Question

我想在运行时获取远程用户（远程流）的屏幕截图，我试图通过远程视图将当前CurrentImageContext作为UIGraphicsBeginImageContextWithOptions(myRemoteView.bounds.size, myRemoteView.opaque, 0.0f)的{{1}}参数，但是在运行时捕获时我得到了空白屏幕，任何关于如何进行操作的线索这个问题？我使用的是最新版本的Quickblox，ios 10和xcode 8。

当远程用户连接时，此方法称为回调，

（void）session：（QBRTCSession *）session receivedRemoteVideoTrack：（QBRTCVideoTrack *）videoTrack fromUser：（NSNumber *）userID {

QBRTCVideoTrack * remoteVideoTrak = [self.session remoteVideoTrackWithUserID：@（user.ID）]; QBRTCRemoteVideoView * remoteVideoView = [[QBRTCRemoteVideoView alloc] init]; remoteVideoView.frame = self.remoteVV.bounds;
```
[myRemoteView drawViewHierarchyInRect:myRemoteView.bounds afterScreenUpdates:YES]
```

}

我wana捕捉'self.remoteVV'作为截图，但它总是给我一个黑色的图像。

Answer 1

您可以尝试使用此代码在同一视频会议中拍摄远程流的屏幕截图。它对我有用。

UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 2.0f);
        [self drawViewHierarchyInRect:self.bounds afterScreenUpdates:YES];
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

Answer 2

This helped me to capture the StreamView.

func captureScreen() -> UIImage? {
        guard let streamView = conferenceStreamView else { return nil }
        UIGraphicsBeginImageContextWithOptions(streamView.bounds.size, false, 0);
        streamView.drawHierarchy(in: streamView.bounds, afterScreenUpdates: true)
        let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return image
    }

如何从Quickblox iOS中的远程视频捕获视频帧

2 个答案: