uniapp modify video

With the development of mobile Internet technology, the scope of video applications is becoming more and more extensive, and when developing video applications, uniapp has become one of the main development frameworks. In uniapp, we can use the video component to implement the video playback function.

However, the video component is not limited to playing videos. We can use uniapp to modify the video component to achieve more functions. Next, this article will introduce the modification of the video component in uniapp.

1. Modify the style of the video component

In uniapp, the default style of the video component may not meet our needs. Therefore, we can modify the style of the video component through CSS. For example, we can set the width of the video component to 100%:

<video style="width: 100%;"></video> 

2. Modify the display controls of the video component

In uniapp, the video component will display some control bars by default, such as playback /Pause button, progress bar, etc. But sometimes we may need to remove part of the control bar, or completely customize the control bar. In this case, we can achieve this by setting the controls attribute of the video component.

By setting the controls attribute to false, you can remove all the default control bars of the video component, for example:

<video :src="videoUrl" controls="false"></video> 

If we need to customize the control bar, we can add a control bar outside the video component , and then use JS code to control the playback, pause and other functions of the video component. For example, we can add a control bar under the video component:

<video :src="videoUrl"></video> 
<div class="custom-controls">
  <button @click="play">播放</button>
  <button @click="pause">暂停</button>
  <button @click="seek(10)">快进10秒</button>
</div>

Then in the JS code, obtain the context object of the video component through the uni.createVideoContext method, and then call the relevant method to implement the custom control bar Function.

export default {
  methods: {
    play() {
      let videoContext = uni.createVideoContext('my-video')
      videoContext.play()
    },
    pause() {
      let videoContext = uni.createVideoContext('my-video')
      videoContext.pause()
    },
    seek(second) {
      let videoContext = uni.createVideoContext('my-video')
      videoContext.seek(second)
    }
  }
}

3. Obtain the metadata of the video component

In uniapp, we can load video files through the video component. After the video file is loaded, we can obtain the context object of the video component by calling the uni.createVideoContext method to obtain the metadata of the video file.

For example, we can get the metadata in the videoInitialized method:

<video :src="videoUrl" @loadedmetadata="videoInitialized"></video> 

Then in the JS code, get the total duration of the video file by calling the getDuration method:

export default {
  methods: {
    videoInitialized() {
      let videoContext = uni.createVideoContext('my-video')
      let duration = videoContext.duration
    }
  }
}

four , Modify the source file of the video component

In uniapp, we can load local video files or network video files through the video component. But sometimes, we need to dynamically modify the source file of the video component at runtime. In this case, we can do it through JS code.

First bind the src attribute of the video component to data:

<video :src="videoUrl"></video> 

Then in the JS code, obtain the context object of the video component by calling the uni.createVideoContext method, and then call the setSrc method To modify the source file of the video component.

export default {
  data() {
    return {
      videoUrl: 'http://example.com/video.mp4'  // 初始视频文件路径
    }
  },
  methods: {
    changeVideoUrl(newUrl) {
      let videoContext = uni.createVideoContext('my-video')
      this.videoUrl = newUrl  // 更新data中的视频文件路径
      videoContext.setSrc(newUrl)  // 修改video组件的源文件
    }
  }
}

Through the above method, we can modify the video component in uniapp. By modifying the video component, we can implement more video application functions, such as customizing control bars, dynamically modifying source files, etc.

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