FlexRes Quality uses a codec developed by Green Hippo to combine low playback overhead with better visual quality.
Strengths
- Choose what quality and colour sub-sampling is required
- 4:2:0 Quality 7 has comparable quality as FlexRes Performance with a smaller size on disk in most circumstances. (better compression)
- Good at encoding live (not rendered) content
Weaknesses
- Higher Quality and colour spaces can dramatically increase playback load.
- Relies partially on the computer’s CPU for decoding
- Computer generated content with gradients and uniform colours do not compress well
Resolution Limits
- Height and Width must be divisible by four.
- Max Resolution: 16,384 × 16,384
- Minimum Resolution: 64 × 64
Frame Rates Supported
- Up to 60 FPS
Alpha Support
- Yes
FlexRes Quality has three encoding settings:
- Chroma Sub-sampling One method of image compression reduces the colour space of the video by only encoding certain colour channels for each 2 × 2 pixel block of video. The specifics of this process extend beyond the scope of this manual. In brief, 4:2:0 is encoding only half as much colour information as 4:4:4 which does not compress the colour data at all. The most visible artifact from colour compression is banding in colour gradients (as similar colours are rounded together forming a band) and steppy diagonal lines in areas of high contrast.
- Quality In addition to colour, FlexRes Quality also carries data out compression per frame. The degree of this compression is user configurable with 10 being visually lossless and 1 being very highly compressed.
- Tiling Tiling is an internal method that Hippotizer uses to optimise playback of greater than HD clips. It is best to leave this set to automatic.
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