如何让RTCEAGLVideoView不变形全屏显示

Question

我正在使用 RTCEAGLVideoView 显示 RTCVideoTrack，并希望它是全屏的，但它总是变形。我尝试使用 AVMakeRectWithAspectRatioInsideRect 方法来显示此视图，没有失真但也没有全屏，这是我的代码。

RTCEAGLVideoView *remoteVideoView = [[RTCEAGLVideoView alloc] initWithFrame:self.backView.bounds];
remoteVideoView.contentMode = UIViewContentModeScaleAspectFill;
_remoteVideoView = remoteVideoView;
[remoteVideoView renderFrame:nil];
[remoteVideoTrack addRenderer:remoteVideoView];
remoteVideoView.delegate = self;
self.remoteVideoTrack = remoteVideoTrack;
[self.backView addSubview:remoteVideoView];

当 didChangeVideoSize 委托调用时：

- (void)videoView:(RTCEAGLVideoView*)videoView didChangeVideoSize:(CGSize)size {
    if (videoView == _remoteVideoView) {
        _remoteVideoSize = size;
    }
    CGRect bounds = self.view.bounds;
    if (_remoteVideoSize.width > 0 && _remoteVideoSize.height > 0) {
        // Aspect fill remote video into bounds.
        CGRect remoteVideoFrame =
        AVMakeRectWithAspectRatioInsideRect(_remoteVideoSize, bounds);
        CGFloat scale = 1;
        if (remoteVideoFrame.size.width > remoteVideoFrame.size.height) {
            // Scale by height.
            scale = bounds.size.height / remoteVideoFrame.size.height;
        } else {
            // Scale by width.
            scale = bounds.size.width / remoteVideoFrame.size.width;
        }
        remoteVideoFrame.size.height *= scale;
        remoteVideoFrame.size.width *= scale;
        _remoteVideoView.frame = remoteVideoFrame;
        _remoteVideoView.center =
        CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
    } else {
        _remoteVideoView.frame = bounds;
    }
}

我想知道 renderFrame 的方法是否可以做一些有用的事情，但我找不到如何创建 RTCI420Frame 属性。

Answer 1

您可以使用 RTCMTLVideoView 设置 contentMode（全屏）。

进口：

#import <WebRTC/RTCMTLVideoView.h>

在此处使用此代码：

#if defined(RTC_SUPPORTS_METAL)
       
 RTCMTLVideoView *mtlVideoView = [[RTCMTLVideoView alloc] initWithFrame:CGRectZero];
 mtlVideoView.videoContentMode = UIViewContentModeScaleAspectFill;
    
#else

//Here you can create RTCEAGLVideoView