小编yin*_*huo的帖子

我正在尝试在webRTC中更改本地视频分辨率。我使用以下方法创建本地视频跟踪器：

-(RTCVideoTrack *)createLocalVideoTrack {
   RTCVideoTrack *localVideoTrack = nil;
   RTCMediaConstraints *mediaConstraints = [[RTCMediaConstraints alloc] initWithMandatoryConstraints:nil                                                                        optionalConstraints:nil];
   RTCAVFoundationVideoSource *source =
   [self.factory avFoundationVideoSourceWithConstraints:mediaConstraints];
   localVideoTrack =
   [self.factory videoTrackWithSource:source
                           trackId:@"ARDAMSv0"];
   return localVideoTrack;
}

我将强制性约束设置如下，但是它不起作用：

@{@"minFrameRate":@"20",@"maxFrameRate":@"30",@"maxWidth":@"320",@"minWidth":@"240",@"maxHeight":@"320",@"minHeight":@"240"};

有人可以帮我吗？