Question

我成功地将录像和录音带合在一起,将其出口到新的m4v文档中。

My problem is now, that I want to mix the same video file and 2 audio files, which are two AVAssetTrack and have the same time lines, together. Like you do it in an audio editor where you can make a mixdown of two or more sound files, and you get one merged file.

这是可能的吗? 如果是,我怎么办?

此时,我刚刚听到一个声音,而不是两个声音。

顺便说一句:我的目标是“简便”在录像中增加一个声音文件,该录像已经具备了音响,并与新的音响文档相混合。但看来,AVAssetTrack只是允许录音或录像,因此,我在原始录像中做了新的录音记录。也许这是错误的......

事先感谢你!

Answer 1

如果不看到你的法典,我们就很难帮助你。或许这一法典有助于:

    AVMutableComposition* composition = [AVMutableComposition composition];

    AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:videoURL options:nil];
    AVURLAsset* audioAsset1 = [[AVURLAsset alloc]initWithURL:audioURL1 options:nil];
    AVURLAsset* audioAsset2 = [[AVURLAsset alloc]initWithURL:audioURL1 options:nil];

    AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];

        NSError* error = NULL;

        [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero,videoAsset.duration) 
                                       ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo]objectAtIndex:0] 
                                        atTime:kCMTimeZero  
 AVMutableCompositionTrack *compositionAudioTrack1 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];

        [compositionAudioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero,audioAsset1.duration) 
                                       ofTrack:[[audioAsset1 tracksWithMediaType:AVMediaTypeAudio]objectAtIndex:0] 
                                        atTime:kCMTimeZero
                                         error:&error];

 AVMutableCompositionTrack *compositionAudioTrack2 = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];

        [compositionAudioTrack2 insertTimeRange:CMTimeRangeMake(kCMTimeZero,audioAsset2.duration) 
                                       ofTrack:[[audioAsset2 tracksWithMediaType:AVMediaTypeAudio]objectAtIndex:0] 
                                        atTime:kCMTimeZero
                                         error:&error];

现在,这一组成只是与AVExportSession公司出口。不要忘记释放这些资产。

友情链接