how to enable buffer visualization dumping in Movie Capture play mode

can you check inside your post-process material that its blendable location is “Before ToneMapping” or “After ToneMapping”.

It should be before “Before ToneMapping”. If that doesn’t work then go to your project settings and inside “Rendering setting”, go to post-process setting and turnoff all other setting except “Ambient Occlusion”. Mostly that should work.

Thanks,