ProRes 4444 XQ Apollo 4x Slow Artifact and Blocking

I’ve attempted to use Apollo to slow 4x both a 4608 × 3164 MXF (OP-1a) and a ProRes 4444 XQ file (same footage). There appears to be random artifacts and discolored block appearing randomly throughout the clip. I have attached two screenshots to highlight the issue. It is subtle, but you can truly see the effects playing the clips. The issue also appears when using the Chrono algorithm, and when exporting image sequences (EXR & DPX).

MacBook Pro
16-inch, 2021
Chip Apple M1 Max
Memory 32 GB
Storage 1TB
macOS Ventura 13.5.2

Topaz Video Al v3.4.1 & v3.4.4

2023-09-19-15-58-34-Main.tzlog (255.5 KB)


Hello, could you send us a note at so that our team could take a closer look at this bug? Thanks!


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