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Video and audio out of sync

Hi there,
It is my first time post here and i would appreciate some help from you.

I am getting a very weird issue related to Video and Audio out of sync.  I purchased Screenflow 10 recently and trying to setup a recording enviroment with a Canon T5i as Webcam and Blue Yet external microfone on my iMac. The Cannon is connected directly to my iMac via USB (Micro-USB to USB), the Blue Yet microfone also directly connected to. Problem is when i am using Screenflow the audio starts off about 3s after the video. I can't use the AUSampleDelay filter option because it works on opposite way ( video delay). I have tried the other tests:
2) Run the same setup with Logitech 920 and Screenflow -> it works fine no delay (Problem here, not good quality);
3) Run the same setup (Canon, Blue Yet) with OBS software, it works fine no delay (Problem here - Not video editing tool);
4) Use Canon HDMI output-> Camlink, Blue Yet and Screenflow- It works fine no delay (Problem here - Even with Magic lantern no good and full size output, better only on new cameras).

So, i would like to run the first option mentioned above, maybe i am missing some specific configuration or other audio filter option available.

Thank you in advance,
Glaucio

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