So we render out png sequences and 9 out of 10 times the last frame or 2 of my png sequence will be black, and/ or black with the lower third on top. I tried re rendering the last 2 frames.. which look fine in the prview, but black in the render...then i tried extending my comp and re rendering the frames again with the same problem again...I dont understand what is causing the blackout
Only thing i can suggest is to double check that your source footage's interpretation settings and your comp settings match. Make sure some pull down setting or frame rate value didn't get changed from what you believe it to be. Get the basic sleuthing out of the way first.