使用GPUImage拍照添加滤镜
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
//拍照添加滤镜
//1.添加按钮拍照
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake((self.view.bounds.size.width-80)*0.5, self.view.bounds.size.height-120, 80, 40);
button.backgroundColor = [UIColor blueColor];
[button setTitle:@"拍照" forState:UIControlStateNormal];
[button addTarget:self action:@selector(takePhoto) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
[self.view bringSubviewToFront:button];
//2.照相机添加滤镜
[self addFilterCamera];
}
- (void)addFilterCamera {
//1.获取照相机，AVCaptureSessionPreset640x480照片尺寸，AVCaptureDevicePositionFront前置摄像头
_sCamera = [[GPUImageStillCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionFront];
//2.切换摄像头
[_sCamera rotateCamera];
//3.竖屏
_sCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
//4.初始化滤镜---灰度滤镜
_grayFilter = [[GPUImageGrayscaleFilter alloc] init];
[_sCamera addTarget:_grayFilter];
//5.显示在GPUImageView
_gpuImageView = [[GPUImageView alloc] initWithFrame:self.jingImageView.frame];
[_grayFilter addTarget:_gpuImageView];
[self.view addSubview:_gpuImageView];
//6.开始拍照
[_sCamera startCameraCapture];
}
- (void)takePhoto {
//7.拍照后处理照片，添加相册
[_sCamera capturePhotoAsJPEGProcessedUpToFilter:_grayFilter withCompletionHandler:^(NSData *processedJPEG, NSError *error) {
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
[[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:processedJPEG options:nil];
} completionHandler:^(BOOL success, NSError * _Nullable error) {
}];
//获取拍摄的图片预览
UIImage *newImage = [UIImage imageWithData:processedJPEG];
[self.view bringSubviewToFront:self.jingImageView];
self.jingImageView.image = newImage;
}];
}
使用GPUImage拍视频添加滤镜
VideoManager.h
@protocol videoDelegate <NSObject>
- (void)didStartRecordVideo;
- (void)didCompressingVideo;
- (void)didEndRecordVideoWithTime:(CGFloat)totalTime outputFile:(NSString *)filePath;
@end
@interface VideoManager : NSObject
@property (nonatomic, assign) CGRect frame;
@property (nonatomic, weak) id<videoDelegate> delegate;
- (void)showWithFrame:(CGRect *)rect superView:(UIView *)view;
- (void)startRecording;
- (void)stopRecording;
@end
VideoManager.m
//视频录制单例
+ (instancetype)manager {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_manager = [[VideoManager alloc] init];
});
return _manager;
}
//开始录制
- (void)startRecording {
//录制路径
NSString *defaultPath = [self getVideoPathCache];
self.moviePath = [defaultPath stringByAppendingPathComponent:[self getVideoNameWithType:@"mp4"]];
self.movieUrl = [NSURL fileURLWithPath:self.moviePath];
self.movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:self.movieUrl size:CGSizeMake(480, 640)];
self.movieWriter.encodingLiveVideo = YES;
self.movieWriter.shouldPassthroughAudio = YES;
[self.saturationFilter addTarget:self.movieWriter];
self.videoCamera.audioEncodingTarget = self.movieWriter;
//开始录制
[self.movieWriter startRecording];
if (self.delegate && [self.delegate respondsToSelector:@selector(didStartRecordVideo)]) {
[self.delegate didStartRecordVideo];
}
[self.timer setFireDate:[NSDate distantPast]];
[self.timer fire];
}
//结束录制
- (void)stopRecording {
if (self.videoCamera) {
[self.timer invalidate];
self.timer = nil;
[self.movieWriter finishRecording];
//移除滤镜
[self.saturationFilter removeTarget:self.movieWriter];
self.videoCamera.audioEncodingTarget = nil;
if (self.recordSecond > self.maxTime) {
//可以清除录制的内容
}else {
//压缩视频
if (self.delegate && [self.delegate respondsToSelector:@selector(didCompressingVideo)]) {
[self.delegate didCompressingVideo]; //提示正在压缩
}
//开始压缩
__weak typeof(self) weakSelf = self;
[self compressVideoWithUrl:self.movieUrl compressionType:AVAssetExportPresetMediumQuality filePath:^(NSString *resultPath, float memorySize, NSString *videoImagePath, int seconds){
NSData *data = [NSData dataWithContentsOfFile:resultPath];
CGFloat totalTime = (CGFloat)data.length/1024/1024;
if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(didEndRecordVideoWithTime:outputFile:)]) {
[weakSelf.delegate didEndRecordVideoWithTime:totalTime outputFile:resultPath];
}
}];
}
}
}
- (void)compressVideoWithUrl:(NSURL *)url compressionType:(NSString *)type filePath:(void(^)(NSString *resultPath, float memorySize, NSString *videoImagePath, int seconds))resultBlock {
NSString *resultPath;
// 视频压缩前大小
NSData *data = [NSData dataWithContentsOfURL:url];
CGFloat totalSize = (float)data.length / 1024 / 1024;
NSLog(@"压缩前大小：%.2fM",totalSize);
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
CMTime time = [avAsset duration];
// 视频时长
int seconds = ceil(time.value / time.timescale);
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:type]) {
// 中等质量
AVAssetExportSession *session = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];
// 用时间给文件命名 防止存储被覆盖
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
// 若压缩路径不存在重新创建
NSFileManager *manager = [NSFileManager defaultManager];
BOOL isExist = [manager fileExistsAtPath:COMPRESSEDVIDEOPATH];
if (!isExist) {
[manager createDirectoryAtPath:COMPRESSEDVIDEOPATH withIntermediateDirectories:YES attributes:nil error:nil];
}
resultPath = [COMPRESSEDVIDEOPATH stringByAppendingPathComponent:[NSString stringWithFormat:@"user%outputVideo-%@.mp4",arc4random_uniform(10000),[formatter stringFromDate:[NSDate date]]]];
session.outputURL = [NSURL fileURLWithPath:resultPath];
session.outputFileType = AVFileTypeMPEG4;
session.shouldOptimizeForNetworkUse = YES;
[session exportAsynchronouslyWithCompletionHandler:^{
switch (session.status) {
case AVAssetExportSessionStatusUnknown:
break;
case AVAssetExportSessionStatusWaiting:
break;
case AVAssetExportSessionStatusExporting:
break;
case AVAssetExportSessionStatusCancelled:
break;
case AVAssetExportSessionStatusFailed:
break;
case AVAssetExportSessionStatusCompleted:{
NSData *data = [NSData dataWithContentsOfFile:resultPath];
// 压缩过后的大小
float compressedSize = (float)data.length / 1024 / 1024;
resultBlock(resultPath,compressedSize,@"",seconds);
NSLog(@"压缩后大小：%.2f",compressedSize);
}
default:
break;
}
}];
}
}
- (void)showWithFrame:(CGRect)frame superView:(UIView *)superView {
_frame = frame;
[self.saturationFilter addTarget:self.displayView];
[self.videoCamera addTarget:self.saturationFilter];
[superView addSubview:self.displayView];
[self.videoCamera startCameraCapture];
}
#pragma mark - 摄像头输出
- (void)willOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer {
//返回已经添加滤镜的sampleBuffer
}
VideoViewController.m
- (void)setupVideoManager {
_manager = [[VideoManager alloc] init];
_manager.delegate = self;
[_manager showWithFrame:CGRectMake(20, 120, LMW, LMH) superView:self.view];
}
- (void)shootVideo {
[_manager startRecording];
}
- (void)stopVideo {
[_manager stopRecording];
}
- (void)playVideo {
_player = [[AVPlayerViewController alloc] init];
_player.player = [[AVPlayer alloc] initWithURL:[NSURL fileURLWithPath:_filePath]];
_player.videoGravity = AVLayerVideoGravityResizeAspect;
[self presentViewController:_player animated:NO completion:nil];
}
- (void)didStartRecordVideo {
NSLog(@"开始录制");
}
- (void)didCompressingVideo {
NSLog(@"视频压缩中");
}
- (void)didEndRecordVideoWithTime:(CGFloat)totalTime outputFile:(NSString *)filePath {
NSLog(@"录制完毕---%f秒，%@", totalTime, filePath);
_filePath = filePath;
}
