為了效果好可以將IamgeView的背景色調為黑色

然后在ViewController中添加以下代碼

#import "ViewController.h"

import <AVFoundation/AVFoundation.h>
import "MBProgressHUD+MJ.h"
@interface ViewController ()
/* 用于播放 /
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@end
@implementation ViewController

(void)viewDidLoad {
  [super viewDidLoad];

}

(IBAction)mergeAction:(UIButton *)sender {
  [self merge];
}
// 混合音樂
(void)merge{
  // mbp提示框
  [MBProgressHUD showMessage:@"正在處理中"];
  // 路徑
  NSString documents = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
  // 聲音來源
  NSURL audioInputUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"五環之歌" ofType:@"mp3"]];
  // 視頻來源
  NSURL *videoInputUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"myPlayer" ofType:@"mp4"]];
// 最終合成輸出路徑
  NSString outPutFilePath = [documents stringByAppendingPathComponent:@"merge.mp4"];
  // 添加合成路徑
  NSURL outputFileUrl = [NSURL fileURLWithPath:outPutFilePath];
  // 時間起點
  CMTime nextClistartTime = kCMTimeZero;
  // 創建可變的音視頻組合
  AVMutableComposition *comosition = [AVMutableComposition composition];



// 視頻采集
AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:videoInputUrl options:nil];
// 視頻時間范圍
CMTimeRange videoTimeRange = CMTimeRangeMake(kCMTimeZero, videoAsset.duration);
// 視頻通道 枚舉 kCMPersistentTrackID_Invalid = 0
AVMutableCompositionTrack *videoTrack = [comosition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
// 視頻采集通道
AVAssetTrack *videoAssetTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] firstObject];
//  把采集軌道數據加入到可變軌道之中
[videoTrack insertTimeRange:videoTimeRange ofTrack:videoAssetTrack atTime:nextClistartTime error:nil];



// 聲音采集
AVURLAsset *audioAsset = [[AVURLAsset alloc] initWithURL:audioInputUrl options:nil];
// 因為視頻短這里就直接用視頻長度了,如果自動化需要自己寫判斷
CMTimeRange audioTimeRange = videoTimeRange;
// 音頻通道
AVMutableCompositionTrack *audioTrack = [comosition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
// 音頻采集通道
AVAssetTrack *audioAssetTrack = [[audioAsset tracksWithMediaType:AVMediaTypeAudio] firstObject];
// 加入合成軌道之中
[audioTrack insertTimeRange:audioTimeRange ofTrack:audioAssetTrack atTime:nextClistartTime error:nil];

// 創建一個輸出
AVAssetExportSession *assetExport = [[AVAssetExportSession alloc] initWithAsset:comosition presetName:AVAssetExportPresetMediumQuality];
// 輸出類型
assetExport.outputFileType = AVFileTypeQuickTimeMovie;
// 輸出地址
assetExport.outputURL = outputFileUrl;
// 優化
assetExport.shouldOptimizeForNetworkUse = YES;
// 合成完畢
[assetExport exportAsynchronouslyWithCompletionHandler:^{
    // 回到主線程
    dispatch_async(dispatch_get_main_queue(), ^{
        // 調用播放方法
        [self playWithUrl:outputFileUrl];
    });
}];

}
/* 播放方法 /

(void)playWithUrl:(NSURL )url{
  // 傳入地址
  AVPlayerItem playerItem = [AVPlayerItem playerItemWithURL:url];
  // 播放器
  AVPlayer player = [AVPlayer playerWithPlayerItem:playerItem];
  // 播放器layer
  AVPlayerLayer playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
  playerLayer.frame = self.imageView.frame;
  // 視頻填充模式
  playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
  // 添加到imageview的layer上
  [self.imageView.layer addSublayer:playerLayer];
  // 隱藏提示框 開始播放
  [MBProgressHUD hideHUD];
  [MBProgressHUD showSuccess:@"合成完成"];
  // 播放
  [player play];
}</pre> 
MBP是一個第三方提示類,如果不關心這個功能可以刪除這三行代碼和頭文件
 
// mbp提示框
  [MBProgressHUD showMessage:@"正在處理中"];
// 隱藏提示框 開始播放
  [MBProgressHUD hideHUD];
  [MBProgressHUD showSuccess:@"合成完成"];
 
效果圖
 
因為是gif..請自己yy出Uber視頻配上五環之歌(我感覺還挺配的)
 

  
 
 
 

  這里寫圖片描述 
 
 
</div> 
GitHub:https://github.com/Lafree317/MergeVideoAndMusic 
 
 
本人還是一只小菜雞,不過是一只熱心腸的菜雞,如果有需要幫助或者代碼中有更好的建議的話可以發郵件到lafree317@163.com中,我們一起進步XD
 
來自： http://www.jianshu.com/p/9f83af9dbbef