[Metal] With Metal as GPU backend activated playback in MovieClip editor is much slower than OpenGL #105606
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Reference: blender/blender#105606
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System Information
Operating system: macOS-13.2.1-x86_64-i386-64bit 64 Bits
Graphics card: Metal API AMD Radeon Pro 580 1.2
Blender Version
Broken: version: 3.5.0 Beta, branch: blender-v3.5-release, commit date: 2023-03-09 12:15, hash:
dcfc9629c2f2
Worked: (newest version of Blender that worked as expected)
Short description of error
I have a regression here.
Loaded a EXR sequence (around 3GB Memory) in the MovieClip Editor for tracking.
When I have OpenGL activated as GPU backend, I get a playback speed of 30fps (realtime).
With Metal activated as GPU backend, it stutters around between 6-7fps.
Exact steps for others to reproduce the error
Start with VFX Template
Load an EXR sequence into the MovieClip Editor
Set "Scene Frames" and Framerate (30fps)
Prefetch
Press Play
An addition to that:
I have the feeling, that the whole MovieClip Editor display is much slower that with OpenGL or in 3.4.1 . Paning the view around is one example ... Seems to be a problem with the viewer itself ...
[Metal] With Metal as GPU backend activated playback im MovieClip editor is slower than OpenGLto [Metal] With Metal as GPU backend activated playback in MovieClip editor is much slower than OpenGLI can have a look into this, perhaps hitting a slow path with AMD-based GPUs as a few of the texture update paths are optimized for Unified-memory-architecture in Metal, but this could result in slower flushes on discrete memory systems, which could explain slow video playback.
@Michael-Parkin-White-Apple Thanks a lot. As also written before, it's not only in Playback situations, also when paning the frame around mit MMB.
Have a fix coming in for this soon :)