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GpuImage简单使用

2024-08-13 22:39:24   217人阅读

 声明变量

@interface **********{    GPUImageVideoCamera *Camera;    GPUImageOutput *Filters;    GPUImageView *CameraShowView;}

首先是Camera,一种是GPUImageStillCamera,另一个种为GPUImageVideoCamera.正如其命名,如果只是拍照使用前者.录制视频使用后者.

    //init, 第一个参数分辨率 第二个参数,前后摄像头选择    Camera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionFront];    Camera.outputImageOrientation = UIInterfaceOrientationPortrait;    Camera.horizontallyMirrorFrontFacingCamera = NO;    Camera.horizontallyMirrorRearFacingCamera = NO;

其次camera获取视频(图片)后,加以滤镜也就是filter, filter可以叠加,也可以自定义(比如美颜).

    //黑白滤镜    Filters = [GPUImageColorPackingFilter new];    //将将滤镜加至摄像头    [Camera addTarget:Filters];

最后输出处理后的视频或图片,这里可以可以直接输出至屏幕,也可以使用GPUImageMovieWriter,也就是录制了.

    //用于显示视频的GPUImageView    CameraShowView =   [[GPUImageView alloc] initWithFrame:CGRectMake(0, 64,self.view.frame.size.width,self.view.frame.size.width*1.25)];    [CameraShowView setInputRotation:kGPUImageFlipHorizonal atIndex:0];    CameraShowView.fillMode = kGPUImageFillModePreserveAspectRatioAndFill;    [self.view addSubview:CameraShowView];    //将视频输出到->CameraShowView    [Filters addTarget:CameraShowView];

当然也不要忘记启动

    //视频启动    [Camera startCameraCapture];

 

其他

//前后摄像头切换-(void)VideoPosition:(UIButton*)Button{    [Camera rotateCamera];        Button.selected = !Button.selected;}//闪关灯-(void)LightBtn:(UIButton*)Btn{        if (Camera.inputCamera.position == AVCaptureDevicePositionBack) {                if (Btn.selected) {                        [Camera.inputCamera lockForConfiguration:nil];            [Camera.inputCamera setTorchMode:AVCaptureTorchModeOff];            [Camera.inputCamera unlockForConfiguration];                    }else{                        [Camera.inputCamera lockForConfiguration:nil];            [Camera.inputCamera setTorchMode:AVCaptureTorchModeOn];            [Camera.inputCamera unlockForConfiguration];        }        Btn.selected = !Btn.selected;            }else{                NSLog(@"当前使用前置摄像头,未能开启闪光灯");            }    }

 

未完待续,算是挖坑. 后续也就是滤镜切换,视频的简单剪辑...

 

GpuImage简单使用


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