Unable to edit video using GPUImage

Question

I have created video using AVFoundation and now I want to edit it via GPUImage framework.
I have set all the setting as per mention here. After seeing his example of "SimpleVideoFileFilter" I have just copied his code and replace my Assets URL for Video. Here is the code.

movieFile = [[GPUImageMovie alloc] initWithURL:player.contentURL];
pixellateFilter = [[GPUImagePixellateFilter alloc] init];

[movieFile addTarget:pixellateFilter];

NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Movie.m4v"];
unlink([pathToMovie UTF8String]);
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];

movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(480.0, 640.0)];
[pixellateFilter addTarget:movieWriter];

movieWriter.shouldPassthroughAudio = YES;
movieFile.audioEncodingTarget = movieWriter;
[movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter];

[movieWriter startRecording];
[movieFile startProcessing];

NSLog(@"precess started");
[movieWriter setCompletionBlock:^{
    [pixellateFilter removeTarget:movieWriter];
    [movieWriter finishRecording];
    dispatch_async(dispatch_get_main_queue(), ^{
        NSLog(@"completed");
    });
}];

But I'm getting following error.



Please help me to solve this issue.

Answer 1

By reading this I knew that this error occur when video has no audio.
Same issue I have. I have no Audio my asset(Video). So facing this error.

To solve this error I just replaced from

movieFile.audioEncodingTarget = movieWriter;

to

movieFile.audioEncodingTarget = nil;

and code works fine.