Removing buffer from AVAssetWriter before outputting to file

Question

I have an app that is like Vine or Instagram Video and I am trying to delete the last recorded segment. I am using AVAssetWriter and appending the sample buffer to the asset writer input when recording but I want to allow users to delete the last sample buffer that was recorded.

Is there a way to remove buffer appended to AVAssetWriter? I check the documentation and there is no methods to delete buffer.

Answer 1

You can use a fixed sized FIFO queue to cache the recent buffers instead of writing them directly. If the user decides not to delete the last buffers, then you write the remaining buffers in the queue.