Fix for issues #160 and #164

...tialized if the bit rate changes from 0 to a valid number

This fixes the issues #160 and #164
Simple one line fix. The audio codecs were trying to reload even though they were okay because the bitrate was changing from 0 (which I assume was idk uninitialized or something) to the proper value (mine was 192000). Added a flag to make sure that didn't happen and now all my broken videos play properly.