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mov
static 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;
}