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Black screen with ROHQ

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ppataki:
I am using LAV 0.70 and madVR 0.91.10
If I switch off Hardware Acceleration the picture comes back, however the CPU starts to sweat

I have found kind of a workaround though:
- change video mode to Advanced - Custom
- add source/splitter: LAV Splitter and LAV Splitter Source
- add video decoder: LAV and audio decoder: LAV
- add video renderer: madVR

if I do this DXVA is still not enabled however the CPU stays much cooler; no idea why
also noticed that if I change video renderer to video renderer (with integrated decoding) using madVR the picture goes black, the same way as using ROHQ with Hardware Acceleration on

Hendrik:
There really is no huge difference between using a custom LAV and the built-in LAV, assuming you use the same version in both. MC uses 99% default settings for LAV Video.

Disabled Hardware decoding obviously is the "None" hardware acceleration in LAV, so it should be pretty much identical in performance.

Enabled Hardware decoding in MC depends on your GPU, and RO Standard or ROHQ, since the different modes don't work equally well on all systems.
- In RO Standard, "DXVA2 Native" is used on all GPUs as the preferred mode
- In RO HQ, "DXVA2 Copy-Back" is preferred for NVIDIA and Intel GPUs, while "DXVA2 Native" is used for AMD (because Copy-Back is often quite slow on AMD)

So basically, I don't see how adding a custom LAV would resolve anything, unless the version you have installed in your system is actually a different one, and/or hardware acceleration settings are different.

That leaves madVR, which is actually quite more likely. We don't really support people manually upgrading madVR - its certainly possible to do, but we can't really offer support for that case.
I would recommend several steps to try to figure out what is actually at fault:
1) Change the advanced mode and only specify madVR as video renderer, not any splitter or decoder (it'll automatically use the built-in versions then), and test that config
2) Use plain RO HQ, delete the madvr plugins folder and let MC re-install the version its currently shipping with, and see if that resolves it
3) If even 2 above didn't help, then additionally go into the MC madvr plugins folder and execute the "restore default settings.bat" file. Note however that this will remove any custom madVR settings you may have performed.

If either one of those works, I would bet on a conflict in the madVR settings somewhere. Perhaps the version within MC you manually upgraded still uses the madVR settings file from the far older version we included with it - and as experience has shown, sometimes madVR doesn't really like running on old config files, especially when big changes to the options structure happened, like it did in 0.91

Upgrading madVR can be a bit finnicky at times, especially if you happen to be running two different versions, since madVR stores its setting in the registry so those two versions can collide and possibly make a mess of your settings.

ppataki:
Thank you Hendrik for the explanation!

Based on that I have managed to find the issue:
in Custom mode if I use DXVA Copy-back I have perfect picture but if I change it to DXVA Native the screen goes black!
So indeed it is a LAV (or AMD) issue

Now we know where the issue is, I hope somebody will be able to fix it too
On the other hand, DXVA Copy-back just works fine too, CPU load is torelable using an Intel E3 CPU

Hendrik:
I might switch it to DXVA2 Copy-Back for AMD as well in ROHQ, DXVA2 Native is a bit unpredictable with madVR, especially on AMD cards. Worst case it runs a bit slow, but not black screen.

ppataki:
I agree, that would be great!
Thank you

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