一、AVPlayer监听播放结束，实现循环播放
- 添加播放器播放结束监听
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerItemDidPlayToEndTime:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:nil];
- 在结束访法中seek视频到开始时间点
- (void)playerItemDidPlayToEndTime:(NSNotification *)notification {
[self.player seekToTime:kCMTimeZero]
}
二、AVPlayerLooper循环播放
原生方法，可完全替代方法一
NSURL *url = nil;
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:url];
AVQueuePlayer *player = [AVQueuePlayer queuePlayerWithItems:@[playerItem]];
AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
AVPlayerLooper *playerLooper = [AVPlayerLooper playerLooperWithPlayer:player templateItem:playerItem];
[player play];
三、MPMoviePlayerController实现循环播放
self.url = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"new" ofType:@"mp4"]];
self.player = [[MPMoviePlayerController alloc] initWithContentURL:self.url];
[self.view addSubview:self.player.view];
self.player.shouldAutoplay = YES;
self.player.repeatMode = MPMovieRepeatModeOne;
[self.player.view setFrame:self.view.bounds];
self.player.scalingMode = MPMovieScalingModeAspectFill;
[self.player play];
四、ijkplayer循环播放
使用ijkPlayerDemo中的IJKFFMoviePlayerController做测试，IJKFFMoviePlayerController本身没有循环播放代码，需要手动添加一下。
先在IJKFFMoviePlayerController中添加loop属性，为bool类型，然后在.m文件421行添加相关代码 ijkmp_set_loop
- (void)play
{
if (!_mediaPlayer)
return;
[self setScreenOn:_keepScreenOnWhilePlaying];
[self startHudTimer];
if (self.loop) {
ijkmp_set_loop(_mediaPlayer, INT_MAX);
} else {
ijkmp_set_loop(_mediaPlayer, 1);
}
ijkmp_start(_mediaPlayer);
}
使用方法
self.videoPlayer = [[IJKFFMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:path] withOptions:options];
self.videoPlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
self.videoPlayer.view.frame = self.view.bounds;
self.videoPlayer.loop = YES;
self.videoPlayer.scalingMode = IJKMPMovieScalingModeAspectFill;
self.videoPlayer.shouldAutoplay = YES;
// self.containView.autoresizesSubviews = YES;
[self.view addSubview:self.videoPlayer.view];
[self.videoPlayer prepareToPlay];
[self.videoPlayer play];
一、视频采集流程
1. 初始化采集会话
2. 设置采集设备
3. 设置视频采集输入对象
4. 设置视频采集输出对象及参数
5. 开始采集
6. 采集回调数据处理
初始化采集会话
- (void)setupCaptureSession {
self.captureSession = [AVCaptureSession new];
[self.captureSession beginConfiguration];
if ([self.captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) {
[self.captureSession setSessionPreset:AVCaptureSessionPreset1280x720];
}
[self.captureSession commitConfiguration];
}
设置采集设备
- (void)setupDevice {
// 这里我们获取前置摄像头
self.device = [self captureDeviceWithPosition:(AVCaptureDevicePositionFront)];
// 一般直播16-18，电影24
[self setFPS:16];
}
/// 获取采集设备
- (AVCaptureDevice *)captureDeviceWithPosition:(AVCaptureDevicePosition)position {
AVCaptureDevice *deviceRet = nil;
if (position != AVCaptureDevicePositionUnspecified) {
NSArray<AVCaptureDeviceType> *deviceTypes = @[AVCaptureDeviceTypeBuiltInWideAngleCamera, // 广角镜头
AVCaptureDeviceTypeBuiltInDualCamera]; // 正常情况下是主摄
AVCaptureDeviceDiscoverySession *sessionDiscovery = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:deviceTypes mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionFront];
NSArray<AVCaptureDevice *> *devices = sessionDiscovery.devices;//当前可用的AVCaptureDevice集合
for (AVCaptureDevice *device in devices) {
if ([device position] == position) {
deviceRet = device;
}
}
}
return deviceRet;
}
// 这是设备输出的fps
- (void)setFPS:(NSInteger)fps {
if (fps > 0) {
AVFrameRateRange *frameRateRange = self.device.activeFormat.videoSupportedFrameRateRanges.firstObject;
if(!frameRateRange) {
// 无法获取摄像头
return;
}
if (fps >= frameRateRange.maxFrameRate) {
fps = frameRateRange.maxFrameRate;
} else if (fps <= frameRateRange.minFrameRate) {
fps = frameRateRange.minFrameRate;
}
CMTime frameDuration = CMTimeMake(1 , (int)fps);
[self.captureSession beginConfiguration];
NSError *error = nil;
if ([self.device lockForConfiguration:&error]) {
self.device.activeVideoMaxFrameDuration = frameDuration;
self.device.activeVideoMinFrameDuration = frameDuration;
[self.device unlockForConfiguration];
} else {
// 设置失败
}
[self.captureSession commitConfiguration];
}
}
设置视频采集输入对象
- (void)setupInput {
NSError *error = nil;
self.deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:self.device error:&error];
[self.captureSession beginConfiguration];
if ([self.captureSession canAddInput:self.deviceInput]) {
[self.captureSession addInput:self.deviceInput];
}
[self.captureSession commitConfiguration];
}
设置视频采集输出对象及参数
- (void)setupOutput {
self.deviceOutput = [AVCaptureVideoDataOutput new];
// 输出下一帧时是否丢弃上一帧
self.deviceOutput.alwaysDiscardsLateVideoFrames = YES;
// 输出视频色彩空间为yuv420（也可以为RGB）
self.deviceOutput.videoSettings = @{
(id)kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange]
};
// 设置视频数据输出回调
[self.deviceOutput setSampleBufferDelegate:self queue:self.bufferQueue];
self.captureConnection = [self.deviceOutput connectionWithMediaType:AVMediaTypeVideo];
// 设置输出图像方向
if ([self.captureConnection isVideoOrientationSupported]) {
[self.captureConnection setVideoOrientation:AVCaptureVideoOrientationPortrait];
}
// 设置是否镜像
if ([self.captureConnection isVideoMirroringSupported]) {
[self.captureConnection setVideoMirrored:YES];
}
[self.captureSession beginConfiguration];
if ([self.captureSession canAddOutput:self.deviceOutput]) {
[self.captureSession addOutput:self.deviceOutput];
}
[self.captureSession commitConfiguration];
}
开始采集
- (void)startCatpure {
if (!(self.device && self.deviceInput && self.deviceOutput)) {
return;
}
if (self.captureSession && ![self.captureSession isRunning]) {
[self.captureSession startRunning];
}
}
采集回调数据处理
#pragma mark -- AVCaptureVideoDataOutputSampleBufferDelegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
//获取每一帧图像信息
CVPixelBufferRef pixelBuffer = (CVPixelBufferRef)CMSampleBufferGetImageBuffer(sampleBuffer);
NSLog(@"%@",pixelBuffer);
}
