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Video Resolution Gotchas

Mental Model​

In Resolume, the 'input' composition and screen 'output' resolution are controlled independently. However in Davinci Resolve we're limited to the resolution the clip/timeline for both the input and the output. So we need to keep these resolutions in mind:

  • Resolume composition resolution (the 'input' resolution in Resolume)
  • Resolume advanced mapping screen resolution (the 'output' resolution)
  • Davinci clip resolution.

VideoRemap will display these resolutions at all times.

If we're using VideoRemap as a timeline effect, then the clip resolution will always match the timeline resolution.

If we're using VideoRemap as a Fusion node, then the clip resolution will be the resolution of the video that is being piped into the VideoRemap node in Fusion.

VideoRemap works by:

  1. Taking the input clip, treating it as the 'composition' (in Resolume terms),
  2. Cutting it up into Resolume input slices
  3. Mapping those input slices to Resolume output slices
  4. Rendering those output slices onto our clip's output

So with all of this in mind, you might run into situations where the various resolutions here are not matching up.

Fit Input to Mapping​

In situations where the clip resolution doesn't match the resolume output resolution, the resulting mapping might be cut off or appear small. This is because VideoRemap will try to not mess with the resolutions that we give it.

So if we have a clip of 1920x1080 and a resolume output resolution of 2560x1440 (both an aspect ratio of 16:9) with slices in the bottom left of the output, those bottom left slices will look cut off as we're effectively cuting out a 1920x1080 window out of the 2560x1440 output, where the center is the top-left corner.

Sometimes, we do want to fit the output so that it doesn't get cut off like that. This can be done by selecting the Fit Input to Mapping options. This option will stretch/squish the output so that it always fits the clip resolution.

In the 1920x1080 clip and 2560x1440 example, turning this feature on will make VideoRemap squish down the resolume output resolution to 1920x1080, thus avoiding any cutoffs.