Poor rendering quality for H264 in Resolve, on Win7

Hey everyone,

I'm new here and I have an issue rendering proper H264 files. I don't know if this has already been discussed here... if it was, then someone please point me to the right topic

I am running Davinci Resolve 12.5.5 lite. I have a simple timeline (HD, 23.976p) and I am trying to render a QT H264 at the same framerate and image size (HD). My video source files are DNxHD 115, but it does not actually matter, I have the same issue with all kinds of sources.

I set the quality of the render "Restrict to" 6.5 Mb/sec. Everything goes fine, but when I check the actual bitrate of the export, it's about half of what I wanted... (3.78 Mb/s).
So I try again with best automatic settings and I get 26.30 Mb/s.
Then I set the restricted version again, at 20Mb/s this time. I get the 3.78 Mb/s again! So no matter what restricted value I use, I still get no more than 3.78 Mb/s!

So my Resolve cannot set a target bitrate for H264 and stick to it. If I choose "best settings", well, that's not a custom bitrate, it's just what Resolve considers it's best for me

The fun thing is that if I try the exact same recipe on a Mac, it works fine
Hopefully someone has some suggestions?


Cristi

I have exactly the same issue in the latest version of Resolve, did you ever find a solution?

I have exactly the same issue in the latest version of Resolve, did you ever find a solution?

resolve uses the windows libraries for h.264 encoding, witch are quite mediocre in their image quality.
you should use an external x264 based tool (ffmpeg, handbrake etc.) to archive much better results.