短视频app源码开发,音视频合成的实现
目录
短视频app源码开发，音视频合成的实现
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在短视频app源码开发中，音视频数据的处理是关键，尤其是音视频合成处理，只有有声音的短视频内容才更有吸引力，在短视频app源码中如何实现音视频的合成呢？
音频合成
调用方法
//音视频合成
func audioMerge() {
// 声音来源1
let audioInputPath1 = NSBundle.mainBundle().pathForResource("五环之歌", ofType: "mp3")!
// 音频来源2
let audioInputPath2 = NSBundle.mainBundle().pathForResource("爱的人", ofType: "mp3")!
let ext = ExtAudioFileMixer()
ext.audioInputPath1 = audioInputPath1;
ext.audioInputPath2 = audioInputPath2;
ext.process {url in
self.playWithUrl(url)
}
}实现
AVMutableComposition *composition =[AVMutableComposition composition];
audioMixParams =[[NSMutableArray alloc]init];
//本地音乐1
NSURL *audioInputUrl1 =[NSURL fileURLWithPath:self.audioInputPath1];
AVURLAsset *audioAsset =[AVURLAsset URLAssetWithURL:audioInputUrl1 options:nil];
CMTime startTime =CMTimeMakeWithSeconds(0,audioAsset.duration.timescale);
CMTime trackDuration =audioAsset.duration;
//获取本地音乐1素材
[self setUpAndAddAudioAtPath:audioInputUrl1 toComposition:composition start:startTime dura:trackDuration offset:CMTimeMake(0,44100)];
//本地音乐2
NSURL *audioInputUrl2 = [NSURL fileURLWithPath:self.audioInputPath2];
//获取本地音乐2素材
[self setUpAndAddAudioAtPath:audioInputUrl2 toComposition:composition start:startTime dura:trackDuration offset:CMTimeMake(0,44100)];
//创建一个可变的音频混合
AVMutableAudioMix *audioMix =[AVMutableAudioMix audioMix];
audioMix.inputParameters =[NSArray arrayWithArray:audioMixParams];//从数组里取出处理后的音频轨道参数
//创建一个输出
AVAssetExportSession *exporter =[[AVAssetExportSession alloc]
initWithAsset:composition
presetName:AVAssetExportPresetAppleM4A];
exporter.audioMix = audioMix;
exporter.outputFileType = AVFileTypeAppleM4A;
NSString* fileName =[NSString stringWithFormat:@"%@.m4a",@"overMix"];
//输出路径
NSString *exportFile =[NSString stringWithFormat:@"%@/%@",[self getLibarayPath], fileName];
self.audioOutputPath = exportFile;
if([[NSFileManager defaultManager]fileExistsAtPath:self.audioOutputPath]) {
[[NSFileManager defaultManager]removeItemAtPath:self.audioOutputPath error:nil];
}
NSLog(@"输出路径===%@",self.audioOutputPath);
NSURL *exportURL =[NSURL fileURLWithPath:self.audioOutputPath];
exporter.outputURL = exportURL;
[exporter exportAsynchronouslyWithCompletionHandler:^{
int exportStatus =(int)exporter.status;
switch (exportStatus){
case AVAssetExportSessionStatusFailed:{
NSError *exportError = exporter.error;
NSLog(@"错误，信息: %@", exportError);
break;
}
case AVAssetExportSessionStatusCompleted:{
unsigned long long size = [[NSFileManager defaultManager] attributesOfItemAtPath:exportFile error:nil].fileSize;
NSLog(@"是否在主线程2%d,,%llu",[NSThread isMainThread],size/1024);
finished(exportURL);
break;
}
}
}];以上就是在短视频app源码开发中，音视频合并完成的全部内容了。