# Video Playback


The **\<Video>** component is used to play a video and control its playback. It is usually used in video players and video list pages within applications. A video automatically plays once fully loaded. When the user clicks the video area, the video is paused and the playback progress bar is displayed. The user can drag the progress bar to the desired position. For details, see [Video](../reference/arkui-ts/ts-media-components-video.md).


## Creating a \<Video> Component

You can create a **\<Video>** component by calling the following API:


```ts
Video(value: {src?: string | Resource, currentProgressRate?: number | string | PlaybackSpeed, previewUri?: string | PixelMap | Resource, controller?: VideoController})
```

Creates a **\<Video>** component. In this API, **src** indicates the path of the video source, **currentProgressRate** indicates the video playback speed, **previewUri** indicates the path of the preview image, and **controller** indicates the video controller . For details about how to load a video, see [Loading a Video](#loading-a-video).


## Loading Video

The **\<Video>** component supports both local and online videos.


### Loading a Local Video

- Common local video
  To load a local video, specify the corresponding video file in the local **rawfile** directory, as shown in the following figure.

  ![en-us_image_0000001562700409](figures/en-us_image_0000001562700409.png)

  Use **$rawfile()** to reference the video resource.

  ```ts
  @Component
  export struct VideoPlayer{
     private controller:VideoController;
     private previewUris: Resource = $r ('app.media.preview');
     private innerResource: Resource = $rawfile('videoTest.mp4');
     build(){
       Column() {
         Video({
           src: this.innerResource,
           previewUri: this.previewUris,
           controller: this.controller
         })
     }
   }
  }
  ```


- Video provided by a [DataAbility](../application-models/dataability-overview.md), whose path contains the **dataability://** prefix<br>Ensure that the corresponding video resource exists.

  ```ts
  @Component
  export struct VideoPlayer{
     private controller:VideoController;
     private previewUris: Resource = $r ('app.media.preview');
     private videosrc: string= 'dataability://device_id/com.domainname.dataability.videodata/video/10'
     build(){
       Column() {
         Video({
           src: this.videosrc,
           previewUri: this.previewUris,
           controller: this.controller
         })
     }
   }
  }
  ```


### Loading an Online Video

To load online videos, you must apply for the **ohos.permission.INTERNET** permission. For details about how to apply for the permission, see [Declaring Permissions](../security/accesstoken-guidelines.md). In this scenario, the **src** attribute indicates the URL of the online video.


```ts
@Component
export struct VideoPlayer{
   private controller:VideoController;
   private previewUris: Resource = $r ('app.media.preview');
   private videosrc: string= 'https://www.example.com/example.mp4' // Replace the URL with that of the actual video to load.
   build(){
     Column() {
       Video({
         src: this.videosrc,
         previewUri: this.previewUris,
         controller: this.controller
       })
   }
 }
}
```


## Adding Attributes

Use the [attributes](../reference/arkui-ts/ts-media-components-video.md#attributes) of the **\<Video>** component to control video playback. For example, you can set whether to mute the video and whether to display the video playback control bar.


```ts
@Component
export struct VideoPlayer {
  private controller: VideoController;

  build() {
    Column() {
      Video({
        controller: this.controller
      })
        .muted(false) // Set whether to mute the video.
        .controls(false) // Set whether to display the video playback control bar.
        .autoPlay(false) // Set whether to enable auto play.
        .loop(false) // Set whether to repeat the video.
        .objectFit(ImageFit.Contain) // Set the video scale type.
    }
  }
}
```


## Adding Events

  The **\<Video>** component supports various callback events in addition to the universal events. For details, see [Events](../reference/arkui-ts/ts-media-components-video.md#events).

```ts
@Entry
@Component
struct VideoPlayer{
  private controller:VideoController;
  private previewUris: Resource = $r ('app.media.preview');
  private innerResource: Resource = $rawfile('videoTest.mp4');
  build(){
    Column() {
      Video({
        src: this.innerResource,
        previewUri: this.previewUris,
        controller: this.controller
      })
        .onUpdate((event) => {   // Triggered when the playback progress changes.
          console.info("Video update.");
        })
        .onPrepared((event) => {  // Triggered when video preparation is complete.
          console.info("Video prepared.");
        })
        .onError(() => {          // Triggered when the video playback fails.
          console.info("Video error.");
        })
    }
  }
}
```


## Using the Video Controller

The video controller is used to control video playback. For details, see [VideoController](../reference/arkui-ts/ts-media-components-video.md#videocontroller).

- Default controller
  The default controller supports four basic features: start playback, pause playback, set the video playback position, and play the video in full screen.

  ```ts
  @Entry
  @Component
  struct VideoGuide {
    @State videoSrc: Resource = $rawfile('videoTest.mp4')
    @State previewUri: string = 'common/videoIcon.png'
    @State curRate: PlaybackSpeed = PlaybackSpeed.Speed_Forward_1_00_X
      build() {
      Row() {
        Column() {
          Video({
            src: this.videoSrc,
            previewUri: this.previewUri,
            currentProgressRate: this.curRate
          })
        }
        .width('100%')
      }
      .height('100%')
    }
  }
  ```

- Custom controller
  To use a custom controller, disable the default controller, and then use components such as \<Button> and \<Slider> to customize the control and display. This type of controller is applicable to scenarios where customization requirements are involved.

  ```ts
  @Entry
  @Component
  struct VideoGuide {
    @State videoSrc: Resource = $rawfile('videoTest.mp4')
    @State previewUri: string = 'common/videoIcon.png'
    @State curRate: PlaybackSpeed = PlaybackSpeed.Speed_Forward_1_00_X
    @State isAutoPlay: boolean = false
    @State showControls: boolean = true
    @State sliderStartTime: string = '';
    @State currentTime: number = 0;
    @State durationTime: number = 0;
    @State durationStringTime: string ='';
    controller: VideoController = new VideoController()

    build() {
      Row() {
        Column() {
          Video({
            src: this.videoSrc,
            previewUri: this.previewUri,
            currentProgressRate: this.curRate,
            controller: this.controller
          }).controls(false).autoPlay(true)
          .onPrepared((event)=>{
            this.durationTime = event.duration
          })
          .onUpdate((event)=>{
            this.currentTime =event.time
          })
          Row() {
            Text(JSON.stringify(this.currentTime) + 's')
            Slider({
              value: this.currentTime,
              min: 0,
              max: this.durationTime
            })
            .onChange((value: number, mode: SliderChangeMode) => {
                this.controller.setCurrentTime(value);
              }).width("90%")
            Text(JSON.stringify(this.durationTime) + 's')
          }
          .opacity(0.8)
          .width("100%")
        }
        .width('100%')
      }
      .height('40%')
    }
  }
  ```


## Remarks

The **\<Video>** component has encapsulated the basic capabilities of video playback. You do not need to create video instances or set and obtain video information. Simply set the data source and basic information to play videos. To customize video playback, see [Video Playback](../media/video-playback.md).