iOS开发-美颜相机、短视频(GPUImage的使用)

修改了GPUImage导入的方式,也解决了视频编辑后出现90旋转的问题。
网上流行的美颜滤镜有很多,我的demo里有两款美颜滤镜(GPUImageBeautifyFilterFSKGPUImageBeautyFilter)。
我本意是准备写一个相册管理的,最后由于项目需求,写成了短视频处理,所以项目名字没改,demo下面会给出,只是给大家一个相关思路,不惜勿喷。下面直接上我demo里比较重要的几个地方:
短视频功能使用的是GPUImageVideoCamera,由于项目里需要使用1:1,所以使用了滤镜GPUImageCropFilter,大家如果有需要,可以更高这个滤镜的设置,下面给出相机的设置代码:

//相机设置
- (void)customSystemSession {
    WS(weakSelf)
    self.imgView = [UIImageView new];
    self.imgView.clipsToBounds = YES;
    [self.view addSubview:self.imgView];
    [self.imgView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(weakSelf.topView.mas_bottom).offset(0);
        make.left.equalTo(weakSelf.view.mas_left).offset(0);
        make.right.equalTo(weakSelf.view.mas_right).offset(0);
        make.height.mas_equalTo(SCREEN_WIDTH);
    }];
    
    //美颜相机
    self.kj_videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset1280x720 cameraPosition:AVCaptureDevicePositionBack];
    self.kj_videoCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
    self.kj_videoCamera.horizontallyMirrorFrontFacingCamera = YES;
    self.kj_filterView = [[GPUImageView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_WIDTH)];
    self.kj_filterView.fillMode = kGPUImageFillModePreserveAspectRatioAndFill;
    //    self.filterView.center = self.view.center;
    [self.imgView addSubview:self.kj_filterView];
    
    
//    //剪裁滤镜(1:1)如果有需要全屏,这里需要做出更改或者直接去掉这个滤镜
    self.kj_cropFilter = [[GPUImageCropFilter alloc] initWithCropRegion:CGRectMake(0, 44/SCREEN_HEIGHT, 1, SCREEN_WIDTH/SCREEN_HEIGHT)];
    //美颜(默认开启美颜)
    self.kj_beautifyFilter = [[FSKGPUImageBeautyFilter alloc] init];
    self.kj_beautifyFilter.beautyLevel = 0.9f;//美颜程度
    self.kj_beautifyFilter.brightLevel = 0.7f;//美白程度
    self.kj_beautifyFilter.toneLevel = 0.9f;//色调强度
    
//    self.kj_filter = [[GPUImageSaturationFilter alloc] init];
//    //滤镜组
//    self.kj_filterGroup = [[GPUImageFilterGroup alloc] init];
//    [self.kj_filterGroup addFilter:self.kj_cropFilter];
//    [self.kj_filterGroup addFilter:self.kj_beautifyFilter];
    
//    [self openBeautify];

    [self.kj_videoCamera addAudioInputsAndOutputs];
    [self.kj_videoCamera addTarget:self.kj_cropFilter];
    [self.kj_cropFilter addTarget:self.kj_beautifyFilter];
    [self.kj_beautifyFilter addTarget:self.kj_filterView];
    
    [self.kj_videoCamera startCameraCapture];
}

对于相机的前后镜头切换、闪光灯等等这里就不做说明了,对于短视频我的处理方案是多段视频合并,用GPUImageVideoCamera来录制多段视频,带美颜滤镜,其实这里是可以直接使用实时滤镜的,但是由于公司只需要美颜,所以这里没做其它滤镜的处理(实际上和美颜滤镜的切换时一样的道理,所以实时滤镜实际上是在每段视频拍摄前选好滤镜后addTarget就好了,当然啦,如果是混合使用后,要先删除(removeTarget)后添加),但是在后续我单独写了一个视频的简单编辑功能,那里有对于本地视频、图片增加滤镜的处理,后续会讲到,接下来放上短视频中最重要的部分,视频合并:

//确定(完成)
- (void)onCompleteAction:(UIButton *)sender {
    if (self.kj_videoArray.count > 0) {
        if (self.kj_videoArray.count > 1) {
            //需要合并多段视频
            if (!self.kj_outPath) {
                self.kj_outPath = [self getVideoOutPath];//合成后的输出路径
            }
            //判断本地是否已有合成后的视频文件
            if ([[NSFileManager defaultManager] fileExistsAtPath:self.kj_outPath]) {
                //如果存在就删除,重新合成
                [[NSFileManager defaultManager] removeItemAtPath:self.kj_outPath error:nil];
            }
            //音视频合成工具
            AVMutableComposition *kj_composition = [AVMutableComposition composition];
            //音频
            AVMutableCompositionTrack *kj_audioTrack = [kj_composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
            //视频
            AVMutableCompositionTrack *kj_videoTrack = [kj_composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
            //开始合成
            [KJUtility showProgressDialogText:@"视频处理中..."];
            CMTime kj_totalDuration = kCMTimeZero;
            for (int i = 0; i < self.kj_videoArray.count; i ++) {
                NSDictionary *localDict = self.kj_videoArray[i];
                NSDictionary* options = @{AVURLAssetPreferPreciseDurationAndTimingKey:@YES};
                
                AVAsset *kj_asset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:localDict[@"path"]] options:options];
                //获取kj_asset中的音频
                NSArray *audioArray = [kj_asset tracksWithMediaType:AVMediaTypeAudio];
                AVAssetTrack *kj_assetAudio = audioArray.firstObject;
                //向kj_audioTrack中加入音频
                NSError *kj_audioError = nil;
                BOOL isComplete_audio = [kj_audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, kj_asset.duration)
                                                               ofTrack:kj_assetAudio
                                                                atTime:kj_totalDuration
                                                                 error:&kj_audioError];
                NSLog(@"加入音频%d  isComplete_audio:%d error:%@", i, isComplete_audio, kj_audioError);
                
                //获取kj_asset中的视频
                NSArray *videoArray = [kj_asset tracksWithMediaType:AVMediaTypeVideo];
                AVAssetTrack *kj_assetVideo = videoArray.firstObject;
                //向kj_videoTrack中加入视频
                NSError *kj_videoError = nil;
                BOOL isComplete_video = [kj_videoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, kj_asset.duration)
                                                               ofTrack:kj_assetVideo
                                                                atTime:kj_totalDuration
                                                                 error:&kj_videoError];
                NSLog(@"加入视频%d  isComplete_video:%d error:%@", i, isComplete_video, kj_videoError);
                
                kj_totalDuration = CMTimeAdd(kj_totalDuration, kj_asset.duration);
            }
            //这里可以加水印的,但在这里不做水印处理
            
            //视频导出处理
            AVAssetExportSession *kj_export = [AVAssetExportSession exportSessionWithAsset:kj_composition
                                                                                presetName:AVAssetExportPreset1280x720];
            kj_export.outputURL = [NSURL fileURLWithPath:self.kj_outPath];
            kj_export.outputFileType = AVFileTypeMPEG4;
            kj_export.shouldOptimizeForNetworkUse = YES;
            WS(weakSelf)
            [kj_export exportAsynchronouslyWithCompletionHandler:^{
                dispatch_async(dispatch_get_main_queue(), ^{
                    [KJUtility hideProgressDialog];
                    if (weakSelf.kjFileDelegate && [weakSelf.kjFileDelegate respondsToSelector:@selector(kj_videoFileCompleteLocalPath:)]) {
                        //合成视频成功后,删除小段视频
                        [weakSelf clearAllVideo];
                        NSLog(@"%@",weakSelf.kj_outPath);
                        [weakSelf.kjFileDelegate kj_videoFileCompleteLocalPath:weakSelf.kj_outPath];
                    } else {
                        [weakSelf saveVideoToLibrary];
                    }
                });
            }];
        } else {
            //只有一段视频
            [KJUtility hideProgressDialog];
            NSDictionary *dict = self.kj_videoArray.firstObject;
            self.kj_outPath = dict[@"path"];
            if (self.kjFileDelegate && [self.kjFileDelegate respondsToSelector:@selector(kj_videoFileCompleteLocalPath:)]) {
                [self.kjFileDelegate kj_videoFileCompleteLocalPath:self.kj_outPath];
            } else {
                [self saveVideoToLibrary];
            }
        }
    }
}

注释都说的很清楚了,就不对代码做相关解释了,最主要的还是AVMutableCompositionAVMutableCompositionTrackAVMutableCompositionTrack的简单实用,百度一下就能看到相关属性的说明,其它的就和普通相机的处理没什么不同的。
另一个方面,就是视频的剪辑了,大家对于上传服务器的视频,由于时间太长或者是视频太大,这就需要对视频进行压缩和裁剪处理,这里对于时间的选取UI层上不做说明了,可以看的demo里的UI处理,下面给出视频剪裁的代码:

- (void)onCompleteButtonAction:(UIButton *)sender {
    
    //开始剪裁
    [self.kj_player pause];
    //开始时间
    CMTime startTime = CMTimeMakeWithSeconds((self.collectionView.contentOffset.x+self.btnStart.frame.origin.x)*self.pixel_time, self.kj_player.currentItem.duration.timescale);
    //长度
    CGFloat length = (self.btnEnd.frame.origin.x+self.btnEnd.frame.size.width-self.btnStart.frame.origin.x)*self.pixel_time;
    CMTime time_total = [self.kj_player.currentItem duration];
    if (length == 1.0*time_total.value/time_total.timescale) {
        if (self.kj_videoCapturedelegate && [self.kj_videoCapturedelegate respondsToSelector:@selector(kj_didCaptureCompleteForPath:)]) {
            AVURLAsset *urlAsset = (AVURLAsset *)self.kj_player.currentItem.asset;
            [self.kj_videoCapturedelegate kj_didCaptureCompleteForPath:urlAsset.URL.path];
        } else {
            [self onCancelButtonAction:nil];
        }
        return;
    }
    
    [KJUtility showProgressDialogText:@"开始处理"];
    if (length > self.kj_maxTime) {
        length = self.kj_maxTime;
    }
    CMTime videoLenth = CMTimeMakeWithSeconds(length, self.kj_player.currentItem.duration.timescale);
    
    CMTimeRange videoTimeRange = CMTimeRangeMake(startTime, videoLenth);
    AVAssetExportSession * exportSession = [[AVAssetExportSession alloc] initWithAsset:self.kj_player.currentItem.asset presetName:AVAssetExportPresetMediumQuality];
    exportSession.timeRange = videoTimeRange;
    NSString *path = [KJUtility kj_getKJAlbumFilePath];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyyMMddHHmmss"];
    NSString *fileName = [NSString stringWithFormat:@"%@-%@",[formatter stringFromDate:[NSDate date]], @"kj_video.mp4"];
    path = [path stringByAppendingPathComponent:fileName];
    exportSession.outputURL = [NSURL fileURLWithPath:path];
    exportSession.outputFileType = AVFileTypeMPEG4;
    __block BOOL completeOK = NO;
    WS(weakSelf)
    [exportSession exportAsynchronouslyWithCompletionHandler:^{
        switch (exportSession.status) {
            case AVAssetExportSessionStatusUnknown:
                break;
            case AVAssetExportSessionStatusWaiting:
                break;
            case AVAssetExportSessionStatusExporting:
                break;
            case AVAssetExportSessionStatusCompleted:
                completeOK = YES;
                break;
            case AVAssetExportSessionStatusFailed:
                break;
            case AVAssetExportSessionStatusCancelled:
                break;
        };
        
        if (completeOK) {
            dispatch_async(dispatch_get_main_queue(), ^{
                [KJUtility showAllTextDialog:weakSelf.view Text:@"视频截取成功"];
                if (weakSelf.kj_videoCapturedelegate && [weakSelf.kj_videoCapturedelegate respondsToSelector:@selector(kj_didCaptureCompleteForPath:)]) {
                    [KJUtility hideProgressDialog];
                    [weakSelf.kj_videoCapturedelegate kj_didCaptureCompleteForPath:path];
                } else {
                    //保存到相册
                    [KJUtility kj_saveVideoToLibraryForPath:path completeHandler:^(NSString *localIdentifier, BOOL isSuccess) {
                        if (isSuccess) {
                            NSFileManager *fileManger = [[NSFileManager alloc] init];
                            [fileManger removeItemAtPath:path error:nil];
                        }
                        dispatch_async(dispatch_get_main_queue(), ^{
                            [KJUtility hideProgressDialog];
                            [weakSelf onCancelButtonAction:nil];
                        });
                    }];
                }
            });
        } else {
            [KJUtility showAllTextDialog:weakSelf.view Text:@"视频截取失败"];
        }
        dispatch_async(dispatch_get_main_queue(), ^{
            [KJUtility hideProgressDialog];
        });
    }];
}

接下来说说利用GPUImage对本地视频加滤镜,如果需要选取滤镜后,能实时看到滤镜效果,需要用到GPUImageMovie来预览,滤镜合成还需要使用到GPUImageMovieWriter,由于GPUImageMovie预览视频时是没有声音的,所以还需要一个播放器来播放视频,这个可以看我的demo处理,下面贴出对本地视频合成滤镜的处理:

//合成滤镜
- (void)filterCompositionForFilter:(GPUImageOutput<GPUImageInput> *)filter withVideoUrl:(NSURL *)videoUrl {
    if (videoUrl) {
        WS(weakSelf)
        GPUImageOutput<GPUImageInput> *tmpFilter = filter;
        kj_movieComposition = [[GPUImageMovie alloc] initWithURL:videoUrl];
        kj_movieComposition.runBenchmark = YES;
        kj_movieComposition.playAtActualSpeed = NO;

        [kj_movieComposition addTarget:tmpFilter];
        //合成后的视频路径
        NSString *newPath = [KJUtility kj_getKJAlbumFilePath];
        newPath = [newPath stringByAppendingPathComponent:[KJUtility kj_getNewFileName]];
        unlink([newPath UTF8String]);
        NSLog(@"%f,%f",self.kj_player.currentItem.presentationSize.height,self.kj_player.currentItem.presentationSize.width);
        CGSize videoSize = self.kj_player.currentItem.presentationSize;
        NSURL *tmpUrl = [NSURL fileURLWithPath:newPath];
        [self.kj_newVideoPathArray addObject:tmpUrl];
        kj_movieWriter  = [[GPUImageMovieWriter alloc] initWithMovieURL:tmpUrl size:videoSize];
        kj_movieWriter.shouldPassthroughAudio = YES;
        //这里原GPUImage始没有这个属性的,修改后才有
        kj_movieWriter.allowWriteAudio = YES;
        kj_movieComposition.audioEncodingTarget = kj_movieWriter;
        [tmpFilter addTarget:kj_movieWriter];
        [kj_movieComposition enableSynchronizedEncodingUsingMovieWriter:kj_movieWriter];

        [kj_movieWriter startRecording];
        [kj_movieComposition startProcessing];

        __weak GPUImageMovieWriter *weakmovieWriter = kj_movieWriter;
        [kj_movieWriter setCompletionBlock:^{
            NSLog(@"滤镜添加成功");
            [tmpFilter removeTarget:weakmovieWriter];
            [weakmovieWriter finishRecording];
            dispatch_async(dispatch_get_main_queue(), ^{
                if (weakSelf.kj_selectedMusic) {
                    //合成音乐
                    [weakSelf musicCompositionForMusicInfo:weakSelf.kj_selectedMusic withVideoPath:weakSelf.kj_newVideoPathArray.lastObject];
                } else {
                    [weakSelf saveVideoToLib];
                }
            });
        }];
        [kj_movieWriter setFailureBlock:^(NSError *error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                NSLog(@"滤镜添加失败:%@", error);
                if ([[NSFileManager defaultManager] fileExistsAtPath:newPath]) {
                    NSError *delError = nil;
                    [[NSFileManager defaultManager] removeItemAtPath:newPath error:&delError];
                    if (delError) {
                        NSLog(@"删除沙盒路径失败:%@", delError);
                    }
                }
                [weakSelf.kj_newVideoPathArray removeLastObject];
                [KJUtility hideProgressDialog];
            });
        }];
    }
}

下面来说说对于本地视频添加音乐的处理,添加音乐这里我的注释写的很清楚,直接上代码(还是利用前面提到的是哪个类来处理的,原理就是把视频和音频单独提出来,最后放在工具里合并):

//合成音乐
- (void)musicCompositionForMusicInfo:(NSDictionary *)musicInfo withVideoPath:(NSURL *)videoUrl {
    if (musicInfo && videoUrl) {
        //音乐
        NSString *audioPath = [[NSBundle mainBundle] pathForResource:musicInfo[@"music"] ofType:@"mp3"];
        NSURL *audioUrl = [NSURL fileURLWithPath:audioPath];
        
        //合成后的视频输出路径
        NSString *newPath = [KJUtility kj_getKJAlbumFilePath];
        newPath = [newPath stringByAppendingPathComponent:[KJUtility kj_getNewFileName]];
        unlink([newPath UTF8String]);
        NSURL *newVideoPath = [NSURL fileURLWithPath:newPath];
        
        //合成工具
        AVMutableComposition *kj_composition = [AVMutableComposition composition];
        //音频
        AVMutableCompositionTrack *kj_audioTrack = [kj_composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
        //视频
        AVMutableCompositionTrack *kj_videoTrack = [kj_composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
        
        NSDictionary* kj_options = @{AVURLAssetPreferPreciseDurationAndTimingKey:@YES};
        //视频AVAsset
        AVURLAsset *kj_videoAsset = [[AVURLAsset alloc] initWithURL:videoUrl options:kj_options];
        //视频时间范围(合成的音乐不能超过这个时间范围)
        CMTimeRange kj_videoTimeRange = CMTimeRangeMake(kCMTimeZero, kj_videoAsset.duration);
        //采集kj_videoAsset中的视频
        NSArray *videoArray = [kj_videoAsset tracksWithMediaType:AVMediaTypeVideo];
        AVAssetTrack *kj_assetVideo = videoArray.firstObject;
        //采集的视频加入到视频通道kj_videoTrack
        NSError *kj_videoError = nil;
        BOOL isComplete_video = [kj_videoTrack insertTimeRange:kj_videoTimeRange
                                                       ofTrack:kj_assetVideo
                                                        atTime:kCMTimeZero
                                                         error:&kj_videoError];
        NSLog(@"加入视频isComplete_video:%d error:%@",isComplete_video, kj_videoError);
        //音频AVAsset
        AVURLAsset *kj_audioAsset = [[AVURLAsset alloc] initWithURL:audioUrl options:kj_options];
        //采集kj_audioAsset中的音频
        NSArray *audioArray = [kj_audioAsset tracksWithMediaType:AVMediaTypeAudio];
        AVAssetTrack *kj_assetAudio = audioArray.firstObject;
        //音频的范围
        CMTimeRange kj_audioTimeRange = CMTimeRangeMake(kCMTimeZero, kj_audioAsset.duration);
        if (CMTimeCompare(kj_audioAsset.duration, kj_videoAsset.duration)) {//当视频时间小于音频时间
            kj_audioTimeRange = CMTimeRangeMake(kCMTimeZero, kj_videoAsset.duration);
        }
        //采集的音频加入到音频通道kj_audioTrack
        NSError *kj_audioError = nil;
        BOOL isComplete_audio = [kj_audioTrack insertTimeRange:kj_audioTimeRange
                                                       ofTrack:kj_assetAudio
                                                        atTime:kCMTimeZero
                                                         error:&kj_audioError];
        NSLog(@"加入音频isComplete_audio:%d error:%@",isComplete_audio, kj_audioError);
        
        //因为要保存相册,所以设置高质量, 这里可以根据实际情况进行更改
        WS(weakSelf)
        [KJUtility kj_compressedVideoAsset:kj_composition withPresetName:AVAssetExportPresetHighestQuality withNewSavePath:newVideoPath withCompleteBlock:^(NSError *error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                if (error) {
                    NSLog(@"转码失败:%@", error);
                    [KJUtility hideProgressDialog];
                } else {
                    [weakSelf.kj_newVideoPathArray addObject:newVideoPath];
                    [weakSelf saveVideoToLib];
                }
            });
        }];
    }
}

视频压缩这个不用多说了,网上太多了,基本上是iOS自带的就有这个方法,很简单的几行代码:

/**
 视频转码/压缩

 @param asset AVAsset
 @param presetName 视频质量(建议压缩使用AVAssetExportPresetMediumQuality,存相册AVAssetExportPreset1920x1080,根据需求设置)
 @param savePath 保存的路径
 @param completeBlock 返回状态
 */
+ (void)kj_compressedVideoAsset:(AVAsset *)asset
                 withPresetName:(NSString *)presetName
                withNewSavePath:(NSURL *)savePath
              withCompleteBlock:(void(^)(NSError *error))completeBlock {
    AVAssetExportSession *kj_export = [AVAssetExportSession exportSessionWithAsset:asset
                                                                        presetName:presetName];
    kj_export.outputURL = savePath;
    kj_export.outputFileType = AVFileTypeMPEG4;
    kj_export.shouldOptimizeForNetworkUse = YES;
    [kj_export exportAsynchronouslyWithCompletionHandler:^{
        dispatch_async(dispatch_get_main_queue(), ^{
            if (kj_export.status == AVAssetExportSessionStatusCompleted) {
                if (completeBlock) {
                    completeBlock(nil);
                }
            } else if (kj_export.status == AVAssetExportSessionStatusFailed) {
                if (completeBlock) {
                    completeBlock(kj_export.error);
                }
            } else {
                NSLog(@"当前压缩进度:%f",kj_export.progress);
            }
        });
    }];
}

这里说的都是短视频的处理方案,事实上demo里有相册的处理,但是没做实时更新的处理,所以有实时更新的需要你自己添加代码监听并更新显示,当然啦,我的UI肯定不适合大家,所以这里只是提供一种方法,不是写的工具能直接拿来就能使用,demo支持iOS8*。下面给出整个demo的github:
Kegen
demo很粗糙,但是注释都有写,勿直接使用、、、GPUImage很强大,还有很多都没使用到,有需要可以研究研究,很实用。demo中视频会在相册里存两份,一份是压缩后的,一个是没压缩的,这个是我做测试的时候存的,如果大家在测试的时候不需要,这个可以在调用的时候可以去掉保存,我的调用代码:

- (IBAction)onVideoButtonAction:(UIButton *)sender {
    KJVideoAlbumController *ctrl = [[KJVideoAlbumController alloc] init];
    ctrl.kj_minTime = 2.0;
    ctrl.kj_maxTime = 15.0f;
    WS(weakSelf)
    ctrl.kj_complete = ^(NSURL *outPath) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [weakSelf editViewPath:outPath];
        });
    };
    UINavigationController *navc = [[UINavigationController alloc] initWithRootViewController:ctrl];
    navc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentViewController:navc animated:YES completion:nil];
}

- (void)editVideo:(NSString *)localIdentifier {
    WS(weakSelf)
    [KJUtility kj_getAssetForLocalIdentifier:localIdentifier completionHandler:^(PHAsset *kj_object) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [KJUtility kj_requestVideoForAsset:kj_object completion:^(AVURLAsset *asset) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    KJEditVideoViewController *ctrl = [[KJEditVideoViewController alloc] init];
                    ctrl.kj_localVideo = asset;
                    ctrl.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
                    UINavigationController *navc = [[UINavigationController alloc] initWithRootViewController:ctrl];
                    [weakSelf presentViewController:navc animated:YES completion:nil];
                });
            }];
        });
    }];
}

- (void)editViewPath:(NSURL *)path {
    KJEditVideoViewController *ctrl = [[KJEditVideoViewController alloc] init];
    ctrl.kj_localVideo = path;
    ctrl.kj_isSelectCover = YES;
    WS(weakSelf)
/**
 * videoPath压缩后的视频
 * localIdentifier保存到相册的高质量视频(如果没有添加滤镜或音乐,返回nil)
 * kj_cover 封面图
 */
    ctrl.editCompleteBlock = ^(NSURL *videoPath, NSString *localidentifier, UIImage *kj_cover) {
        [weakSelf saveVideoToLibVideoUrl:videoPath];
    };
    ctrl.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    UINavigationController *navc = [[UINavigationController alloc] initWithRootViewController:ctrl];
    [self presentViewController:navc animated:YES completion:nil];
}

//保存到相册
- (void)saveVideoToLibVideoUrl:(NSURL *)url {
    [KJUtility kj_saveVideoToLibraryForPath:url.path completeHandler:^(NSString *localIdentifier, BOOL isSuccess) {
        if (isSuccess) {
            NSLog(@"保存到相册成功");
        } else {
            NSLog(@"保存到相册失败");
        }
    }];
}

另外可能大家在看这代码里面有很多都是调用KJUtility的代码,把h文件放出来就知道了:

//
//  KJUtility.h
//  KJAlbumDemo
//
//  Created by JOIN iOS on 2017/9/5.
//  Copyright © 2017年 Kegem. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <Photos/Photos.h>
#import "UIKit+BaseExtension.h"
#import <YYWebImage.h>
#import <Masonry.h>
#import <YYAnimatedImageView.h>
#import <GPUImage/GPUImage.h>

@protocol KJCustomCameraDelegate <NSObject>

- (void)kj_didStartTakeAction;

- (void)kj_didResetTakeAction;

- (void)kj_didCompleteAction;

- (void)kj_didCancelAction;

@end

@protocol KJVideoFileDelegate <NSObject>

//这里是不保存到相册,返回录制完后的地址
- (void)kj_videoFileCompleteLocalPath:(NSString *)kj_outPath;

@end

//状态条的高
#define StatusBarHeight [[UIApplication sharedApplication] statusBarFrame].size.height
//得到屏幕bounds
#define SCREEN_SIZE [UIScreen mainScreen].bounds
//得到屏幕height
#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height
//得到屏幕width
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width
//self
#define WS(weakSelf)  __weak typeof (self) weakSelf = self;
//颜色
#define sYellowColor    0xffd700

@interface KJUtility : NSObject

+ (void)showAllTextDialog:(UIView *)view  Text:(NSString *)text;
+ (void)showProgressDialogText:(NSString *)text;
+ (void)hideProgressDialog;

//传入 秒  得到  xx分钟xx秒
+ (NSString *)getMMSSFromSS:(NSInteger)seconds;

/**
  拍摄的图片/视频等存放的路径
  
  @return 文件路径
  */
+ (NSString *)kj_getKJAlbumFilePath;

/**
 视频名
 
 @return 返回视频名
 */
+ (NSString *)kj_getNewFileName;

/**
 根据PHAsset获取图片
 
 @param asset PHAsset
 @param isSynchronous 同步-YES 异步-NO
 @param completion 返回图片
 */
+ (void)kj_requestImageForAsset:(PHAsset *)asset
             withSynchronous:(BOOL)isSynchronous
                  completion:(void (^)(UIImage *image))completion;

/**
 根据PHAsset获取视频
 
 @param kj_asset PHAsset
 @param completion AVURLAsset
 */
+ (void)kj_requestVideoForAsset:(PHAsset *)kj_asset
                  completion:(void (^)(AVURLAsset *asset))completion;

/**
 获取视频的缩略图方法

 @param urlAsset 视频的本地路径
 @param start 开始时间
 @param timescale scale
 @return 视频截图
 */
+ (UIImage *)kj_getScreenShotImageFromVideoPath:(AVURLAsset *)urlAsset
                                   withStart:(CGFloat)start
                               withTimescale:(CGFloat)timescale ;

/**
 图片保存到系统相册
 
 @param image 图片
 @param completionHandler 返回结果
 */
+ (void)kj_savePhotoToLibraryForImage:(UIImage *)image
                   completeHandler:(void(^)(NSString *localIdentifier, BOOL isSuccess))completionHandler;

/**
 视频保存到系统相册
 
 @param path 视频路径
 @param completionHandler 返回结果
 */
+ (void)kj_saveVideoToLibraryForPath:(NSString *)path
                  completeHandler:(void(^)(NSString *localIdentifier, BOOL isSuccess))completionHandler;

/**
 根据相册localid获取PHAsset
 
 @param localIdentifier 相册id
 @param completionHandler 返回PHAsset对象
 */
+ (void)kj_getAssetForLocalIdentifier:(NSString *)localIdentifier
                 completionHandler:(void(^)(PHAsset *kj_object))completionHandler;

/**
 视频转码/压缩
 
 @param asset AVAsset
 @param presetName 视频质量(建议压缩上传使用AVAssetExportPresetMediumQuality根据需求设置)
 @param savePath 保存的路径
 @param completeBlock 返回状态
 */
+ (void)kj_compressedVideoAsset:(AVAsset *)asset
                 withPresetName:(NSString *)presetName
                withNewSavePath:(NSURL *)savePath
              withCompleteBlock:(void(^)(NSError *error))completeBlock;

/**
 相册授权
 
 @param ctrl 当前控制器
 @param completeBlock 返回是否允许访问
 */
+ (void)kj_photoLibraryAuthorizationStatus:(UIViewController *)ctrl
                             completeBlock:(void (^)(BOOL allowAccess))completeBlock;

/**
 相机授权
 
 @param ctrl 当前控制器
 @param completeBlock 返回是否允许访问
 */
+ (void)kj_cameraAuthorizationStatus:(UIViewController *)ctrl
                       completeBlock:(void (^)(BOOL allowAccess))completeBlock;

/**
 麦克风授权
 
 @param ctrl 当前控制器
 @param completeBlock 返回是否允许访问
 */
+ (void)kj_requestRecordPermission:(UIViewController *)ctrl
                     completeBlock:(void (^)(BOOL allowAccess))completeBlock;

/**
 授权提示弹出框(跳转到手机设置-应用权限)
 
 @param ctrl 当前控制器
 @param title 提示语
 */
+ (void)kj_authorizationAlert:(UIViewController *)ctrl
                   tipMessage:(NSString *)title;

/**
 图片加滤镜
 
 @param image 源图
 @param filterName 滤镜名字
 @return 合成滤镜后的图片
 */
+ (UIImage *)kj_imageProcessedUsingGPUImage:(UIImage *)image
                             withFilterName:(NSString *)filterName;

@end

这里本意是在使用完短视频的功能后,删除沙盒中的kjalbum的文件夹。好了,不在过多的赘述了,大家直接下载demo看看就知道了,下面给出效果展示gif,由于太大,压缩处理了,可能有点模糊:

KJlbum.gif
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