Ios：从video中删除audio

我有要求静音video发送最终用户，所以我需要从video中删除audio文件。 将video传递给单个进程进行静音。

Answer 1

// Remove audio from video - (void) RemoveAudioFromVideo:(NSString *)VideoLocalPath { NSString * initPath1 = VideoLocalPath; AVMutableComposition *composition = [AVMutableComposition composition]; NSString *inputVideoPath = initPath1; AVURLAsset * sourceAsset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:inputVideoPath] options:nil]; AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; BOOL ok = NO; AVAssetTrack * sourceVideoTrack = [[sourceAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]; CMTimeRange x = CMTimeRangeMake(kCMTimeZero, [sourceAsset duration]); ok = [compositionVideoTrack insertTimeRange:x ofTrack:sourceVideoTrack atTime:kCMTimeZero error:nil]; if([[NSFileManager defaultManager] fileExistsAtPath:initPath1]) { [[NSFileManager defaultManager] removeItemAtPath:initPath1 error:nil]; } NSURL *url = [[NSURL alloc] initFileURLWithPath: initPath1]; AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:composition presetName:AVAssetExportPresetHighestQuality]; exporter.outputURL=url; NSLog(@";%@", [exporter supportedFileTypes]); exporter.outputFileType = @"com.apple.quicktime-movie"; [exporter exportAsynchronouslyWithCompletionHandler:^{ [self savefinalVideoFileToDocuments:exporter.outputURL]; }]; } // Write final Video -(void)savefinalVideoFileToDocuments:(NSURL *)url { NSString *storePath = [[self applicationCacheDirectory] stringByAppendingPathComponent:@"Videos"]; NSData * movieData = [NSData dataWithContentsOfURL:url]; [movieData writeToFile:storePath atomically:YES]; } // Directory Path - (NSString *)applicationCacheDirectory { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = ([paths count] > 0) ? [paths objectAtIndex:0] : nil; return documentsDirectory; } 

Answer 2

在Swift 3中，

 func removeAudioFromVideo(_ videoPath: String) { let initPath1: String = videoPath let composition = AVMutableComposition() let inputVideoPath: String = initPath1 let sourceAsset = AVURLAsset(url: URL(fileURLWithPath: inputVideoPath), options: nil) let compositionVideoTrack: AVMutableCompositionTrack? = composition.addMutableTrack(withMediaType: AVMediaTypeVideo, preferredTrackID: kCMPersistentTrackID_Invalid) let sourceVideoTrack: AVAssetTrack? = sourceAsset.tracks(withMediaType: AVMediaTypeVideo)[0] let x: CMTimeRange = CMTimeRangeMake(kCMTimeZero, sourceAsset.duration) _ = try? compositionVideoTrack!.insertTimeRange(x, of: sourceVideoTrack!, at: kCMTimeZero) if FileManager.default.fileExists(atPath: initPath1) { try? FileManager.default.removeItem(atPath: initPath1) } let url = URL(fileURLWithPath: initPath1) let exporter = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetHighestQuality) exporter?.outputURL = url exporter?.outputFileType = "com.apple.quicktime-movie" exporter?.exportAsynchronously(completionHandler: {() -> Void in self.saveFinalVideoFile(toDocuments: exporter!.outputURL!) }) } func saveFinalVideoFile(toDocuments url: URL) { let fileURL = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).appendingPathComponent("Videos") let movieData = try? Data(contentsOf: url) try? movieData?.write(to: fileURL, options: .atomic) }