3rd Gen AMD Ryzen Threadripper (Page 1 of 2)

Hi @Chainik do I need to do any changes in my config below for 10Bit HDR playback? Or in SVP Settings?

ontop
audio-exclusive=yes

demuxer-thread=yes

video-latency-hacks=yes

vo=gpu
profile=gpu-hq
fbo-format=rgba16hf
gpu-api=vulkan
gpu-context=winvk
hwdec=nvdec-copy
spirv-compiler=shaderc

vd-lavc-dr=yes
vulkan-async-transfer
vulkan-async-compute
vulkan-swap-mode=fifo

volume-max=100

tone-mapping=hable
hdr-compute-peak=yes

scale=ewa_lanczossharp
cscale=ewa_lanczossharp
dscale=ewa_lanczossharp
dither-depth=auto
correct-downscaling=yes
sigmoid-upscaling=yes

deband=yes
deband-iterations=4
deband-threshold=50
deband-range=16
deband-grain=48

sub-ass-shaper=complex
sub-font-size=35
sub-scale-by-window=yes
sub-pos=100
sub-align-x=center
sub-align-y=bottom
sub-margin-y=3

glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\KrigBilateral.glsl"

profile-desc=cond:get('height', 0) < 1440
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\FSRCNNX_x2_8-0-4-1.glsl"
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\SSimDownscaler.glsl"

Blackfyre
> do I need to do any changes in my config below for 10Bit HDR playback?
> gpu-api=vulkan
> gpu-context=winvk

it only works with gpu-api=d3d11 and the latest mpv build (shinchiro's 20191102 or today's SVP update)

and turn on HDR in Windows display settings first!

>>1. VLC is limited to 3x FRC rate, so ~72 fps is the max

So, technically 144Hz monitor could be used OK but 120Hz are not that preferable.

Reason 2

After reading the following 2 posts from this thread: https://www.svp-team.com/forum/viewtopi … 95&p=2 I think that quad-channel memory is the minimum for the most demanding situations, and the last quote may even indicate that octa-channel memory could also be useful:

Chainik, could you comment on the above quotes and give some information as SVP developer about the impact that the number of channels and memory speed can have on smooth playback (SVP) of 4K 10bit HDR movies on a 4K 144Hz monitor? Also could you write if SVP has any limitations as to the number of CPU threads it can support in parallel, please?

Thanks. I really like VLC, because unlike mpv it can properly display menus from DVD and BR. However, I am a little concerned about the quote from this thread: https://www.svp-team.com/forum/viewtopi … 98&p=5

Can somebody tell me what the problem is after the last update of VLC?

UHD
> Can somebody tell me what the problem is after the last update of VLC?

1. it only works well with a software decoder (and decoding of 4K HEVC is rather demanding)
2. VLC's filter chain is single-threaded so the overall performance is somehow limited by a single-threaded CPU performance. BTW this was also the case for mpv before the last year (single-threaded output frames copying).

So mpv is much better in terms of performance and flexibility.

> about the impact that the number of channels and memory speed can have on smooth playback (SVP) of 4K 10bit HDR movies on a 4K 144Hz monitor?

I know that 4K/10-bit in mpv works on mine Ryzen 1700 @3500 MHz at ~2800 memory speed. Not with the highest settings though, but I don't thing the "highest" (i.e. "half-pixel mode") is even needed for 4K.

I have used the built-in TV player in the past to test HDR content, back when SVP didn't support HDR.

It's the Sony KD-43X8000D, it's a VA Panel unlike the larger sizes so the dark scenes on it look good. But its motion interpolation is not great, unlike the higher end models, and peak brightness on it is 400 Nits, so HDR content on it doesn't look as great as higher end models I have seen and watched content on that have a peak brightness of 1000+

However with MPV and the tone-mapping setting chosen and those shaders, HDR content converted to SDR look great!

TV Colour Space setting is always set to BT.2020
nVidia Control Panel I change colour format to YCbCr422 and colour depth to 10bpc
MPV settings are as shown above, this yields the best picture quality possible, sharpness, colour reproduction, and contrast ratio.

There is only one issue. With 4K HDR content every 10 to 15 minutes, at random places in any 4K HDR video, I drop 15 to 20 frames for like one second and it goes back to normal. It's not related to the scene, when I rewind to check the scene again there is no issue, just a small spike in CPU usage. I reported it a while ago. The only fix I found is setting Processing Threads to 40 in ALL Settings. This makes it drop only 1 frame when that spike happens instead of 15 or 20, so barely noticeable.

Thanks, but the most important thing is missing here: on which monitor/TV do you watch 4K/10-bit HDR movies and do you use x2 (48Hz), 60Hz, x3 (72Hz) or maybe x5 (120Hz) interpolation?

I also still haven't received any answer to my question: how many CPU threads can SVP with mpv support in parallel?

If you right click SVP the maximum threads in the options is 21, however if you go on additional options, then click ALL Settings. You can scroll down and change "threads" to however many you want manually. But I am not sure if there is an actual limit on the back-end of operations. Wait for Chainik to answer that question.

Also possible that it hasn't been tested beyond a certain amount of threads, so the answer is unknown. For example if the maximum they have tested is on a 24 core (48 thread) processor and it works fine and utilises all, but if you go beyond that, it's unknown territory and it should theoretically work, but who knows? Maybe not. I am just guessing here. The option however to change thread count to any number you want is available in All Settings.

Thanks for the settings information, I'm sure it'll come in handy.

Yes, these two bolded are the two things that interest me the most. The first one can only be answered by Chainik. On the second one, maybe there are also SVP users who are currently using HEDT CPUs, hence my thread.

But don't worry in your case if you get one of those listed TV's above that are high-end TV's. You will notice the difference. My TV's maximum brightness is 400 Nits, so even when HDR works the difference wouldn't be as noticeable. The panel itself is decent, but nowhere near the TV's you listed above.