我正在开发视频应用程序。我必须捕获和修剪视频。我已经使用 AVFoundation 框架完成了这项工作。当我调用修剪方法时，我收到错误“在此服务器上找不到请求的 URL”。
我使用以下代码修剪和播放视频
- (IBAction)showTrimmedVideo:(UIButton *)sender
{
[self deleteTmpFile];
NSURL *videoFileUrl = [NSURL fileURLWithPath:originalVideoPath];
NSLog(@"Video to trim is %@",videoFileUrl);
AVAsset *anAsset = [[AVURLAsset alloc] initWithURL:videoFileUrl options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:anAsset];
if ([compatiblePresets containsObject:AVAssetExportPresetMediumQuality])
{
self.exportSession = [[AVAssetExportSession alloc]
initWithAsset:anAsset presetName:AVAssetExportPresetPassthrough];
// Implementation continues.
NSURL *furl = [NSURL fileURLWithPath:originalVideoPath];
NSLog(@"Original file path is %@",furl);
self.exportSession.outputURL = furl;
self.exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTime start = CMTimeMakeWithSeconds(self.startTime, anAsset.duration.timescale);
CMTime duration = CMTimeMakeWithSeconds(self.stopTime-self.startTime, anAsset.duration.timescale);
CMTimeRange range = CMTimeRangeMake(start, duration);
self.exportSession.timeRange = range;
self.trimBtn.hidden = YES;
self.myActivityIndicator.hidden = NO;
[self.myActivityIndicator startAnimating];
[self.exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([self.exportSession status])
{
case AVAssetExportSessionStatusFailed:
NSLog(@"Export failed: %@", [[self.exportSession error] localizedDescription]);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
default:
NSLog(@"NONE");
dispatch_async(dispatch_get_main_queue(), ^{
[self.myActivityIndicator stopAnimating];
self.myActivityIndicator.hidden = YES;
self.trimBtn.hidden = NO;
[self playMovie:self.tmpVideoPath];
});
break;
}
}];
}
}
-(void)deleteTmpFile
{
NSURL *url = [NSURL fileURLWithPath:originalVideoPath];
NSFileManager *fm = [NSFileManager defaultManager];
BOOL exist = [fm fileExistsAtPath:url.path];
NSError *err;
if (exist) {
[fm removeItemAtURL:url error:&err];
NSLog(@"file deleted");
if (err)
{
NSLog(@"file remove error, %@", err.localizedDescription );
}
} else {
NSLog(@"no file by that name");
}
}
每次进入“ AVAssetExportSessionStatusFailed：”案例并显示上述错误。我没有找到我出错的地方。请建议我现在该怎么做。