一、LFLiveKit
github地址：https://github.com/LaiFengiOS/LFLiveKit
本地rtmp服务建立可以看：https://www.jianshu.com/p/561df087fd4d
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框架支持h264、AAC编码，动态改变速率，RTMP传输，美颜，差网丢帧，动态水印，接入硬件流媒体数据等。
核心类
LFLiveSession：封装了AVFoundation中录制视频的功能。
LFLiveVideoConfiguration：设置视频流分辨率，码率，帧率等。
LFLiveAudioConfiguration：设置音频码率，采样率，声道数等。
默认视频质量 -- 分辨率： 360 *640 , 帧数：24 , 码率：800Kps。
默认音频质量 -- 采样率: 44.1KHz, 码率: 96Kbps。
- (LFLiveSession*)session {
if (!_session) {
//默认音视频配置
_session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:[LFLiveVideoConfiguration defaultConfiguration]];
_session.reconnectCount = 5;//重连次数
_session.saveLocalVideo = YES;
_session.saveLocalVideoPath = [NSURL fileURLWithPath:localVideoPath];
_session.preView = self.view;
_session.delegate = self;
}
return _session;
}
//开始直播
- (void)startLive {
LFLiveStreamInfo *streamInfo = [LFLiveStreamInfo new];
streamInfo.url = rtmpUrl;
[self.session startLive:streamInfo];
}
//结束直播
- (void)stopLive {
[self.session stopLive];
}
LFLiveSessionDelegate
//推流状态改变
- (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange: (LFLiveState)state{
NSString* stateStr;
switch (state) {
case LFLiveReady:
stateStr = @"准备";
break;
case LFLivePending:
stateStr = @"连接中";
break;
case LFLiveStart:
stateStr = @"已连接";
break;
case LFLiveStop:
stateStr = @"已断开";
break;
case LFLiveError:
stateStr = @"连接出错";
break;
case LFLiveRefresh:
stateStr = @"正在刷新";
break;
default:
break;
}
self.liveStateLabel.text = stateStr;
}
//推流信息
- (void)liveSession:(nullable LFLiveSession *)session debugInfo:(nullable LFLiveDebug*)debugInfo{
}
//推流错误信息
- (void)liveSession:(nullable LFLiveSession*)session errorCode:(LFLiveSocketErrorCode)errorCode{
switch (errorCode) {
case LFLiveSocketError_PreView:
NSLog(@"预览失败");
break;
case LFLiveSocketError_GetStreamInfo:
NSLog(@"获取流媒体信息失败");
break;
case LFLiveSocketError_ConnectSocket:
NSLog(@"连接socket失败");
break;
case LFLiveSocketError_Verification:
NSLog(@"验证服务器失败");
break;
case LFLiveSocketError_ReConnectTimeOut:
NSLog(@"重新连接服务器超时");
break;
default:
break;
}
}
闪光灯，前后置的切换
//前后置切换
AVCaptureDevicePosition devicePositon = self.session.captureDevicePosition;
self.session.captureDevicePosition = (devicePositon == AVCaptureDevicePositionBack) ? AVCaptureDevicePositionFront : AVCaptureDevicePositionBack;
self.session.torch =!self.session.torch;//闪光灯开关
二、自定义滤镜
基础推流功能配置完成，但是如果需要自定义滤镜，LFLiveKit框架只做了美颜调节，无法自定义滤镜，所以可以更改源码来做。
首先找到类：LFVideoCapture
修改.h添加一个属性
@property (nonatomic, strong) GPUImageOutput<GPUImageInput>* _Nullable currentFilter;
然后在.m中添加
-(void)setCurrentFilter:(GPUImageOutput<GPUImageInput> *)currentFilter{
_currentFilter = currentFilter;
[self reloadFilter];
}
再修改reloadFilter方法
- (void)reloadFilter{
[self.filter removeAllTargets];
[self.blendFilter removeAllTargets];
[self.uiElementInput removeAllTargets];
[self.videoCamera removeAllTargets];
[self.output removeAllTargets];
[self.cropfilter removeAllTargets];
self.output = [[LFGPUImageEmptyFilter alloc] init];
if (!self.beautyFace) {
if (self.currentFilter) {
self.filter = _currentFilter;
self.beautyFilter = _currentFilter;
}else{
self.filter = [[LFGPUImageEmptyFilter alloc] init];
self.beautyFilter = nil;
}
}else{
self.filter = [[LFGPUImageBeautyFilter alloc] init];
self.beautyFilter = (LFGPUImageBeautyFilter*)self.filter;
}
///< 调节镜像
[self reloadMirror];
//< 480*640 比例为4:3 强制转换为16:9
if([self.configuration.avSessionPreset isEqualToString:AVCaptureSessionPreset640x480]){
CGRect cropRect = self.configuration.landscape ? CGRectMake(0, 0.125, 1, 0.75) : CGRectMake(0.125, 0, 0.75, 1);
self.cropfilter = [[GPUImageCropFilter alloc] initWithCropRegion:cropRect];
[self.videoCamera addTarget:self.cropfilter];
[self.cropfilter addTarget:self.filter];
}else{
[self.videoCamera addTarget:self.filter];
}
//< 添加水印
if(self.warterMarkView){
[self.filter addTarget:self.blendFilter];
[self.uiElementInput addTarget:self.blendFilter];
[self.blendFilter addTarget:self.gpuImageView];
if(self.saveLocalVideo) [self.blendFilter addTarget:self.movieWriter];
[self.filter addTarget:self.output];
[self.uiElementInput update];
}else{
[self.filter addTarget:self.output];
[self.output addTarget:self.gpuImageView];
if(self.saveLocalVideo) [self.output addTarget:self.movieWriter];
}
[self.filter forceProcessingAtSize:self.configuration.videoSize];
[self.output forceProcessingAtSize:self.configuration.videoSize];
[self.blendFilter forceProcessingAtSize:self.configuration.videoSize];
[self.uiElementInput forceProcessingAtSize:self.configuration.videoSize];
//< 输出数据
__weak typeof(self) _self = self;
[self.output setFrameProcessingCompletionBlock:^(GPUImageOutput *output, CMTime time) {
[_self processVideo:output];
}];
}
然后在LFLiveSession.m中添加方法
-(void)setCurrentFilter:(GPUImageOutput<GPUImageInput> *)currentFilter{
[self willChangeValueForKey:@"currentFilter"];
[self.videoCaptureSource setCurrentFilter:currentFilter];
[self didChangeValueForKey:@"currentFilter"];
}
然后在LFLiveSession.h中添加属性
@property (nonatomic, strong) GPUImageOutput<GPUImageInput>* _Nullable currentFilter;
这样就可以自定义滤镜了。
焦点的原理是一样，在LFVideoCapture类中添加方法
- (void)setFocusPoint:(CGPoint)point{
BOOL ret;
if (!self.videoCamera.captureSession) return;
AVCaptureSession *session = (AVCaptureSession *)self.videoCamera.captureSession;
[session beginConfiguration];
if (self.videoCamera.inputCamera) {
if (self.videoCamera.inputCamera.torchAvailable) {
NSError *err = nil;
if ([self.videoCamera.inputCamera lockForConfiguration:&err]) {
if ([self.videoCamera.inputCamera isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
[self.videoCamera.inputCamera setFocusMode:AVCaptureFocusModeAutoFocus];
}
if ([self.videoCamera.inputCamera isFocusPointOfInterestSupported]) {
[self.videoCamera.inputCamera setFocusPointOfInterest:point];
}
if ([self.videoCamera.inputCamera isExposureModeSupported:AVCaptureExposureModeAutoExpose]) {
[self.videoCamera.inputCamera setExposureMode:AVCaptureExposureModeAutoExpose];
}
if ([self.videoCamera.inputCamera isExposurePointOfInterestSupported]) {
[self.videoCamera.inputCamera setExposurePointOfInterest:point];
}
} else {
NSLog(@"Error while locking device for torch: %@", err);
ret = false;
}
} else {
NSLog(@"Torch not available in current camera input");
}
}
[session commitConfiguration];
_torch = ret;
}
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