直播获取数据

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection

{

if (_videoConnection == connection) {

NSLog(@"采集到视频数据");

} else {

NSLog(@"采集到音频数据");

}

}

sampleBuffer ——>(视频)yuv420——>h264编码

sampleBuffer——>(音频)pcm——>aac编码

数据合成：flv格式 = h264 + aac