How to overcome from the error " The requested URL was not found on this server "in AVfoundation - iphone

Question

I am working on video app.I have to capture and trim the video.I had done this using AVFoundation framework.When I am calling trim method I am getting error " The requested URL was not found on this server".
I used the following code to trim and play the video
- (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");
}
}
Every time its going into " AVAssetExportSessionStatusFailed:" case and showing above error.
I am not getting where I had gone wrong.Please suggest me what to do now.

Answer 1

you problem here is, you are first deleting the file and trying to use it with export session. You should not delete the file while export is in progress, and I recommend you to save exported file to temporary directory, after export is done, just delete your old file and move the exported one to the original file URL. Good Luck!