FlexRes Performance

Building on the widely used HAP family of codecs, FlexRes Performance offers very low playback load with reasonable visual quality. The HAP codec uses GPU based decoding (the graphics card) to playback video which generally results in better overall system performance. HAP typically has a lower compression ratio than FlexRes Quality so encoded media can take up more space on disk and requires greater disk read performance.

To encode to FlexRes Performance, select it in the Media Manager settings.

Strengths

• Very low playback overhead

Weaknesses

• Reduced colour space can result in banding especially with colour gradients.
• Colour sub-sampling carried out in 4×4 pixel blocks can make diagonal lines appear ‘steppy’.
• Low compression ratio results in large files on disk

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, in FlexRes Performance Alpha only

FlexRes Performance offers four encoding options:

Performance Uses basic HAP; Offers the lowest data rate with the most compression. Visual artifacts are most noticeable on high contrast diagonal lines (where it will appear as steps) and in colour gradients: especially in warm colours.

Performance Alpha Uses HAP-Alpha; adds alpha transparency support to HAP. Due to the extra data of the alpha channel, media file size and playback load is higher than that of normal HAP.

Performance High Quality Uses HAP-Q: offers improved image quality with a similar data rate and load as HAP-Alpha. Does not support alpha transparency.

Performance High Quality Alpha Uses HAP-QA: offers improved image quality and Alpha with a slightly higher load to that of HAP-QA.

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.