Sunset Lake Software - Comments for "Load a movie > Filtering > Save to Camera Roll"

Thank you, Brad!

Your problem is that you're

Your problem is that you're trying to save the movie to the library right after it starts recording, rather than when the movie is done. You need to place the movie saving code within the completion block.

Thanks, Brad. I'm using the

Thanks, Brad. I'm using the following code, but it still not working:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
	[picker dismissModalViewControllerAnimated:YES];
        NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
 
    if ([mediaType isEqualToString:@"public.movie"]){
        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
 
        movieFile = [[GPUImageMovie alloc] initWithURL:videoURL];
        movieFile.runBenchmark = YES;
        filter = [[GPUImageColorInvertFilter alloc] init];
        [movieFile addTarget:filter];
 
        NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Movie.m4v"];
        unlink([pathToMovie UTF8String]);
        NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];
 
        movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(640.0, 480.0)];
        [filter addTarget:movieWriter];
 
        movieWriter.shouldPassthroughAudio = YES;
        movieFile.audioEncodingTarget = movieWriter;
        [movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter];
 
        [movieWriter startRecording];
        [movieFile startProcessing];
 
        [movieWriter setCompletionBlock:^{
            [filter removeTarget:movieWriter];
            [movieWriter finishRecording];
        }];
 
        if ( UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(pathToMovie))  //without it not working too
        {
            UISaveVideoAtPathToSavedPhotosAlbum(pathToMovie, nil, NULL, NULL);
            NSLog(@"Saving");
        }
 
    }
}

Once the movie has been

Once the movie has been recorded to disk, you can use code like the following to copy it into the user's media library:

UISaveVideoAtPathToSavedPhotosAlbum(pathToMovie, nil, NULL, NULL);

Thank you, Brad, great

Thank you, Brad, great example! But I still have a question.
What can I use for saving a movie to camera roll: movieWriter or something else?

Look at the

Look at the SimpleVideoFileFilter, it shows how to do the filtering to another file. From there, it's easy to write that movie into the user's media library.