ios - OSStatus 错误 -12769？

Question

所以我一直在尝试使用AVAssetExportSession修剪方形视频。但由于某种原因，我不断收到此错误:

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 Apple 的网站我发现 -11800是一个未知错误，但是 OSStatus error -12769 呢？ ?我在互联网上到处搜索，我没有看到任何与此错误代码相关的问题/问题。请帮忙。谢谢!

我的代码在这里:

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;
            }
        }];
    }
}

附言此代码适用于使用 native 相机应用程序拍摄的视频(即非方形/未处理的视频)。

Answer 1

我想我找到了解决方案，但我不知道它为什么或如何工作。

只需将预设名称从 AVAssetExportPresetHighestQuality 更改至AVAssetExportPreset1280x720 ，你很高兴!