动态判断合成视频,保留原音,混音音乐,设置音量大小
来源：互联网 发布：淘宝行业关键词 编辑：程序博客网 时间：2024/06/05 03:55
项目里有一个需求,就是动态判断图片合成的mov与自己自拍的视频合成,然后还要保留自拍的原音,最后再混音一个音乐,并设置音量大小下面是代码,可以模拟器测试,但测试的时候最后不要开断点
加入framework
//// ViewController.h// img+mov+audio+video//// Created by 王颜龙 on 14-1-14.// Copyright (c) 2014年 longyan. All rights reserved.//#import <UIKit/UIKit.h>#import "CompositionCenter.h"@interface ViewController : UIViewController<CompositionDelegate>- (IBAction)start:(UIButton *)sender;- (IBAction)soundMixing:(UIButton *)sender;- (IBAction)overMix:(id)sender;@end
#import "CompositionCenter.h"#import "ViewController.h"#import "MovItem.h"@interface ViewController ()@property(nonatomic,strong)NSMutableArray *dataArr;@end@implementation ViewController- (void)viewDidLoad{ [super viewDidLoad]; NSString *fileStr = [[NSBundle mainBundle]pathForResource:@"IMG_0598" ofType:@"MOV"]; NSURL *fileUrl = [NSURL fileURLWithPath:fileStr]; NSString *fileStr2 = [[NSBundle mainBundle]pathForResource:@"IMG_0634" ofType:@"MOV"]; NSURL *fileUrl2 = [NSURL fileURLWithPath:fileStr2]; self.dataArr = [[NSMutableArray alloc]initWithCapacity:0]; for (int i = 0; i < 30; i++) { MovItem *item = [[MovItem alloc]init]; item.type = @"img"; item.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",arc4random()%10+1]]; [self.dataArr addObject:item]; } MovItem *item = [[MovItem alloc]init]; item.type = @"mov"; item.fileUrl = fileUrl; [self.dataArr addObject:item]; for (int i = 0; i < 30; i++) { MovItem *item = [[MovItem alloc]init]; item.type = @"img"; item.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",arc4random()%10+1]]; [self.dataArr addObject:item]; } MovItem *item2 = [[MovItem alloc]init]; item2.type = @"mov"; item2.fileUrl = fileUrl2; [self.dataArr addObject:item2]; for (int i = 0; i < 30; i++) { MovItem *item = [[MovItem alloc]init]; item.type = @"img"; item.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",arc4random()%10+1]]; [self.dataArr addObject:item]; } }- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}- (IBAction)start:(UIButton *)sender { [[CompositionCenter sharedDataCenter]startComposition:self.dataArr]; [[CompositionCenter sharedDataCenter] setDeleagte:self]; }- (IBAction)soundMixing:(UIButton *)sender { //不能开断点测试 [[CompositionCenter sharedDataCenter] soundMixing]; }- (IBAction)overMix:(id)sender { //最后的混音 [[CompositionCenter sharedDataCenter]overMix];}- (void)CompositionDidBegin{ NSLog(@"begin");}- (void)CompositionDidFinish:(NSURL *)url{ NSLog(@"Finish");}- (void)CompositionDidFail{ NSLog(@"Fail");}@end//// DataCenter.h// img+mov+audio+video//// Created by 王颜龙 on 14-1-14.// Copyright (c) 2014年 longyan. All rights reserved.//#import <Foundation/Foundation.h>@protocol CompositionDelegate <NSObject>- (void)CompositionDidBegin;- (void)CompositionDidFinish:(NSURL *)url;- (void)CompositionDidFail;@end@interface CompositionCenter : NSObject{ CGRect imageRect; dispatch_queue_t _serialQueue; NSMutableArray *audioMixParams;}@property(nonatomic,strong)NSMutableArray *trackArr;@property(nonatomic, strong)NSString* videoPath;@property (nonatomic,strong)NSURL *url;@property(nonatomic, strong)AVAssetWriter* videoWriter;@property(nonatomic, strong)AVAssetWriterInput* writerInput;@property(nonatomic, strong)AVAssetWriterInputPixelBufferAdaptor* adaptor;@property(nonatomic, assign)BOOL firstImgAdded;@property(nonatomic,unsafe_unretained)id<CompositionDelegate> deleagte;@property(nonatomic,assign)CMTime allTime;@property(nonatomic,strong)NSMutableArray *tmpArr;@property(nonatomic,strong)NSMutableArray *tmpDetailArr;@property(nonatomic,strong)NSURL *overUrl;@property(nonatomic,strong)NSURL *mixURL;+ (CompositionCenter*) sharedDataCenter;- (void)startComposition:(NSMutableArray *)arr;- (void)soundMixing;- (void)overMix;@end//// DataCenter.m// img+mov+audio+video//// Created by 王颜龙 on 14-1-14.// Copyright (c) 2014年 longyan. All rights reserved.//#import "ExtAudioFileMixer.h"#import "MovItem.h"#import "CompositionCenter.h"#import "MovDetailItem.h"static CompositionCenter *sharedObj = nil; //第一步：静态实例，并初始化。@implementation CompositionCenter+ (CompositionCenter*) sharedDataCenter //第二步：实例构造检查静态实例是否为nil{ @synchronized (self) { if (sharedObj == nil) { //如果为nil，创建实例 sharedObj = [[[self class] alloc]init]; } } return sharedObj;}#pragma mark - 下面这些方法，是为了确保只有一个实例对象+(id)allocWithZone:(NSZone *)zone{ if (sharedObj == nil) { sharedObj = [super allocWithZone:zone]; } return sharedObj;}//实现copy协议，返回本身- (id)copyWithZone:(NSZone *)zone{ return sharedObj;}#pragma mark - 动态保存movstatic int numCount = 0;- (void)startComposition:(NSMutableArray *)arr{ NSLog(@"保存路径===%@",[self getLibarayPath]); if (self.deleagte && [self.deleagte respondsToSelector:@selector(CompositionDidBegin)]) { [self.deleagte CompositionDidBegin]; } self.allTime = kCMTimeZero; //存放png的数组 self.tmpArr = [[NSMutableArray alloc]initWithCapacity:0]; //存放合成mov的item数组 self.tmpDetailArr = [[NSMutableArray alloc]initWithCapacity:0]; //存放track的数组 self.trackArr = [[NSMutableArray alloc]initWithCapacity:0]; //创建串行队列 _serialQueue = dispatch_queue_create("serialQueue", DISPATCH_QUEUE_SERIAL); __block int num = 0; //使用串行队列控制合成顺序 for (MovItem *item in arr) { dispatch_async(_serialQueue, ^{ if ([item.type isEqualToString:@"img"]) { [self.tmpArr addObject:item]; NSLog(@"jiarushuzu %d",num); if (num+1 == arr.count) { NSLog(@"over %d",num); [self initRecord]; [self startCamera]; [self.tmpArr removeAllObjects]; } }else{ NSLog(@"mov save %d",num); [self initRecord]; [self startCamera]; [self saveMOV:item]; [self.tmpArr removeAllObjects]; } num++; }); } numCount = 0; //合成方法 [self Composition];}- (void)Composition{ dispatch_async(_serialQueue, ^{ //整合 AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init]; AVMutableVideoCompositionInstruction * MainInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction]; CMTime tmpTime; for (MovDetailItem *item in self.tmpDetailArr) { NSLog(@"item === %d",item.num); //动态创建track AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; if ( item.num == 1 ) { tmpTime = kCMTimeZero; } NSLog(@"tmpTime === %f",CMTimeGetSeconds(tmpTime)); [firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, item.asset.duration) ofTrack:[[item.asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:tmpTime error:nil]; //AUDIO TRACK //如果是mov进行合成保留原声 if([item.type isEqualToString:@"mov"]){ AVMutableCompositionTrack *AudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [AudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, item.asset.duration) ofTrack:[[item.asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:tmpTime error:nil]; } //FIXING ORIENTATION// //调整视频方向 AVMutableVideoCompositionLayerInstruction *FirstlayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:firstTrack]; AVAssetTrack *FirstAssetTrack = [[item.asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]; UIImageOrientation FirstAssetOrientation_ = UIImageOrientationUp; BOOL isFirstAssetPortrait_ = NO; CGAffineTransform firstTransform = FirstAssetTrack.preferredTransform; if(firstTransform.a == 0 && firstTransform.b == 1.0 && firstTransform.c == -1.0 && firstTransform.d == 0) {FirstAssetOrientation_= UIImageOrientationRight; isFirstAssetPortrait_ = YES;} if(firstTransform.a == 0 && firstTransform.b == -1.0 && firstTransform.c == 1.0 && firstTransform.d == 0) {FirstAssetOrientation_ = UIImageOrientationLeft; isFirstAssetPortrait_ = YES;} if(firstTransform.a == 1.0 && firstTransform.b == 0 && firstTransform.c == 0 && firstTransform.d == 1.0) {FirstAssetOrientation_ = UIImageOrientationUp;} if(firstTransform.a == -1.0 && firstTransform.b == 0 && firstTransform.c == 0 && firstTransform.d == -1.0) {FirstAssetOrientation_ = UIImageOrientationDown;} CGFloat FirstAssetScaleToFitRatio = 320/FirstAssetTrack.naturalSize.width; if(isFirstAssetPortrait_){ FirstAssetScaleToFitRatio = 320/FirstAssetTrack.naturalSize.height; CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio); [FirstlayerInstruction setTransform:CGAffineTransformConcat(FirstAssetTrack.preferredTransform, FirstAssetScaleFactor) atTime:tmpTime]; }else{ CGAffineTransform FirstAssetScaleFactor = CGAffineTransformMakeScale(FirstAssetScaleToFitRatio,FirstAssetScaleToFitRatio); [FirstlayerInstruction setTransform:CGAffineTransformConcat(CGAffineTransformConcat(FirstAssetTrack.preferredTransform, FirstAssetScaleFactor),CGAffineTransformMakeTranslation(0, 150)) atTime:tmpTime]; } tmpTime = [self addAllAVAssetDuration:item]; [FirstlayerInstruction setOpacity:0.0 atTime:self.allTime]; [self.trackArr insertObject:FirstlayerInstruction atIndex:0]; } MainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero,self.allTime); MainInstruction.layerInstructions = self.trackArr; AVMutableVideoComposition *MainCompositionInst = [AVMutableVideoComposition videoComposition]; MainCompositionInst.instructions = [NSArray arrayWithObject:MainInstruction]; MainCompositionInst.frameDuration = CMTimeMake(1, 30); if (iPhone5) { MainCompositionInst.renderSize = CGSizeMake(320.0, 568.0); }else{ MainCompositionInst.renderSize = CGSizeMake(320.0, 480.0);//解决图像问题 } NSString* fileName = [NSString stringWithFormat:@"%@.mov", @"over"]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", [self getLibarayPath], fileName]; NSLog(@"输出路径 === %@",filePath); NSURL *url = [NSURL fileURLWithPath:filePath]; //输出 AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality]; exporter.outputURL=url; exporter.outputFileType = AVFileTypeQuickTimeMovie; exporter.videoComposition = MainCompositionInst; exporter.shouldOptimizeForNetworkUse = YES; [exporter exportAsynchronouslyWithCompletionHandler:^ { dispatch_async(dispatch_get_main_queue(), ^{ [self exportDidFinish:exporter]; }); }]; });}- (void)exportDidFinish:(AVAssetExportSession*)session{ if(session.status == AVAssetExportSessionStatusCompleted){ NSLog(@"!!!"); self.overUrl = session.outputURL; if (self.deleagte && [self.deleagte respondsToSelector:@selector(CompositionDidFinish:)]) { [self.deleagte CompositionDidFinish:self.overUrl]; } }else if (session.status == AVAssetExportSessionStatusFailed){ if (self.deleagte && [self.deleagte respondsToSelector:@selector(CompositionDidFail)]) { [self.deleagte CompositionDidFail]; } }}#pragma mark - 视频保存本地- (void)saveMOV:(MovItem *)item{ numCount ++; NSString* fileName = [NSString stringWithFormat:@"%d.mov", numCount]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", [self getLibarayPath], fileName]; NSData *data = [NSData dataWithContentsOfURL:item.fileUrl]; [data writeToFile:filePath atomically:YES]; //创建合成mov的item MovDetailItem *item0 = [[MovDetailItem alloc]init]; AVAsset *asset = [AVAsset assetWithURL:item.fileUrl]; item0.asset = asset; item0.num = numCount; item0.type = @"mov"; [self.tmpDetailArr addObject:item0];}#pragma mark - 初始化写入- (void)initRecord{ numCount ++; //是否是第一次添加图片 self.firstImgAdded = FALSE; //video路径 NSString* fileName = [NSString stringWithFormat:@"%d.mov", numCount]; self.videoPath = [NSString stringWithFormat:@"%@/%@", [self getLibarayPath], fileName];// NSLog(@"输出== %@",self.videoPath); //设置图片 CGSize frameSize = imageRect.size; NSError* error = nil; //创建写入对象 self.videoWriter = [[AVAssetWriter alloc] initWithURL:[NSURL fileURLWithPath:self.videoPath] fileType:AVFileTypeQuickTimeMovie error:&error]; //如果出错,打印错误内容 if(error) { NSLog(@"error creating AssetWriter: %@",[error description]); self.videoWriter = nil; return; } //设置参数 NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys: AVVideoCodecH264, AVVideoCodecKey, [NSNumber numberWithInt:frameSize.width], AVVideoWidthKey, [NSNumber numberWithInt:frameSize.height], AVVideoHeightKey, nil]; //输入对象 self.writerInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings]; //属性设置 NSMutableDictionary *attributes = [[NSMutableDictionary alloc] init]; [attributes setObject:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32ARGB] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey]; [attributes setObject:[NSNumber numberWithUnsignedInt:frameSize.width] forKey:(NSString*)kCVPixelBufferWidthKey]; [attributes setObject:[NSNumber numberWithUnsignedInt:frameSize.height] forKey:(NSString*)kCVPixelBufferHeightKey]; //通过属性和writerInput 创建一个新的Adaptor self.adaptor = [AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput:self.writerInput sourcePixelBufferAttributes:attributes]; //添加输入,必须在开始写入之前 [self.videoWriter addInput:self.writerInput]; self.writerInput.expectsMediaDataInRealTime = YES; //开始写入 [self.videoWriter startWriting]; [self.videoWriter startSessionAtSourceTime:kCMTimeZero];}#pragma mark - 开始写入- (void)startCamera{ int count = 0; while (self.tmpArr.count - count) { MovItem *item = [self.tmpArr objectAtIndex:count]; UIImage *image = item.image; CGImageRef image1 = image.CGImage; [self writeImage:image1 withIndex:count]; count ++; } [self.writerInput markAsFinished]; [self.videoWriter finishWriting]; MovDetailItem *item = [[MovDetailItem alloc]init]; AVAsset *asset = [AVAsset assetWithURL:[NSURL fileURLWithPath:self.videoPath]]; item.asset = asset; item.num = numCount; item.type = @"img"; [self.tmpDetailArr addObject:item];}- (void)writeImage:(CGImageRef)img withIndex:(NSInteger)curCount{ CVPixelBufferRef buffer = NULL; if (self.videoWriter == nil) { NSLog(@"error~~~~~~~~~~~"); } if (self.firstImgAdded == FALSE) { buffer = [self pixelBufferFromCGImage:img]; BOOL result = [self.adaptor appendPixelBuffer:buffer withPresentationTime:kCMTimeZero]; if (result == NO) //failes on 3GS, but works on iphone 4 { NSLog(@"failed to append buffer"); } if(buffer) { CVBufferRelease(buffer); } self.firstImgAdded = TRUE; } else { if (self.adaptor.assetWriterInput.readyForMoreMediaData) { CMTime frameTime = CMTimeMake(1, FramePerSec); CMTime lastTime = CMTimeMake(curCount, FramePerSec); CMTime presentTime = CMTimeAdd(lastTime, frameTime); buffer = [self pixelBufferFromCGImage:img]; BOOL result = [self.adaptor appendPixelBuffer:buffer withPresentationTime:presentTime]; if (result == NO) //failes on 3GS, but works on iphone 4 { NSLog(@"failed to append buffer"); NSLog(@"The error is %@", [self.videoWriter error]); } else { NSLog(@"write ok"); } if(buffer) { CVBufferRelease(buffer); } } else { NSLog(@"error"); } } }- (CVPixelBufferRef)pixelBufferFromCGImage:(CGImageRef)image{ NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:TRUE], kCVPixelBufferCGImageCompatibilityKey, [NSNumber numberWithBool:TRUE],kCVPixelBufferCGBitmapContextCompatibilityKey, nil];//是否兼容 CVPixelBufferRef pxbuffer = NULL; CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, imageRect.size.width, imageRect.size.height, kCVPixelFormatType_32ARGB, (__bridge CFDictionaryRef) options, &pxbuffer);//返回kCVReturnSuccess kCFAllocatorDefault = nil status=status; NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);//判断类型 CVPixelBufferLockBaseAddress(pxbuffer, 0);//访问地址 void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer); NSParameterAssert(pxdata != NULL); CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(pxdata, imageRect.size.width, imageRect.size.height, 8, 4*imageRect.size.width, rgbColorSpace, kCGImageAlphaNoneSkipFirst); NSParameterAssert(context); CGContextConcatCTM(context, CGAffineTransformMakeRotation(0)); CGContextDrawImage(context, CGRectMake(0, 0, imageRect.size.width, imageRect.size.height), image); CGColorSpaceRelease(rgbColorSpace); CGContextRelease(context); CVPixelBufferUnlockBaseAddress(pxbuffer, 0); return pxbuffer;}#pragma mark - 混音 取出mov的音频和选择的音乐混音- (void)soundMixing{ if (self.deleagte && [self.deleagte respondsToSelector:@selector(CompositionDidBegin)]) { [self.deleagte CompositionDidBegin]; } AVMutableComposition *composition = [AVMutableComposition composition]; audioMixParams = [[NSMutableArray alloc] initWithObjects:nil]; AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:self.overUrl options:nil]; CMTime startTime = CMTimeMakeWithSeconds(0, 1); CMTime trackDuration = songAsset.duration; [self setUpAndAddAudioAtPath:self.overUrl toComposition:composition start:startTime dura:trackDuration offset:CMTimeMake(14*44100, 44100)]; NSString * path = [[NSBundle mainBundle] pathForResource:@"最炫民族风" ofType:@"mp3"]; NSURL *assetURL2 = [NSURL fileURLWithPath:path]; [self setUpAndAddAudioAtPath:assetURL2 toComposition:composition start:startTime dura:trackDuration offset:CMTimeMake(0, 44100)]; AVMutableAudioMix *audioMix = [AVMutableAudioMix audioMix]; audioMix.inputParameters = [NSArray arrayWithArray:audioMixParams]; //If you need to query what formats you can export to, here's a way to find out NSLog (@"compatible presets for songAsset: %@", [AVAssetExportSession exportPresetsCompatibleWithAsset:composition]); AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset: composition presetName: AVAssetExportPresetAppleM4A]; exporter.audioMix = audioMix; exporter.outputFileType = @"com.apple.m4a-audio"; NSString* fileName = [NSString stringWithFormat:@"%@.mov", @"overMix"]; NSString *exportFile = [NSString stringWithFormat:@"%@/%@", [self getLibarayPath], fileName]; // set up export if ([[NSFileManager defaultManager] fileExistsAtPath:exportFile]) { [[NSFileManager defaultManager] removeItemAtPath:exportFile error:nil]; } NSLog(@"是否在主线程1 %d",[NSThread isMainThread]); NSLog(@"输出路径===%@",exportFile); NSURL *exportURL = [NSURL fileURLWithPath:exportFile]; exporter.outputURL = exportURL; self.mixURL = exportURL; // do the export [exporter exportAsynchronouslyWithCompletionHandler:^{ int exportStatus = exporter.status; switch (exportStatus) { case AVAssetExportSessionStatusFailed:{ NSError *exportError = exporter.error; NSLog (@"AVAssetExportSessionStatusFailed: %@", exportError); break; } case AVAssetExportSessionStatusCompleted: { NSLog(@"是否在主线程2 %d",[NSThread isMainThread]); NSLog (@"AVAssetExportSessionStatusCompleted"); break; } case AVAssetExportSessionStatusUnknown: NSLog (@"AVAssetExportSessionStatusUnknown"); break; case AVAssetExportSessionStatusExporting: NSLog (@"AVAssetExportSessionStatusExporting"); break; case AVAssetExportSessionStatusCancelled: NSLog (@"AVAssetExportSessionStatusCancelled"); break; case AVAssetExportSessionStatusWaiting: NSLog (@"AVAssetExportSessionStatusWaiting"); break; default: NSLog (@"didn't get export status"); break; } }];}static int numMix = 0;- (void) setUpAndAddAudioAtPath:(NSURL*)assetURL toComposition:(AVMutableComposition *)composition start:(CMTime)start dura:(CMTime)dura offset:(CMTime)offset{ AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil]; AVMutableCompositionTrack *track = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; AVAssetTrack *sourceAudioTrack = [[songAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]; NSError *error = nil; BOOL ok = NO; CMTime startTime = start; CMTime trackDuration = dura; CMTimeRange tRange = CMTimeRangeMake(startTime, trackDuration); //Set Volume AVMutableAudioMixInputParameters *trackMix = [AVMutableAudioMixInputParameters audioMixInputParametersWithTrack:track]; if (numMix == 0) { NSLog(@"音量0.9"); [trackMix setVolume:1.0f atTime:startTime]; }else{ NSLog(@"音量0.2"); [trackMix setVolume:0.05f atTime:startTime]; } numMix++; [audioMixParams addObject:trackMix]; //Insert audio into track //offset CMTimeMake(0, 44100) ok = [track insertTimeRange:tRange ofTrack:sourceAudioTrack atTime:kCMTimeInvalid error:&error];}#pragma mark - 保存路径- (NSString*)getLibarayPath{ NSFileManager *fileManager = [NSFileManager defaultManager]; NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);NSString* path = [paths objectAtIndex:0]; NSString *movDirectory = [path stringByAppendingPathComponent:@"tmpMovMix"]; [fileManager createDirectoryAtPath:movDirectory withIntermediateDirectories:YES attributes:nil error:nil]; return movDirectory;}#pragma mark - 最后合成总的mov- (void)overMix{ [self.trackArr removeAllObjects]; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ //整合 AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init]; AVMutableVideoCompositionInstruction * MainInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction]; AVAsset *item = [AVAsset assetWithURL:self.overUrl]; AVAsset *sound = [AVAsset assetWithURL:self.mixURL]; AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; [firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, item.duration) ofTrack:[[item tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil]; AVMutableCompositionTrack *AudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [AudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, item.duration) ofTrack:[[sound tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil]; //FIXING ORIENTATION// AVMutableVideoCompositionLayerInstruction *FirstlayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:firstTrack]; [FirstlayerInstruction setOpacity:0.0 atTime:item.duration]; [self.trackArr insertObject:FirstlayerInstruction atIndex:0]; MainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero,item.duration); MainInstruction.layerInstructions = self.trackArr; AVMutableVideoComposition *MainCompositionInst = [AVMutableVideoComposition videoComposition]; MainCompositionInst.instructions = [NSArray arrayWithObject:MainInstruction]; MainCompositionInst.frameDuration = CMTimeMake(1, 30); if (iPhone5) { MainCompositionInst.renderSize = CGSizeMake(320.0, 568.0); }else{ MainCompositionInst.renderSize = CGSizeMake(320.0, 480.0);//解决图像问题 } NSString* fileName = [NSString stringWithFormat:@"%@.mov", @"over+mix-over2"]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", [self getLibarayPath], fileName]; NSLog(@"输出路径 === %@",filePath); NSURL *url = [NSURL fileURLWithPath:filePath]; AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality]; exporter.outputURL=url; exporter.outputFileType = AVFileTypeQuickTimeMovie;// exporter.videoComposition = MainCompositionInst; exporter.shouldOptimizeForNetworkUse = YES; [exporter exportAsynchronouslyWithCompletionHandler:^ { dispatch_async(dispatch_get_main_queue(), ^{ [self exportDidFinish:exporter]; }); }]; });}#pragma mark - 根据asset累加得到duration- (CMTime)addAllAVAssetDuration:(MovDetailItem *)item{ if (item.num == 1) { self.allTime = CMTimeAdd(kCMTimeZero, item.asset.duration); }else{ self.allTime = CMTimeAdd(self.allTime, item.asset.duration); } return self.allTime;} 1 1
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