1_xm1n2Wo7zovEnwzCK1KK7A.png

视频镜像问题解决

self.preView.track = self.mediaCapturer.videoTrack;
self.preView.videoView.transform = CGAffineTransformMakeScale(-1.0,1.0);

共享屏幕拉伸变形 （IOS 和安卓）

   造成拉伸的原因是因为采集视频分辨率不统一 造成视频拉伸变形设置统一的分辨率和帧数
 self.capture.captureSession.sessionPreset = [self.capture.captureSession canSetSessionPreset:AVCaptureSessionPreset640x480] ? AVCaptureSessionPreset640x480 : AVCaptureSessionPresetMedium;
           [device lockForConfiguration:NULL];
            @try {
                //设置30帧
                [device setActiveVideoMinFrameDuration:CMTimeMake(1, 30)];
                [device setActiveVideoMaxFrameDuration:CMTimeMake(1, 30)];
            } @catch (NSException *exception) {
                NSLog(@"MediaIOS, 设备不支持所设置的分辨率，错误信息：%@",exception.description);
            } @finally {
                
            }
           [device unlockForConfiguration];

噪音消除设置

 
   //  增加 4个约束 解决回声消除问题 answer内调用传空值
     NSDictionary *mandatoryContraints = @{};
     
     @"OfferToReceiveAudio" : @"true",
     @"OfferToReceiveVideo" : @"true",
     @"googNoiseSuppression": @"true",
     @"googEchoCancellation": @"true"
     

return @{
        @"OfferToReceiveAudio" : @"true",
        @"OfferToReceiveVideo" : @"true",
        @"googNoiseSuppression": @"true",
        @"googEchoCancellation": @"true"
    };

回到主页视频源关闭断开

appdelegate方法里面设置通知监听 
 - (void)applicationWillEnterForeground:(UIApplication *)application {
    if(self.isback){
        self.isback = false;
        [[NSNotificationCenter defaultCenter]postNotificationName:@"Foreground" object:nil];
    }
}
会议中开启视频源
- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.row == 0) {
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            dispatch_async(dispatch_get_global_queue(0, 0), ^{
                [_mediaCapturer startCapture];
            });
        });
    }
}