在android中调整视频显示中纵横比变化的表面视图
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Resizing surface view for aspect ratio change in video display in android
提问by Kevin K
I am working on a video conferencing project. My video display is using surface view. Now during a video call there is a chance of aspect ratio change for the incoming frames. So i have tried the following code for it
我正在做一个视频会议项目。我的视频显示正在使用表面视图。现在，在视频通话期间，传入帧的纵横比可能会发生变化。所以我已经尝试了以下代码
public void surfaceResize() {
// WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point size = new Point();
int screenWidth = 0;
//Get the SurfaceView layout parameters
float aspectRatio = (float) recv_frame_width / recv_frame_height;
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
{
//Get the width of the screen
getWindowManager().getDefaultDisplay().getSize(size);
screenWidth = size.x;
//Set the width of the SurfaceView to the width of the screen
surflp.width = screenWidth;
//Set the height of the SurfaceView to match the aspect ratio of the video
//be sure to cast these as floats otherwise the calculation will likely be 0
surflp.height = (int) ((1 / aspectRatio) * (float)screenWidth);
//Commit the layout parameters
} else {
size.x = size.y = 0;
//Get the width of the screen
getWindowManager().getDefaultDisplay().getSize(size);
int screenHeight = size.y;
//Set the width of the SurfaceView to the width of the screen
surflp.height = screenHeight;
//Set the width of the SurfaceView to match the aspect ratio of the video
//be sure to cast these as floats otherwise the calculation will likely be 0
surflp.width = (int) ( aspectRatio * (float)screenHeight);
//Commit the layout parameters
// code to do for Portrait Mode
}
surflp.addRule(RelativeLayout.CENTER_HORIZONTAL);
surflp.addRule(RelativeLayout.CENTER_VERTICAL);
if(myVideoSurfaceView != null)
myVideoSurfaceView.setLayoutParams(surflp);
System.out.println("Surface resized*****************************************");
}
Everything is fine if I call this function at beginning of call. My problem is when I call this function in between a call for changing aspect ratio it takes too much time to display the next frame. Sometimes the video gets stuck even.
如果我在通话开始时调用这个函数，一切都很好。我的问题是，当我在更改纵横比的调用之间调用此函数时，显示下一帧需要太多时间。有时视频甚至会卡住。
I tried to destroy and recreate the surface with
我试图破坏和重建表面
myVideoSurface.setVisibility(VIEW.GONE);
But the surface is not getting created.
但是表面没有被创建。
I am using Mediacodec for video decode I will get notified when there is a resolution change.
我正在使用 Mediacodec 进行视频解码，当分辨率发生变化时我会收到通知。
Is there something more I should do for resizing a surfaceView when already video is being played.
当已经播放视频时，我还应该做些什么来调整surfaceView的大小。
Thanks for help.........................
感谢帮助.........................
回答by kyogs
Hello try with below code:
您好，请尝试使用以下代码：
private void setVideoSize() {
// // Get the dimensions of the video
int videoWidth = mediaPlayer.getVideoWidth();
int videoHeight = mediaPlayer.getVideoHeight();
float videoProportion = (float) videoWidth / (float) videoHeight;
// Get the width of the screen
int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
int screenHeight = getWindowManager().getDefaultDisplay().getHeight();
float screenProportion = (float) screenWidth / (float) screenHeight;
// Get the SurfaceView layout parameters
android.view.ViewGroup.LayoutParams lp = surfaceView.getLayoutParams();
if (videoProportion > screenProportion) {
lp.width = screenWidth;
lp.height = (int) ((float) screenWidth / videoProportion);
} else {
lp.width = (int) (videoProportion * (float) screenHeight);
lp.height = screenHeight;
}
// Commit the layout parameters
surfaceView.setLayoutParams(lp);
}
回答by Nasib
This problem can be solved like this.
这个问题可以这样解决。
