本文实例为大家分享了iOS使用AVFoundation展示视频的具体代码，供大家参考，具体内容如下
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
//// Capter2ViewController.m// IosTest//// Created by garin on 13-7-19.// Copyright (c) 2013年 garin. All rights reserved.// #import "Capter2ViewController.h" @interface Capter2ViewController ()@end@implementation Capter2ViewController-(void) dealloc{ [session release]; [super dealloc];} - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self;} - (void)viewDidLoad{ [super viewDidLoad]; videoPreviewView=[[UIView alloc] initWithFrame:CGRectMake(10, 10, 320, 200)]; [self.view addSubview:videoPreviewView]; [videoPreviewView release]; // Do any additional setup after loading the view. //在viewdidload调用下面的函数显示摄像信息 [self setupCaptureSession]; // imgView=[[UIImageView alloc] initWithFrame:CGRectMake(10, 230, 320, 100)];// imgView.backgroundColor=[UIColor grayColor];// [self.view addSubview:imgView];// [imgView release]; UIButton *cloeseBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect]; cloeseBtn.frame=CGRectMake(10, 220, 300, 50); [cloeseBtn setTitle:@"Press" forState:UIControlStateNormal]; [cloeseBtn addTarget:self action:@selector(closeBtnClick:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:cloeseBtn];} -(void) closeBtnClick:(id) sender{ [session stopRunning];} - (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.} - (void)setupCaptureSession{ NSError *error = nil; // Create the session session = [[AVCaptureSession alloc] init]; // Configure the session to produce lower resolution video frames, if your // processing algorithm can cope. We'll specify medium quality for the // chosen device. session.sessionPreset = AVCaptureSessionPresetLow; // Find a suitable AVCaptureDevice AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; // Create a device input with the device and add it to the session. AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; if (!input) { // Handling the error appropriately. } [session addInput:input]; // Create a VideoDataOutput and add it to the session AVCaptureVideoDataOutput *output = [[[AVCaptureVideoDataOutput alloc] init] autorelease]; [session addOutput:output]; // Configure your output. dispatch_queue_t queue = dispatch_queue_create("myQueue", NULL); [output setSampleBufferDelegate:self queue:queue]; dispatch_release(queue); // Specify the pixel format output.videoSettings = [NSDictionary dictionaryWithObject: [NSNumber numberWithInt:kCVPixelFormatType_32BGRA] forKey:(id)kCVPixelBufferPixelFormatTypeKey]; // If you wish to cap the frame rate to a known value, such as 15 fps, set // minFrameDuration. //output.minFrameDuration = CMTimeMake(1, 15); //AVCaptureConnection *avcaptureconn=[[AVCaptureConnection alloc] init]; //[avcaptureconn setVideoMinFrameDuration:CMTimeMake(1, 15)]; // Start the session running to start the flow of data [session startRunning]; AVCaptureVideoPreviewLayer* previewLayer = [AVCaptureVideoPreviewLayer layerWithSession: session]; previewLayer.frame = videoPreviewView.bounds; //视频显示到的UIView previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;// [previewLayer setOrientation:AVCaptureVideoOrientationLandscapeRight]; // if(previewLayer.orientationSupported){ // previewLayer.orientation = mOrientation; // } [videoPreviewView.layer addSublayer: previewLayer]; if(![session isRunning]){ [session startRunning]; } // Assign session to an ivar. //[self setSession:session];} //得到视频流- (void)captureOutput:(AVCaptureOutput *)captureOutputdidOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{ // Create a UIImage from the sample buffer data return; UIImage *image = [self imageFromSampleBuffer:sampleBuffer]; //得到的视频流图片 imgView.image=image;} // Create a UIImage from sample buffer data- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer{ // Get a CMSampleBuffer's Core Video image buffer for the media data CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); // Lock the base address of the pixel buffer CVPixelBufferLockBaseAddress(imageBuffer, 0); // Get the number of bytes per row for the pixel buffer void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer); // Get the number of bytes per row for the pixel buffer size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); // Get the pixel buffer width and height size_t width = CVPixelBufferGetWidth(imageBuffer); size_t height = CVPixelBufferGetHeight(imageBuffer); // Create a device-dependent RGB color space CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); // Create a bitmap graphics context with the sample buffer data CGContextRef context = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); // Create a Quartz image from the pixel data in the bitmap graphics context CGImageRef quartzImage = CGBitmapContextCreateImage(context); // Unlock the pixel buffer CVPixelBufferUnlockBaseAddress(imageBuffer,0); // Free up the context and color space CGContextRelease(context); CGColorSpaceRelease(colorSpace); // Create an image object from the Quartz image UIImage *image = [UIImage imageWithCGImage:quartzImage]; // Release the Quartz image CGImageRelease(quartzImage); return (image);} @end |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/yongyinmg/article/details/9379151
