So I have a video of a screen capture. Within the screen capture there is a section of video that had low audio. Is there a way to split the section that contains the quiet video, and increase that selections volume? 

In other words. There is a section in the video that is quiet. I want to make it louder. I have tried using the Video Tools -> Video volume option and increased the volume. This did not work. 

Help please and thank you

-Corinne Ocamb