Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Sound › Wedding audio › I have done this many time
I have done this many times and have even used a headphone out on the sound board directly to mic in with outstanding results. Of course you have to set the level out and in but I have had very good results. Definitely have a backup though. Never rely on only 1 source (especially when you rely on a third party sound board operator).