Question

我在Xamarin Android上使用ExoPlayer。

我想要什么：

通过代码创建ExoPlayer并在屏幕外加载视频
将第一帧渲染到屏幕外并暂停
在屏幕外捕获第一帧的位图
将位图加载到屏幕上的ImageView
隐藏ImageView并在屏幕上恢复视频播放

exoPlayer = new SimpleExoPlayer.Builder(UI.Player.Context).Build();
var listener = new PlayerListener();
listener.init(ExoPlayer_RenderedFirstFrame); // my callback method
exoPlayer.AddListener(listener);
exoPlayer.AddVideoListener(listener);

// Draw offscreen in surface
GLES30.GlEnable(GLES11Ext.GlTextureExternalOes);
GLES30.GlGenTextures(1, _textures, 0);
GLES30.GlBindTexture(GLES11Ext.GlTextureExternalOes, _textures[0]);

GLES30.GlBindTexture(GLES11Ext.GlTextureExternalOes, 0);
surfaceTexture = new SurfaceTexture(_textures[0], true);
surface = new Surface(surfaceTexture);


exoPlayer.SetVideoSurface(surface);
exoPlayer.Prepare(buildMediaSourceNew(videoUri));
exoPlayer.PlayWhenReady = true;


 private void ExoPlayer_RenderedFirstFrame()
            { 
exoPlayer.PlayWhenReady = false;
                usePixelCopy(surface, pixelCopyCallback);
            }

 public void pixelCopyCallback(Bitmap bitmap)
            {              
                UI.Player.Context.RunOnUiThread(() =>
                {
                    var drawable = new BitmapDrawable(UI.Player.Context.Resources, bitmap);
                    drawable.SetAntiAlias(true);
                    imageFrame.SetImageDrawable(drawable);
                });
            }

上面的代码正在工作。但是，如何将渲染重定向到UI？ Surface不是UI控件。我找不到将现有的Surface或SurfaceTexture添加到UI的方法：-（

如何使用ExoPlayer在屏幕外渲染然后在屏幕上渲染

0 个答案: