我正在尝试使用以下方法将音频文件与视频文件合并:
+ (void)CompileFilesToMakeMovie:(NSString *) audioPath {
NSLog(@"a");
AVMutableComposition* mixComposition = [AVMutableComposition composition];
NSURL *audio_inputFileUrl = [[NSURL alloc] initFileURLWithPath:audioPath];
NSString *videoPath = [[NSBundle bundleForClass:[self class]] pathForResource:@"input" ofType:@"mov"];
NSURL* video_inputFileUrl = [NSURL fileURLWithPath:videoPath];
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *outputFilePath = [docsDir stringByAppendingPathComponent:@"OutputFile.mov"];
NSURL* outputFileUrl = [NSURL fileURLWithPath:outputFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
NSLog(@"b");
CMTime nextClipStartTime = kCMTimeZero;
AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:video_inputFileUrl options:nil];
CMTimeRange video_timeRange = CMTimeRangeMake(kCMTimeZero,videoAsset.duration);
AVMutableCompositionTrack *a_compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[a_compositionVideoTrack insertTimeRange:video_timeRange ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:nextClipStartTime error:nil];
NSLog(@"c");
AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audio_inputFileUrl options:nil];
CMTimeRange audio_timeRange = CMTimeRangeMake(kCMTimeZero, audioAsset.duration);
AVMutableCompositionTrack *b_compositionAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[b_compositionAudioTrack insertTimeRange:audio_timeRange ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:nextClipStartTime error:nil];
NSLog(@"d");
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
_assetExport.outputFileType = @"com.apple.quicktime-movie";
_assetExport.outputURL = outputFileUrl;
[_assetExport exportAsynchronouslyWithCompletionHandler:
^(void ) {
UISaveVideoAtPathToSavedPhotosAlbum(outputFilePath, nil, nil, nil);
}
];
}
但在为“NSRangeException”记录“c”后我收到错误,原因:
* -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'.
音频文件位于
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"%1.iaff"];
有什么建议吗? 谢谢。
最佳答案
首先我得说你给的音频格式不对,
NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"%1.iaff"];
使 aiff NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"1.aiff"];
如果您不确定您使用的代码, 这段代码对我有用,
-(void) mergeAudio:(NSURL *) audioURL withVideo:(NSURL *) videoURL andSaveToPathUrl:(NSString *) savePath{
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, audioAsset.duration)
ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetPassthrough];
NSURL *savetUrl = [NSURL fileURLWithPath:savePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:savePath])
{
[[NSFileManager defaultManager] removeItemAtPath:savePath error:nil];
}
_assetExport.outputFileType = @"com.apple.quicktime-movie";
_assetExport.outputURL = savetUrl;
_assetExport.shouldOptimizeForNetworkUse = YES;
[_assetExport exportAsynchronouslyWithCompletionHandler:
^(void ) {
NSLog(@"fileSaved !");
}
];
}
传递最终文件的videoURL、audioURL和保存路径
关于iphone - 合并音频与视频 Objective-C,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13909400/