Posts by shawnstoked

Thanks for the improvements in Beta3! I've tested the same Profile 7 FEL content with fast rendering disabled and enabled.

There does seem to be a noticeable improvement with fast rendering enabled:

• Fast rendering OFF: 119 skipped frames over approximately 60 seconds.
• Fast rendering ON: 67 skipped frames over approximately 130 seconds.
• Both sessions reported 0 dropped frames and 0 presentation failures.

The tests weren't identical in duration or playback position, but with fast rendering enabled, the skipped-frame counter increased much more slowly after the initial playback period, with several intervals showing almost no additional skips.

I'm still seeing repeated OutputPicture - timeout waiting for buffer messages in both sessions.

I also noticed the following message:

CB1 FEL upscaling: VAAPI unavailable, using full shader FEL reconstruction

It looks like the Vega 8 isn't benefiting from the new VA-API FEL upscaling optimization.

Quote from CroqueMr

Not normal and never saw this issue, what CPU do you have?

Thanks a lot I am finalizing to integrate the last improvement lever from tour last build, and I convert your optimization for AMD also. I will check the new oprimisation gain.

Edit : Last improvement integrated, it's your chroma filter, this will be optional because it's reduce a little bit the fidelity (around 0,9%) of chrominance. Looking extremely closely at a shot where the discrepancy is at its greatest, you can perceive a tiny difference in the outline of the light halos. It's almost imperceptible and, above all, only visible in very few shots, but since it still has a tiny visible impact, it will be an optional optimization.

Now I work to implement Onecinema's build and I will push the beta3

Thank you for the feedback, beta3 will have some new performance gain. It will help your CPU handle FEL.

Opening ny GUI will increase framedrop. If you do not open anything and leave the film in full screen do you have frame drop?

I know Kodi only tracks one type of frame drop, so the counter isn’t perfect. But I don’t think expanding it to count every dropped frame would be particularly useful, it would also include drops caused by the GUI, which don’t occur during fullscreen playback with the interface hidden.

Display More

Thanks for the response! Looking forward to trying Beta3.

Yes, the skipped-frame counter continues to increase even during uninterrupted fullscreen playback with the GUI hidden. However, the counter doesn't seem to correlate with any noticeable stuttering on screen, so I'm not sure how accurately it reflects actual playback performance.

Do you think the buffer timeouts could be related to the FEL processing overhead, or potentially an AMD-specific frame presentation issue?

I'll report back once I've had a chance to test Beta3.

Ryzen 5 3500U / Vega 8 – Dolby Vision FEL frame skipping on R1.0.0 Beta2

I'm testing R1.0.0 Beta2 on a Ryzen 5 3500U with Radeon Vega 8 graphics, connected via HDMI through a Denon AVR.

Dolby Vision Profile 7 FEL playback works, including enhancement-layer processing, but I'm seeing skipped frames accumulate during playback.

System:

• CPU: AMD Ryzen 5 3500U
• GPU: Radeon Vega 8 (amdgpu)
• Build: R1.0.0 Beta2
• Kodi: 22.0 RC1
• Kernel: 7.2.6
• Mesa: 26.2.3
• Playback: 4K HEVC Dolby Vision Profile 7 FEL, 23.976 fps
• Output mode: DV Standard (TV-led)

What I'm observing:

• The skipped-frame counter increases during playback, sometimes quite rapidly.
• The skipped frames don't appear to correlate with scene complexity or visible stuttering.
• The dropped-frame counter remains at zero.
• The video queue is generally around 97–100% full.
• The log repeatedly reports:
  • OutputPicture - timeout waiting for buffer
  • CRenderManager::AddVideoPicture - timeout waiting for render
• The display correctly switches to approximately 23.976 Hz.

The logs suggest that frames are being delayed somewhere in the decoding/rendering/presentation pipeline, although I'm not sure whether this is a GPU performance limitation or an AMD driver synchronization issue.

Any hardware you guys need tested? Was looking at getting a mini pc with a Ryzen 3500u