(10000,99999).'.jpg';//生成临时文件名

    $cmd = "/usr/local/ffmpeg/bin/ffmpeg -i ".$url." -ss ".$time." -f image2 -y -s 720*480 {$shot_file}";

    exec($cmd);//运行指令

    if(!file_exists($shot_file)){
        return false;
    }

    return $shot_file;//返回缩略图地址
}

2. Implement the video playback event

Implement the video playback function in the WeChat applet Requires the use of Video component. The Video component is a special component provided by WeChat applet, which can be used to play audio and video files. The video playback event can be monitored through the bindplay event of the Video component, and developers can handle it as needed.

The following is a sample code for the Video component:

<video id="myVideo" src="{{videoUrl}}" bindplay="play"></video>

The video playback event can be monitored through the bindplay event. The videoUrl attribute in the Video component is the video address. Developers can use this attribute to add the video The address is bound to the Video component.

The following is the sample code of bindplay's event processing function:

play: function(){
    //TODO: 视频播放事件处理
}

In the event processing function, developers can add some business logic, such as recording video playback duration, counting video playback times, etc. At the same time, you can also control video playback, pause, fast forward, rewind and other functions through other methods.

3. Summary

Through the introduction of this article, developers can use PHP to implement the video scrolling playback function in WeChat mini programs. Through the introduction of the FFmpeg library, the generation and storage of video thumbnails can be achieved more easily. At the same time, developers can also handle video playback events by using the bindplay event processing function in the Video component.

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