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iOS中如何給視頻添加背景音樂同時(shí)保留原音-創(chuàng)新互聯(lián)
這篇文章給大家分享的是有關(guān)iOS中如何給視頻添加背景音樂同時(shí)保留原音的內(nèi)容。小編覺得挺實(shí)用的，因此分享給大家做個參考，一起跟隨小編過來看看吧。
代碼：
//抽取原視頻的音頻與需要的音樂混合
-(void)addmusic:(id)sender
{
[MBProgressHUDshowHUDAddedTo:self.viewanimated:YES];
AVMutableComposition *composition =[AVMutableCompositioncomposition];
audioMixParams =[[NSMutableArrayalloc]initWithObjects:nil];
//錄制的視頻
NSURL *video_inputFileUrl =[NSURLfileURLWithPath:self.videoPath];
AVURLAsset *songAsset =[AVURLAssetURLAssetWithURL:video_inputFileUrloptions:nil];
CMTime startTime =CMTimeMakeWithSeconds(0,songAsset.duration.timescale);
CMTime trackDuration =songAsset.duration;
//獲取視頻中的音頻素材
[selfsetUpAndAddAudioAtPath:video_inputFileUrltoComposition:compositionstart:startTimedura:trackDurationoffset:CMTimeMake(14*44100,44100)];
//本地要插入的音樂
NSString *bundleDirectory =[[NSBundlemainBundle]bundlePath];
NSString *path = [bundleDirectorystringByAppendingPathComponent:@"30secs.mp3"];
NSURL *assetURL2 =[NSURLfileURLWithPath:path];
//獲取設(shè)置完的本地音樂素材
[selfsetUpAndAddAudioAtPath:assetURL2toComposition:compositionstart:startTimedura:trackDurationoffset:CMTimeMake(0,44100)];
//創(chuàng)建一個可變的音頻混合
AVMutableAudioMix *audioMix =[AVMutableAudioMixaudioMix];
audioMix.inputParameters =[NSArrayarrayWithArray:audioMixParams];//從數(shù)組里取出處理后的音頻軌道參數(shù)
//創(chuàng)建一個輸出
AVAssetExportSession *exporter =[[AVAssetExportSessionalloc]
initWithAsset:composition
presetName:AVAssetExportPresetAppleM4A];
exporter.audioMix = audioMix;
exporter.outputFileType=@"com.apple.m4a-audio";
NSString* fileName =[NSStringstringWithFormat:@"%@.mov",@"overMix"];
//輸出路徑
NSString *exportFile =[NSStringstringWithFormat:@"%@/%@",[selfgetLibarayPath], fileName];
if([[NSFileManagerdefaultManager]fileExistsAtPath:exportFile]) {
[[NSFileManagerdefaultManager]removeItemAtPath:exportFileerror:nil];
}
NSLog(@"是否在主線程1%d",[NSThreadisMainThread]);
NSLog(@"輸出路徑===%@",exportFile);
NSURL *exportURL =[NSURLfileURLWithPath:exportFile];
exporter.outputURL = exportURL;
self.mixURL =exportURL;
[exporterexportAsynchronouslyWithCompletionHandler:^{
int exportStatus =(int)exporter.status;
switch (exportStatus){
caseAVAssetExportSessionStatusFailed:{
NSError *exportError =exporter.error;
NSLog(@"錯誤，信息: %@", exportError);
[MBProgressHUDhideHUDForView:self.viewanimated:YES];
break;
}
caseAVAssetExportSessionStatusCompleted:{
NSLog(@"是否在主線程2%d",[NSThreadisMainThread]);
NSLog(@"成功");
//最終混合
[selftheVideoWithMixMusic];
break;
}
}
}];
}
//最終音頻和視頻混合
-(void)theVideoWithMixMusic
{
NSError *error =nil;
NSFileManager *fileMgr =[NSFileManagerdefaultManager];
NSString *documentsDirectory =[NSHomeDirectory()
stringByAppendingPathComponent:@"Documents"];
NSString *videoOutputPath =[documentsDirectorystringByAppendingPathComponent:@"test_output.mp4"];
if ([fileMgrremoveItemAtPath:videoOutputPatherror:&error]!=YES) {
NSLog(@"無法刪除文件，錯誤信息：%@",[error localizedDescription]);
}
//聲音來源路徑（最終混合的音頻）
NSURL *audio_inputFileUrl =self.mixURL;
//視頻來源路徑
NSURL *video_inputFileUrl = [NSURLfileURLWithPath:self.videoPath];
//最終合成輸出路徑
NSString *outputFilePath =[documentsDirectorystringByAppendingPathComponent:@"final_video.mp4"];
NSURL *outputFileUrl = [NSURLfileURLWithPath:outputFilePath];
if([[NSFileManagerdefaultManager]fileExistsAtPath:outputFilePath])
[[NSFileManagerdefaultManager]removeItemAtPath:outputFilePatherror:nil];
CMTime nextClipStartTime =kCMTimeZero;
//創(chuàng)建可變的音頻視頻組合
AVMutableComposition* mixComposition =[AVMutableCompositioncomposition];
//視頻采集
AVURLAsset* videoAsset =[[AVURLAssetalloc]initWithURL:video_inputFileUrloptions:nil];
CMTimeRange video_timeRange =CMTimeRangeMake(kCMTimeZero,videoAsset.duration);
AVMutableCompositionTrack*a_compositionVideoTrack = [mixCompositionaddMutableTrackWithMediaType:AVMediaTypeVideopreferredTrackID:kCMPersistentTrackID_Invalid];
[a_compositionVideoTrackinsertTimeRange:video_timeRangeofTrack:[[videoAssettracksWithMediaType:AVMediaTypeVideo]objectAtIndex:0]atTime:nextClipStartTimeerror:nil];
//聲音采集
AVURLAsset* audioAsset =[[AVURLAssetalloc]initWithURL:audio_inputFileUrloptions:nil];
CMTimeRange audio_timeRange =CMTimeRangeMake(kCMTimeZero,videoAsset.duration);//聲音長度截取范圍==視頻長度
AVMutableCompositionTrack*b_compositionAudioTrack = [mixCompositionaddMutableTrackWithMediaType:AVMediaTypeAudiopreferredTrackID:kCMPersistentTrackID_Invalid];
[b_compositionAudioTrackinsertTimeRange:audio_timeRangeofTrack:[[audioAssettracksWithMediaType:AVMediaTypeAudio]objectAtIndex:0]atTime:nextClipStartTimeerror:nil];
//創(chuàng)建一個輸出
AVAssetExportSession* _assetExport =[[AVAssetExportSessionalloc]initWithAsset:mixCompositionpresetName:AVAssetExportPresetMediumQuality];
_assetExport.outputFileType =AVFileTypeQuickTimeMovie;
_assetExport.outputURL =outputFileUrl;
_assetExport.shouldOptimizeForNetworkUse=YES;
self.theEndVideoURL=outputFileUrl;
[_assetExportexportAsynchronouslyWithCompletionHandler:
^(void ) {
[MBProgressHUDhideHUDForView:self.viewanimated:YES];
//播放
NSURL*url = [NSURLfileURLWithPath:outputFilePath];
MPMoviePlayerViewController *theMovie =[[MPMoviePlayerViewControlleralloc]initWithContentURL:url];
[selfpresentMoviePlayerViewControllerAnimated:theMovie];
theMovie.moviePlayer.movieSourceType=MPMovieSourceTypeFile;
[theMovie.moviePlayerplay];
}
];
NSLog(@"完成！輸出路徑==%@",outputFilePath);
}
//通過文件路徑建立和添加音頻素材
- (void)setUpAndAddAudioAtPath:(NSURL*)assetURLtoComposition:(AVMutableComposition*)composition start:(CMTime)startdura:(CMTime)duraoffset:(CMTime)offset{
AVURLAsset *songAsset =[AVURLAssetURLAssetWithURL:assetURLoptions:nil];
AVMutableCompositionTrack *track =[compositionaddMutableTrackWithMediaType:AVMediaTypeAudiopreferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *sourceAudioTrack =[[songAssettracksWithMediaType:AVMediaTypeAudio]objectAtIndex:0];
NSError *error =nil;
BOOL ok =NO;
CMTime startTime = start;
CMTime trackDuration = dura;
CMTimeRange tRange =CMTimeRangeMake(startTime,trackDuration);
//設(shè)置音量
//AVMutableAudioMixInputParameters（輸入?yún)?shù)可變的音頻混合）
//audioMixInputParametersWithTrack（音頻混音輸入?yún)?shù)與軌道）
AVMutableAudioMixInputParameters *trackMix =[AVMutableAudioMixInputParametersaudioMixInputParametersWithTrack:track];
[trackMixsetVolume:0.8fatTime:startTime];
//素材加入數(shù)組
[audioMixParamsaddObject:trackMix];
//Insert audio into track //offsetCMTimeMake(0, 44100)
ok = [trackinsertTimeRange:tRangeofTrack:sourceAudioTrackatTime:kCMTimeInvaliderror:&error];
}
#pragma mark - 保存路徑
-(NSString*)getLibarayPath
{
NSFileManager *fileManager =[NSFileManagerdefaultManager];
NSArray* paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString* path = [pathsobjectAtIndex:0];
NSString *movDirectory = [pathstringByAppendingPathComponent:@"tmpMovMix"];
[fileManagercreateDirectoryAtPath:movDirectorywithIntermediateDirectories:YESattributes:nilerror:nil];
return movDirectory;
}感謝各位的閱讀！關(guān)于“iOS中如何給視頻添加背景音樂同時(shí)保留原音”這篇文章就分享到這里了，希望以上內(nèi)容可以對大家有一定的幫助，讓大家可以學(xué)到更多知識，如果覺得文章不錯，可以把它分享出去讓更多的人看到吧！
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新聞名稱：iOS中如何給視頻添加背景音樂同時(shí)保留原音-創(chuàng)新互聯(lián)
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