Audio problems when filtering movie file
Wed, 07/04/2012 - 20:26
I'm using the following code to filter "Movie.m4v" in my app's documents folder, to "MovieFiltered.m4v" in the same folder. The problem is, when i enable audio with:
self.movieWriter.shouldPassthroughAudio = YES; movieFile.audioEncodingTarget = self.movieWriter; [movieFile enableSynchronizedEncodingUsingMovieWriter:self.movieWriter];
the app crashes, with EXC BAD ACCESS on:
runOnMainQueueWithoutDeadlocking(^{
[self processMovieFrame:sampleBufferRef];
});If I don't enable audio, the movie is filtered fine, so the error is something to do with audio. Any pointers would be really appreciated!
Full Code:
-(void)filterMovie
{
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *pathString = [documentsDirectory stringByAppendingPathComponent:@"Movie.m4v"];
NSURL *pathUrl = [NSURL fileURLWithPath:pathString];
GPUImageMovie *movieFile = [[GPUImageMovie alloc] initWithURL:pathUrl];
movieFile.runBenchmark = YES;
[movieFile addTarget:self.previewFilter];
[self.previewFilter removeAllTargets];
NSString* filteredFile= [documentsDirectory stringByAppendingPathComponent:@"MovieFiltered.m4v"];
unlink([filteredFile UTF8String]);
NSURL *movieURL = [NSURL fileURLWithPath:filteredFile];
self.movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(480.0, 640.0)];
[self.previewFilter addTarget:self.movieWriter];
self.movieWriter.shouldPassthroughAudio = YES;
movieFile.audioEncodingTarget = self.movieWriter;
[movieFile enableSynchronizedEncodingUsingMovieWriter:self.movieWriter];
[self.movieWriter startRecording];
[movieFile startProcessing];
[self.movieWriter setCompletionBlock:^{
NSLog(@"Recording done");
[self.movieWriter finishRecording];
}];
}
Fixed it right after posting this.
For anybody else having this problem: movieFile is getting deallocated prematurely, and that caused the error. Setting movieFile as a retained property fixed the issue.