Very odd situation here, not something we have seen before. If it is not affecting the output then its possibly an issue with resource allocation for the live export preview that is struggling.
Hi Kyle,
This display bug happened just after the installation of Topaz Video 1.6.1. version.
Since I restarted my computer, no more problems.
I am using the latest NVIDIA Studio drivers for RTX 5090M.
Kind regards, Vincent.
Hi Kyle,
And I got same weird display with Instant viewer, and even worse!
Black vertical lines:
But also sometimes total video corruption:
If I move the playhead to another time, the video comes back with black vertical lines.
Exports are okay, just Instant viewer.
I am using NVIDIA Studio 610.47 version.
Best regards, Vincent.
Workaround: Zoom in / Zoom out.
The image comes back!
Hi Kyle,
This is a technical report generated by Microsoft Copilot.
(Prepared for Topaz Labs Engineering Team)
After updating to Topaz Video AI 1.6.1 and the latest Windows 11 Pro build, the Instant Viewer inside the Export panel displays severe visual corruption during rendering.
The exported video files themselves are perfectly correct, and the issue affects only the real‑time preview.
The corruption appears as:
vertical black lines
partially decoded frames
full‑frame corruption
flickering blocks or unreadable preview output
This behavior did not occur in previous versions of Topaz Video AI.
Laptop: MSI Titan 18HX
GPU: NVIDIA (latest Studio Driver)
OS: Windows 11 Pro (latest update installed)
Topaz Version: 1.6.1
Workflow: High‑end restoration and upscaling (Proteus Standard + Proteus Natural, 10‑bit pipeline)
The system is stable and has never shown GPU decoding/encoding issues in other applications.
Open any project in Topaz Video AI 1.6.1
Start an export using any model (Proteus Standard, Proteus Natural, etc.)
Ensure Instant Viewer is enabled
Observe the real‑time preview during export
Result:
The preview becomes corrupted with vertical lines or unreadable frames.
Expected behavior:
Instant Viewer should display a clean, synchronized preview of the current export frame.
The final exported video is always correct (no corruption).
The issue appears only in the Instant Viewer pipeline.
Switching the Display Backend from DirectX 12 → OpenGL reduces but does not eliminate the issue.
Disabling Instant Viewer completely removes the problem.
GPU temperatures, VRAM usage, and system load remain normal.
The same workflow was stable in Topaz Video AI 1.5.x.
The issue is likely related to one of the following internal changes in 1.6.1:
The corruption resembles a desynchronization between decode → inference → preview, possibly due to:
DX12 video processor changes
NV12 → RGB conversion path
frame buffer reuse or race conditions
The latest Windows update introduced:
new GPU scheduling
new HDR/SDR blending behavior
updated DX12 video stack
This may affect the preview renderer.
When GPU decoding is enabled, preview corruption becomes more frequent.
Disable Instant Viewer
Switch Display Backend to OpenGL
Disable GPU decoding
Use Topaz Video AI 1.5.5 for preview‑critical workflows
These workarounds confirm the issue is isolated to the preview subsystem, not the export engine.
Could the engineering team please:
Verify the DX12 preview pipeline in 1.6.1
Test Instant Viewer under Windows 11 WDDM 3.2
Check for buffer synchronization issues in the export preview
Provide a temporary patch or confirm if a fix is planned for 1.6.2
This issue affects professional workflows where real‑time preview is essential.
