最近在某个技术交流群中,有人问怎么完成视频截图。本文简单介绍下怎么使用Media3完成视频截图功能。

增加依赖

在app module下的build.gradle中增加代码,如下:

dependencies {
    implementation("androidx.media3:media3-ui:1.1.0")
    implementation("androidx.media3:media3-session:1.1.0")
    implementation("androidx.media3:media3-exoplayer:1.1.0")
}

完成视频截图功能

TextureView供给了获取视频截图的方法getBitmap(),可以获取Bitmap.Config.ARGB_8888像素格式的图片,图片的宽高与TextureView的宽高共同。

  • 设置PlayerViewsurface_type

在布局文件中将PlayerViewsurface_type设置为texture_view

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    ......
    <androidx.media3.ui.AspectRatioFrameLayout
        android:id="@+id/arfl_player_container"
        android:layout_width="match_parent"
        android:layout_height="320dp"
        android:layout_marginTop="10dp"
        app:layout_constraintTop_toBottomOf="@id/btn_screenshot">
        <androidx.media3.ui.PlayerView
            android:id="@+id/play_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:resize_mode="fill"
            app:show_buffering="always"
            app:surface_type="texture_view"
            app:use_controller="false" />
    </androidx.media3.ui.AspectRatioFrameLayout>
    ......
</androidx.constraintlayout.widget.ConstraintLayout>
  • 生成截图

经过PlayViewgetVideoSurfaceView()获取TextureView,并生成截图,代码如下:

class Media3ExampleActivity : AppCompatActivity() {
    private lateinit var binding: LayoutMedia3ExampleActivityBinding
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = LayoutMedia3ExampleActivityBinding.inflate(layoutInflater)
        setContentView(binding.root)
        binding.includeTitle.tvTitle.text = "Media3 Example"
        binding.playView.player = ExoPlayer.Builder(this)
            .build()
        binding.playView.player?.run {
            addListener(object : Player.Listener {
                ......
            })
            repeatMode = Player.REPEAT_MODE_ALL
            playWhenReady = true
        }
        binding.btnPlaySingleVideo.setOnClickListener {
            binding.playView.player?.run {
                stop()
                setMediaItem(MediaItem.fromUri("https://minigame.vip/Uploads/images/2021/09/18/1631951892_page_img.mp4"))
                prepare()
            }
        }
        binding.btnScreenshot.setOnClickListener {
            // 获取TextureView并生成截图
            (binding.playView.videoSurfaceView as? TextureView)?.bitmap?.let {
                binding.ivScreenshotContainer.setImageBitmap(it)
            }
        }
    }
    override fun onResume() {
        super.onResume()
        binding.playView.onResume()
    }
    override fun onPause() {
        super.onPause()
        binding.playView.onPause()
    }
    override fun onDestroy() {
        super.onDestroy()
        binding.playView.player?.release()
        binding.playView.player = null
    }
}

作用如图:

Android Media3(五)— 实现视频截图功能

示例

演示代码已在示例Demo中增加。

ExampleDemo github

ExampleDemo gitee