背景
我正在尝试以中心裁剪方式显示视频(就像在 ImageView 上一样)。
我也希望我能找到如何以其他方式扩展规模,就像上所做的那样这个图书馆 https://github.com/yqritc/Android-ScalableVideoView.
问题
我用它来达到这个目的:
player!!.videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING
但由于某种原因,它不进行中心裁剪。
我尝试过的
查看文档,我看到了这一点:
“请注意,缩放模式仅适用于启用基于 MediaCodec 的视频渲染器且输出表面归 SurfaceView 所有的情况。”
所以我尝试在 XML 文件中设置它:
app:surface_type="surface_view"
但这也没有帮助。我也没有看到它在代码中可用。
我尝试搜索此类的任何带有“渲染器”或“编解码器”的内容,但不存在。
这是我使用的代码(基于此:https://github.com/yusufcakmak/ExoPlayerSample https://github.com/yusufcakmak/ExoPlayerSample ) :
class MainActivity : AppCompatActivity() {
val VIDEO_URL = "https://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_1mb.mp4"
private var player: SimpleExoPlayer? = null
private var window: Timeline.Window? = null
private var mediaDataSourceFactory: DataSource.Factory? = null
private var trackSelector: DefaultTrackSelector? = null
private var shouldAutoPlay: Boolean = false
private var bandwidthMeter: BandwidthMeter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
shouldAutoPlay = true
bandwidthMeter = DefaultBandwidthMeter()
mediaDataSourceFactory = DefaultDataSourceFactory(this, Util.getUserAgent(this, "mediaPlayerSample"), bandwidthMeter as TransferListener<in DataSource>)
window = Timeline.Window()
}
private fun initializePlayer() {
if (player != null)
return
simpleExoPlayerView.requestFocus()
val videoTrackSelectionFactory = AdaptiveTrackSelection.Factory(bandwidthMeter)
trackSelector = DefaultTrackSelector(videoTrackSelectionFactory)
player = ExoPlayerFactory.newSimpleInstance(this, trackSelector)
simpleExoPlayerView.player = player
player!!.repeatMode = Player.REPEAT_MODE_ALL
player!!.playWhenReady = shouldAutoPlay
player!!.videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING
val extractorsFactory = DefaultExtractorsFactory()
val mediaSource = ExtractorMediaSource(Uri.parse(VIDEO_URL), mediaDataSourceFactory, extractorsFactory, null, null)
player!!.prepare(mediaSource)
}
private fun releasePlayer() {
if (player != null) {
shouldAutoPlay = player!!.getPlayWhenReady()
player!!.release()
player = null
trackSelector = null
}
}
public override fun onStart() {
super.onStart()
if (Util.SDK_INT > 23) {
initializePlayer()
}
}
public override fun onResume() {
super.onResume()
if (Util.SDK_INT <= 23 || player == null) {
initializePlayer()
}
}
public override fun onPause() {
super.onPause()
if (Util.SDK_INT <= 23) {
releasePlayer()
}
}
public override fun onStop() {
super.onStop()
if (Util.SDK_INT > 23) {
releasePlayer()
}
}
}
活动主文件
<com.google.android.exoplayer2.ui.SimpleExoPlayerView
android:id="@+id/simpleExoPlayerView" 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"
android:focusable="true" app:surface_type="surface_view"/>
manifest
<uses-permission android:name="android.permission.INTERNET"/>
梯度文件
implementation 'com.google.android.exoplayer:exoplayer:r2.5.2'
问题
我所做的有什么问题吗?
第一个要求到底是什么?
我觉得这个版本的SDK有点旧了。我应该如何更新它?也许这是一个错误并且已修复?