Three fixes:
1. imageCubeArray: enabled via VkPhysicalDeviceFeatures (core 1.0 feature)
instead of VkPhysicalDeviceImageCubeArrayFeatures (wrong sType in pNext
chain was interpreted as VkExternalMemoryImageCreateInfoNV)
2. Swapchain format: reverted to B8G8R8A8_SRGB (was UNORM which driver
didn't support → fell back to A2B10G10R10 10-bit format=58 → wrong
pixel layout for capture)
3. Video colors: SRGB→linear conversion via 256-entry LUT in
ReadCapturedBuffer. SRGB swapchain gives gamma-compressed bytes,
FFmpeg expects linear. LUT converts each B/G/R channel using
standard SRGB formula: s<=0.04045 ? s/12.92 : ((s+0.055)/1.055)^2.4
Also: video captures before ImGui (no UI in recording)
emil28092005
9531b1e9d5