基于AVCaptureSession的视频录制工具封装
视频输出使用的AVAssetWriter写入沙盒
使用：
//初始化
self.cTool = [CameraTool cameraWithPreView:self.baseView.preView AndFinishShootingBlock:^(NSURL * url) {
//url 视频输出地址
}];
//开始预览并录制（注意下block循环引用问题）
[self.cTool startCapture:^{
//开始录制
[self.cTool startRecord];
//......
//结束录制
[self.cTool stopRecord];
}];
CameraTool.h
//
// CameraTool.h
// mvvm
//
// Created by 朱鑫华 on 2020/8/16.
// Copyright © 2020 朱鑫华. All rights reserved.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
typedef void (^CameraFinishedBlock)(NSURL *);
@interface CameraTool : NSObject
/**
preView - 父容器
block - 结束操作
*/
+(instancetype)cameraWithPreView:(UIView *)preView AndFinishShootingBlock:(CameraFinishedBlock) block;
-(void)startCapture:(void(^)(void))block;
-(void)stopCapture;
-(void)startRecord;
-(void)stopRecord;
@end
NS_ASSUME_NONNULL_END
CameraTool.m
//
// CameraTool.m
// mvvm
//
// Created by 朱鑫华 on 2020/8/16.
// Copyright © 2020 朱鑫华. All rights reserved.
//
#import "CameraTool.h"
#import <AVFoundation/AVFoundation.h>
@interface CameraTool() <AVCaptureVideoDataOutputSampleBufferDelegate,AVCaptureAudioDataOutputSampleBufferDelegate>
@property (nonatomic , strong) AVCaptureSession *captureSession;
@property (nonatomic , strong) AVCaptureDeviceInput *videoInput;
@property (nonatomic , strong) AVCaptureDeviceInput *audioInput;
@property (nonatomic , strong) AVCaptureVideoDataOutput *videoOutput;
@property (nonatomic , strong) AVCaptureAudioDataOutput *audioOutput;
@property (nonatomic , strong) dispatch_queue_t sessionQeue;
@property (nonatomic , strong) AVCaptureVideoPreviewLayer *preViewLayer;
@property (nonatomic , assign) BOOL isRecording;
@property (nonatomic , assign) BOOL canWrite;
@property (nonatomic , strong) AVAssetWriter *writer;
@property (nonatomic , strong) AVAssetWriterInput *writerAudioInput;
@property (nonatomic , strong) AVAssetWriterInput *writerVideoInput;
@property (nonatomic , strong) AVPlayer *player;
@property (nonatomic , strong) AVPlayerLayer *playerLayer;
@property (nonatomic , strong) UIButton *palyBtn;
@property (nonatomic , strong) CALayer *maskLayer;
@property (nonatomic , copy) CameraFinishedBlock shootingFinishBlcok;
@end
@implementation CameraTool
+(instancetype)cameraWithPreView:(UIView *)preView AndFinishShootingBlock:(nonnull CameraFinishedBlock)block{
CameraTool *tool = [[self alloc] initWithPreView:preView];
tool.shootingFinishBlcok = block;
return tool;
}
-(instancetype)initWithPreView:(UIView *)preview{
if (self = [super init]) {
[self initializeDataWithPreView:preview];
}
return self;
}
-(void)initializeDataWithPreView:(UIView *)preView{
_sessionQeue = dispatch_queue_create("cameraQueue", NULL);
_captureSession = [[AVCaptureSession alloc] init];
if ([_captureSession canSetSessionPreset:AVCaptureSessionPresetHigh]) {
[_captureSession setSessionPreset:AVCaptureSessionPresetHigh];
}else if([_captureSession canSetSessionPreset:AVCaptureSessionPresetMedium]){
[_captureSession setSessionPreset:AVCaptureSessionPresetMedium];
}else if ([_captureSession canSetSessionPreset:AVCaptureSessionPresetLow]){
[_captureSession setSessionPreset:AVCaptureSessionPresetLow];
}
_preViewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_captureSession];
_preViewLayer.masksToBounds = YES;
_preViewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
_preViewLayer.frame = preView.bounds;
[preView.layer addSublayer:_preViewLayer];
[self createMaskLayer:preView.bounds];
[self setCaptureInput];
[self setCaptureOutput];
}
-(void)createMaskLayer:(CGRect)rect{
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
_maskLayer = shapeLayer;
UIBezierPath *apath = [UIBezierPath bezierPathWithRoundedRect:rect cornerRadius:0];
[apath appendPath:[UIBezierPath bezierPathWithArcCenter:CGPointMake(rect.size.width * 0.5 , rect.size.height * 0.5) radius:115 startAngle:0 endAngle:2*M_PI clockwise:NO]];
shapeLayer.path = apath.CGPath;
shapeLayer.strokeColor = [UIColor clearColor].CGColor;
shapeLayer.fillColor = [UIColor colorWithWhite:0 alpha:0.3].CGColor;
CAShapeLayer *shape2 = [CAShapeLayer layer];
UIBezierPath *spath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(rect.size.width * 0.5 , rect.size.height * 0.5) radius:115 startAngle:0 endAngle:2*M_PI clockwise:NO];
shape2.path = spath.CGPath;
shape2.strokeColor = ColorHexString(@"#0C2340").CGColor;
shape2.lineWidth = 4;
shape2.fillColor = [UIColor clearColor].CGColor;
[shapeLayer addSublayer:shape2];
}
///输入设置
-(void)setCaptureInput{
//视频输入
AVCaptureDevice *device = [self cameraWithPosition:AVCaptureDevicePositionFront];
self.videoInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
if ([self.captureSession canAddInput:self.videoInput]) {
[self.captureSession addInput:self.videoInput];
}
//音频输入
AVCaptureDevice *audioDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];
self.audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:nil];
if ([self.captureSession canAddInput:self.audioInput]) {
[self.captureSession addInput:self.audioInput];
}
}
///输入设置
-(void)setCaptureOutput{
self.videoOutput = [[AVCaptureVideoDataOutput alloc] init];
[self.videoOutput setVideoSettings:@{
(id)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_32BGRA)
}];
[self.videoOutput setSampleBufferDelegate:self queue:self.sessionQeue];
if ([self.captureSession canAddOutput:self.videoOutput]) {
[self.captureSession addOutput:self.videoOutput];
}
self.audioOutput = [[AVCaptureAudioDataOutput alloc] init];
[self.audioOutput setSampleBufferDelegate:self queue:self.sessionQeue];
if ([self.captureSession canAddOutput:self.audioOutput]) {
[self.captureSession addOutput:self.audioOutput];
}
// AVCaptureConnection *connection = [self.videoOutput connectionWithMediaType:AVMediaTypeVideo];
// // 设置前置摄像头拍照不镜像
// AVCaptureDevicePosition currentPosition=[[self.videoInput device] position];
// if (currentPosition == AVCaptureDevicePositionUnspecified || currentPosition == AVCaptureDevicePositionFront) {
// connection.videoMirrored = YES;
// } else {
// connection.videoMirrored = NO;
// }
}
#pragma mark - 预览相关
-(void)startCapture:(void (^)(void))block{
if (![self.captureSession isRunning]) {
__weak typeof(self) weakSelf = self;
[self->_maskLayer removeFromSuperlayer];
[self->_preViewLayer addSublayer:_maskLayer];
dispatch_async(self.sessionQeue, ^{
[weakSelf.captureSession startRunning];
dispatch_async(dispatch_get_main_queue(), ^{
block();
});
});
}
}
-(void)stopCapture{
if ([self.captureSession isRunning]) {
__weak typeof(self) weakSelf = self;
dispatch_async(self.sessionQeue, ^{
[weakSelf.captureSession stopRunning];
});
}
}
#pragma mark - 拍摄相关
-(void)startRecord{
__weak typeof(self) weakSelf = self;
dispatch_async(self.sessionQeue, ^{
NSURL *fileUrl = [self createVideoPath];
NSFileManager *fm = [NSFileManager defaultManager] ;
BOOL res = [fm removeItemAtURL:fileUrl error:nil];
NSError *error;
//创建AVAssetWriter
weakSelf.writer = [AVAssetWriter assetWriterWithURL:fileUrl fileType:AVFileTypeMPEG4 error:&error];
NSDictionary *dict = @{
AVEncoderBitRatePerChannelKey : @(28000),
AVFormatIDKey : @(kAudioFormatMPEG4AAC),
AVNumberOfChannelsKey : @(1),
AVSampleRateKey : @(22050)
};
NSDictionary *audioOutputSetting = dict;
self.writerAudioInput = [[AVAssetWriterInput alloc] initWithMediaType:AVMediaTypeAudio outputSettings:audioOutputSetting];
//输入是否调整处理成实时数据
self.writerAudioInput.expectsMediaDataInRealTime = YES;
NSDictionary *videoOutputSetting = @{
AVVideoCodecKey : AVVideoCodecH264,
AVVideoWidthKey : @(1280),
AVVideoHeightKey : @(720),
AVVideoCompressionPropertiesKey:@{
AVVideoAverageBitRateKey : @(1280*720*3),
AVVideoExpectedSourceFrameRateKey : @(15),
AVVideoMaxKeyFrameIntervalKey : @(15),
AVVideoProfileLevelKey : AVVideoProfileLevelH264BaselineAutoLevel
}
};
self.writerVideoInput = [[AVAssetWriterInput alloc] initWithMediaType:AVMediaTypeVideo outputSettings:videoOutputSetting];
//输入是否调整处理成实时数据
self.writerVideoInput.expectsMediaDataInRealTime = YES;
//画面需要旋转90度
weakSelf.writerVideoInput.transform = CGAffineTransformMakeRotation(M_PI / 2.0);
if ([weakSelf.writer canAddInput:weakSelf.writerVideoInput]) {
[weakSelf.writer addInput:weakSelf.writerVideoInput];
}
if ([weakSelf.writer canAddInput:weakSelf.writerAudioInput]) {
[weakSelf.writer addInput:weakSelf.writerAudioInput];
}
weakSelf.isRecording = YES;
weakSelf.canWrite = NO;
});
}
-(void)stopRecord{
__weak typeof(self) weakSelf = self;
dispatch_async(self.sessionQeue, ^{
weakSelf.isRecording = NO;
if (weakSelf.writer.status == AVAssetWriterStatusWriting) {
[weakSelf.writerVideoInput markAsFinished];
[weakSelf.writerAudioInput markAsFinished];
[weakSelf.writer finishWritingWithCompletionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^{
//通知代理写入完成，地址：weakSelf.writer.outputURL
NSLog(@"文件地址：%@",weakSelf.writer.outputURL.absoluteString);
[self stopCapture];
if (self.shootingFinishBlcok) {
self.shootingFinishBlcok(weakSelf.writer.outputURL);
}
});
}];
}
});
}
#pragma mark - 视频处理
-(void)captureOutput:(AVCaptureOutput *)output didOutputSampleBuffer:(nonnull CMSampleBufferRef)sampleBuffer fromConnection:(nonnull AVCaptureConnection *)connection{
[self appendSampleBuffer:sampleBuffer];
}
-(void)appendSampleBuffer:(CMSampleBufferRef)sampleBuffer{
if (self.isRecording == NO) {
return;
}
//获取 mediaType
CMTextFormatDescriptionRef formatDes = CMSampleBufferGetFormatDescription(sampleBuffer);
CMMediaType mediaType = CMFormatDescriptionGetMediaType(formatDes);
if (mediaType == kCMMediaType_Video) {
if (!self.canWrite) {
CMTime timestamp = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
if ([self.writer startWriting]) {
// NSLog(@"xie数据");
[self.writer startSessionAtSourceTime:timestamp];
}
self.canWrite = YES;
}
if (self.canWrite && self.writerVideoInput.readyForMoreMediaData) {
// NSLog(@"拼接视频数据");
BOOL success = [self.writerVideoInput appendSampleBuffer:sampleBuffer];
if (!success) {
// NSLog(@"写入失败");
}
}
}else if (mediaType == kCMMediaType_Audio){
if (self.writerAudioInput.readyForMoreMediaData) {
// NSLog(@"拼接饮品数据");
BOOL success = [self.writerAudioInput appendSampleBuffer:sampleBuffer];
if (!success) {
// NSLog(@"==yinpin写入失败");
}
}
}
}
-(NSURL *)createVideoPath{
NSString *random = @"faceAuth";//NSString stringWithFormat:@"video%d_%d",arc4random()%999999,(int)[[NSDate date] timeIntervalSince1970] % 10000];
NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat: @"%@.mp4",random]];
return [NSURL fileURLWithPath:path];
}
- (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition)position
{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for ( AVCaptureDevice *device in devices )
if ( device.position == position )
return device;
return nil;
}
-(void)dealloc{
NSLog(@"%s dealloc",__func__);
}
@end
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