With the software render it is rendered by your CPU not your GPU. You will not be able to get 4:4:4 or 10bit rendering options with this. Your bits per pixel density will be lower resulting in an overall slightly lower end bit-rate.
DaVinci Resolve only supports Uncompressed .AVI or GoPro Cineform .AVI. If you choose either of these as the codec of your script in VirtualDub2 then you will not have to convert your scripted AMV before importing it into DaVinci Resolve.
If you want a smaller scripted AMV file size, and you picked MagicYUV or Lagarith Lossless Codec, then you will have to convert this into a format that DaVinci Resolve can use.
The fastest way to convert your video is by importing your scripted AMV into VirtualDub2 and picking ‘GoPro Cineform’ → ‘Configure’ → then pick ‘Filmscan 3’ as the quality.

Since it is Lossless compression, the file will be big but, it will encode very quickly, even for a 4K video. You can delete it soon after you finish encoding the final in DaVinci Resolve as well as the original scripted AMV file.
Go to File → Save video

Open DaVinci Resolve and Import your GoPro Cineform AVI encode that just completed.


**H265 Master Format: Quicktime Codec: H.265 Encoder: AMD or Intel (Native will also automatically select your CPU) Network Optimization: ✓ Resolution: 3840x2160 Framerate 23.976 (or whatever your project’s framerate is) Quality: Best Encoding Profile: Main Rate Control: Constant QP AQ Strength: 2 Bypass re-encode when possible: X
Audio Settings: PCM Uncompressed 24 bit 48,000Hz Stereo Bus 1**



