IOS-合并两个音频并将其作为mp3格式
这里我有两个音频文件,我成功地组合了这两个音频文件,但它只返回一个.m4a格式,我需要mp3格式IOS-合并两个音频并将其作为mp3格式,ios,objective-c,avmutablecomposition,Ios,Objective C,Avmutablecomposition,这里我有两个音频文件,我成功地组合了这两个音频文件,但它只返回一个.m4a格式,我需要mp3格式 - (BOOL) combineVoices1 { NSError *error = nil; BOOL ok = NO; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsD
- (BOOL) combineVoices1
{
NSError *error = nil;
BOOL ok = NO;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
CMTime nextClipStartTime = kCMTimeZero;
//Create AVMutableComposition Object.This object will hold our multiple AVMutableCompositionTrack.
AVMutableComposition *composition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack setPreferredVolume:0.8];
NSString *soundOne =[[NSBundle mainBundle]pathForResource:@"test1" ofType:@"caf"];
NSURL *url = [NSURL fileURLWithPath:soundOne];
AVAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
NSArray *tracks = [avAsset tracksWithMediaType:AVMediaTypeAudio];
AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset.duration) ofTrack:clipAudioTrack atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *compositionAudioTrack1 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack setPreferredVolume:0.3];
NSString *soundOne1 =[[NSBundle mainBundle]pathForResource:@"test" ofType:@"caf"];
NSURL *url1 = [NSURL fileURLWithPath:soundOne1];
AVAsset *avAsset1 = [AVURLAsset URLAssetWithURL:url1 options:nil];
NSArray *tracks1 = [avAsset1 tracksWithMediaType:AVMediaTypeAudio];
AVAssetTrack *clipAudioTrack1 = [[avAsset1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset.duration) ofTrack:clipAudioTrack1 atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *compositionAudioTrack2 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack2 setPreferredVolume:1.0];
NSString *soundOne2 =[[NSBundle mainBundle]pathForResource:@"song" ofType:@"caf"];
NSURL *url2 = [NSURL fileURLWithPath:soundOne2];
AVAsset *avAsset2 = [AVURLAsset URLAssetWithURL:url2 options:nil];
NSArray *tracks2 = [avAsset2 tracksWithMediaType:AVMediaTypeAudio];
AVAssetTrack *clipAudioTrack2 = [[avAsset2 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, avAsset2.duration) ofTrack:clipAudioTrack2 atTime:kCMTimeZero error:nil];
AVAssetExportSession *exportSession = [AVAssetExportSession
exportSessionWithAsset:composition
presetName:AVAssetExportPresetAppleM4A];
if (nil == exportSession) return NO;
NSString *soundOneNew = [documentsDirectory stringByAppendingPathComponent:@"combined10.m4a"];
//NSLog(@"Output file path - %@",soundOneNew);
// configure export session output with all our parameters
exportSession.outputURL = [NSURL fileURLWithPath:soundOneNew]; // output path
exportSession.outputFileType = AVFileTypeAppleM4A; // output file type
// perform the export
[exportSession exportAsynchronouslyWithCompletionHandler:^{
if (AVAssetExportSessionStatusCompleted == exportSession.status) {
NSLog(@"AVAssetExportSessionStatusCompleted");
} else if (AVAssetExportSessionStatusFailed == exportSession.status) {
// a failure may happen because of an event out of your control
// for example, an interruption like a phone call comming in
// make sure and handle this case appropriately
NSLog(@"AVAssetExportSessionStatusFailed");
} else {
NSLog(@"Export Session Status: %d", exportSession.status);
}
}];
return YES;
}
有谁能帮我一下吗你在尝试转换成mp3时遇到了很多麻烦。涉及到昂贵的专利许可证。你会发现很多人都在寻找解决方案,但都没有好的回答 如果你想自己做点什么,你可以试试FFMpeg,但这里有一些非常严肃的法律免责声明: 这一行尤其令人担忧: Q:将整个FFmpeg核心合并到 我自己的商业产品 A:您可能在这里遇到了问题。那里 一些公司在其产品中使用FFmpeg。 这些公司发现一旦你开始赚钱 从专利技术来看,专利权人将紧随其后 他们的执照费。值得注意的是,MPEG LA对 收集与MPEG相关的技术
您好,我没有您的答案,但我想知道您如何在iOS sdk中合并两个音频文件?你有任何样本代码或项目,然后请提供我的链接或代码。事实上,我正在寻找这种类型的例子。