Having issue with rendering fly through of a scene in Sequencer

I’m making a flythrough for my scene by using sequencer and I’m having issues with it.

1.It captures the scene darker as compared to what I have in the viewport.

  1. The final capture video is very jerky and doesn’t play smoothly

So far I have tried turning the post-processing depth to 0 in camera setting and still getting the same result.I have tried capturing Image(PNG OR BMP) and go the same result (Images are dark)

This is the first time I’m using the sequencer So if anyone can help me would be great, As I have thing due in 2 days and got this issue.