Adjust timing of captions when converted from Speech to Text transcript

I'm using the early version of the Speech to Text feature and I love it. It is really accurate and easy to use. The only thing I don't like so far is that when it converts the transcript to captions (using the subtitle option), it creates captions that are often very short (less than 1 second). This is not usable for my purposes and I was wondering if there is a way to adjust this setting to force the captions to be longer when being converted from the transcript. Sometimes the caption is only 2 or 3 words and up for less than a second, making it very difficult to read and follow. I know I can merge captions, but that is a lot of extra work to go through and fix. 

Thanks!