所以我一直在尝试使用AVAssetExportSession
来修剪方形视频。但是由于某些原因,我总是得到这个错误:
Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo=0x1a03be70 {NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x1a04c5e0 "The operation couldn’t be completed. (OSStatus error -12769.)", NSLocalizedFailureReason=An unknown error occurred (-12769)}
从苹果的网站我发现-11800
是一个未知的错误,但OSStatus error -12769
呢?我在互联网上到处搜索,我没有看到任何与这个错误代码相关的问题。请帮助。谢谢!
我的代码:
AVAsset *asset = [[AVURLAsset alloc]initWithURL:self.originalVidUrl options:nil];
AVAssetTrack *clipVideoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
if (clipVideoTrack.naturalSize.width==clipVideoTrack.naturalSize.height) {
NSLog(@"Square video");
NSArray *presets = [AVAssetExportSession exportPresetsCompatibleWithAsset:asset];
if ([presets containsObject:AVAssetExportPresetHighestQuality]) {
self.exportSession = [[AVAssetExportSession alloc]initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];
self.exportSession.outputURL = [NSURL fileURLWithPath: self.tmpVidPath];
self.exportSession.outputFileType = AVFileTypeMPEG4;
CMTime start = ...
CMTime duration = ...
CMTimeRange range = CMTimeRangeMake(start, duration);
self.exportSession.timeRange = range;
[self.exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([self.exportSession status]) {
case AVAssetExportSessionStatusFailed:
NSLog(@"%@",self.exportSession.error);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
default:
NSLog(@"Export Success, File Saved.");
break;
}
}];
}
}
注:此代码适用于使用本机相机应用程序拍摄的视频(即非正方形/未经处理的视频)。
我想我找到了解决方案,但我不知道为什么或如何工作。
只需将预设名称从AVAssetExportPresetHighestQuality
更改为AVAssetExportPreset1280x720
,就可以了!