如何使用AVMutableCompositionTrack合并audio和video
在我的应用程序中，我需要合并audio和video，然后我需要在Mediaplayer中播放audio文件。 我如何合并IOS中的audio和video。 有没有任何源代码。 请给我一些build议
提前致谢
用这个
AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audioUrl options:nil]; AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:videoUrl options:nil]; AVMutableComposition* mixComposition = [AVMutableComposition composition]; AVMutableCompositionTrack *compositionCommentaryTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [compositionCommentaryTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration) ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil]; AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration) ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil]; AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality]; NSString* videoName = @"export.mov"; NSString *exportPath = [NSTemporaryDirectory() stringByAppendingPathComponent:videoName]; NSURL *exportUrl = [NSURL fileURLWithPath:exportPath]; if ([[NSFileManager defaultManager] fileExistsAtPath:exportPath]) { [[NSFileManager defaultManager] removeItemAtPath:exportPath error:nil]; } _assetExport.outputFileType = @"com.apple.quicktime-movie"; _assetExport.outputURL = exportUrl; _assetExport.shouldOptimizeForNetworkUse = YES; [_assetExport exportAsynchronouslyWithCompletionHandler: ^(void ) { // your completion code here } } ]; 您可以通过创build可变组合来合并video。
AVMutableComposition* composition = [[AVMutableComposition alloc]init]; AVURLAsset* video1 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:path1]options:nil]; NSArray *pathComponents = [NSArray arrayWithObjects: [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],@"MyAudio.m4a",nil]; NSURL *outputFileURL = [NSURL fileURLWithPathComponents:pathComponents]; AVAsset *audioAsset = [AVAsset assetWithURL:outputFileURL]; //Create mutable composition of audio type AVMutableCompositionTrack *audioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero,video1.duration) ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil]; AVMutableCompositionTrack* composedTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; [composedTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video1.duration) ofTrack:[[video1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil]; AVAssetExportSession*exporter = [[AVAssetExportSession alloc]initWithAsset:composition presetName:AVAssetExportPresetHighestQuality]; [exporter exportAsynchronouslyWithCompletionHandler:^{ case AVAssetExportSessionStatusFailed: NSLog(@"Failed to export video"); break; case AVAssetExportSessionStatusCancelled: NSLog(@"export cancelled"); break; }
对于video合并访问本教程。 http://iosbucket.blogspot.in/2015/04/mp4-conversion-and-video-merging-in-ios.html
您还可以find用于合并video的示例项目。