一、采集设备
1.iphone/ipad 摄像头
2.屏幕采集
二、视频采集方案
1.使用苹果提供AVFoundation框架进行采集
采集步骤：
1.创建捕获会话,必须要强引用，否则会被释放 （采集数据需要新建一个采集会话，且该会话必须强引用，否则会被释放）
AVCaptureSession *captureSession = [[AVCaptureSession alloc] init];
_captureSession = captureSession;
2.寻找相关所需设备
AVCaptureDevice *videoDevice = [self getVideoDevice:AVCaptureDevicePositionFront]
AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
3.基于输入设备生成输入对象，并添加到会话
AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:nil];
AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:nil];
if ([captureSession canAddInput:videoDeviceInput]){
[captureSession addInput:videoDeviceInput];
}
if ([captureSession canAddInput:audioDeviceInput]) {
[captureSession addInput:audioDeviceInput];
}
4.创建输出对象并添加到会话
AVCaptureVideoDataOutput *videoOutput = [[AVCaptureVideoDataOutput alloc] init];
// 注意：队列必须是串行队列，才能获取到数据，而且不能为空，原因参考接口说明
dispatch_queue_t videoQueue = dispatch_queue_create("Video Capture Queue", DISPATCH_QUEUE_SERIAL);
// 设置代理，捕获视频样品数据
[videoOutput setSampleBufferDelegate:self queue:videoQueue];
if ([captureSession canAddOutput:videoOutput]) {
[captureSession addOutput:videoOutput];
}
dispatch_queue_t audioQueue = dispatch_queue_create("Audio Capture Queue", DISPATCH_QUEUE_SERIAL);
// 设置代理，捕获音频样品数据
[audioOutput setSampleBufferDelegate:self queue:audioQueue];
if ([captureSession canAddOutput:audioOutput]) {
[captureSession addOutput:audioOutput];
}
AVCaptureAudioDataOutput *audioOutput = [[AVCaptureAudioDataOutput alloc] init];
dispatch_queue_t audioQueue = dispatch_queue_create("Audio Capture Queue", DISPATCH_QUEUE_SERIAL);
[audioOutput setSampleBufferDelegate:self queue:audioQueue];
if ([captureSession canAddOutput:audioOutput]) {
[captureSession addOutput:audioOutput];
}
5.启动会话
[captureSession startRunning];
6.获取输入设备数据，有可能是音频有可能是视频
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{
//数据保存于sampleBuffer中
if (_videoConnection == connection) {
NSLog(@"采集到视频数据");
} else {
NSLog(@"采集到音频数据");
}
}
demo链接 参考文章https://www.jianshu.com/p/c71bfda055fa
