我从UIImagepickercontroller的[info objectForKey:UIImagePickerControllerMediaURL]的方法中获取inputurl didFinishPickingMediaWithInfo。
NSURL *inputURL = [NSURL URLWithString:inputurlstring];
我从这段代码给outputurl
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *videoPath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,@"capturedvideo.MOV"];
NSURL *outputURL = [NSURL fileURLWithPath:videoPath];
我使用以下代码来获取低质量的视频
- (void)convertVideoToLowQuailtyWithInputURL:(NSURL*)inputURL
outputURL:(NSURL*)outputURL
handler:(void (^)(AVAssetExportSession*))handler
{
[[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:inputURL options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetLowQuality];
exportSession.outputURL = outputURL;
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
if (exportSession.status == AVAssetExportSessionStatusCompleted)
{
printf("completed\n");
}
else
{
printf("error\n");
NSLog(@"error is %@",exportSession.error);
}
}];
}
仅使用大文件时出现以下错误。因为当我使用小尺寸的视频文件时，没有出现任何错误。
Error Domain=NSURLErrorDomain Code=-1 "unknown error" UserInfo=0x616d890
{NSErrorFailingURLStringKey=/private/var/mobile/Applications/EE1E6701-EED0-4830-BD1D-7366680713C0/tmp//trim.7mL7VS.MOV, NSErrorFailingURLKey=/private/var/mobile/Applications/EE1E6701-EED0-4830-BD1D-7366680713C0/tmp//trim.7mL7VS.MOV, NSLocalizedDescription=unknown error, NSUnderlyingError=0x2d1460 "The operation couldn’t be completed. (OSStatus error -12935.)", NSURL=/private/var/mobile/Applications/EE1E6701-EED0-4830-BD1D-7366680713C0/tmp//trim.7mL7VS.MOV}
最佳答案
上面的代码是完美的作品。唯一的变化是inputURL。
在将inputURL更改为fileURLWithPath之后:
NSURL *inputURL = [NSURL fileURLWithPath:inputurlstring];
现在，它完美地工作了。
关于iphone - UIImagepickercontroller : converting to low quality video error，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/14872953/