GPUImageMovieWriter pauses capture and startWriting can crash

[crayfellow]

We are setting up a recording of filtered capture like this:

    recorder = [[GPUImageMovieWriter alloc]
          initWithMovieURL:tempVideoURL
          size:dimensions
          fileType:(NSString *)kUTTypeMPEG4
          outputSettings:videoCompressionSettings];
    [recorder setHasAudioTrack:YES];

    [camera setAudioEncodingTarget:recorder];
    [outputFilter addTarget:recorder];
    [recorder startRecording];

While this starts recording, and when recording is finished, it introduces a noticeable freeze delay into the capture being previewed in a GPUImageView (another outputFilter target).

When recording is completed we'd like to be able to do subsequent recordings, but it appears GPUImageMovieWriter needs to be completely rebuilt every time in order to prevent it from trying to reuse AVAssetWriters (the crash would be "Cannot call method when status is 2").

However, when the recorder is cleared out on completion of recording like this:

        [outputFilter removeTarget:recorder];
        [camera setAudioEncodingTarget:nil];
        recorder = nil;

Subsequent recordings simply crash with "Cannot call method when status is 3", indicating the AVAssetWriter has failed.

So two questions:

• Is there a way to avoid the frozen capture upon start and stop recording?
• Is it possible to reuse GPUImageMovieWriter instances?

Thanks!

[hexuallyactive]

"While this starts recording, and when recording is finished, it introduces a noticeable freeze delay into the capture being previewed in a GPUImageView (another outputFilter target)."

I notice the the freeze delay in GPUImageView also...