And before that, skillful users can customize video's parameter by clicking 'Settings' to change resolution, bitrates, sample rate or using the built-in volume booster to increase video volume. Multiple out-of-sync files can be fixed at one time by using the batch conversion mode. Click 'Run' to fix the incorrect audio/video sync permanently.Step 2: Launch OBS Studio, Click '+' icon under 'Sources' window, and select 'Video Capture Device', then select 'CA FLINT LXT Video Device' in the drop box next to 'Device': Step 3: Set Audio Output Mode to 'Output desktop audio (WaveOut), Audio Device to 'Microphone (CA FLINT LXT Audio)':.Made a workaround for a decklink device driver issue where decklink/blackmagic devices could very slowly go out of sync in the blackmagic source (make sure buffering is disabled if you have this issue buffering is now disabled by default) - Disabled v-sync preview rendering on mac to prevent it from having an impact on performance