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14th May 2015, 20:58 | #101 | Link | |
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i wonder if a RGB -> YCbCr conversation is used when chroma and luma is doubled at the same time. |
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14th May 2015, 21:27 | #102 | Link | |
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Luma is Y and chroma is Cb and Cr.
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madVR options explained Last edited by Asmodian; 14th May 2015 at 21:31. |
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14th May 2015, 22:32 | #103 | Link | |
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15th May 2015, 03:31 | #104 | Link | |
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Updated for v0.88.7
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Thanks for the feedback, I hope this new chart makes sense. Like any other feature, chroma doubling doesn't do anything if it isn't enabled so I felt the explicit path for chroma doubling disabled wasn't helpful.
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16th May 2015, 03:24 | #105 | Link | |
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16th May 2015, 04:10 | #106 | Link | |
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If I did include it I suppose I would simply add NEDI image doubling to the black "image upscaling or downscaling" box and call the current "image doubling" box "NNEDI3 image doubling".
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28th May 2015, 01:36 | #107 | Link |
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Small updates for 88.10.
still more to do.
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madVR options explained Last edited by Asmodian; 28th May 2015 at 01:42. |
5th June 2015, 01:57 | #108 | Link |
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Good write up - thanks.
Any chance of adding in the registry entries - particularly the ones to turn off driver dithering in AMD
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13th June 2015, 10:15 | #109 | Link | |
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I also don't know those AMD registry entries. Don't you only want to use them when testing if a display is really 10-bit? The drivers dithering any conversion they do seems good.
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13th June 2015, 10:17 | #110 | Link |
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Updated for madVR v0.88.11.
I also moved Known Limitations or Complication out of the first post for space. Most of these are somewhat obscure so hopefully not much is lost. Known Limitations or Complications: -madVR can't do frame packed 3D -When using a 3DLUT madVR can generate out of gamut values when displaying WtW unless it is emulating the GPU LUT when using 'enable windowed overlay'. -Native DXVA decoding has some negative ramifications such as it is impossible to use force film (IVTC) or xy/vsfilter for subtitles. -madVR cannot handle p010 (10-bit) input from DXVA native. -madVR IVTC can detect a lot of cadences but can "only" handle some of them correctly. For example the rare cadence 3:2:3:2:2 (25 fps in 30i 60 fields) does not work well. -madVR currently always switches to 23Hz when having forced film mode on while playing 59i content.
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madVR options explained Last edited by Asmodian; 15th June 2015 at 19:52. |
14th June 2015, 08:38 | #111 | Link | |
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I don't see any issues with it at my end (though I don't have any material that needs IVTC nor do I use xy/vsfilter) and DXVA native seems to have a lower overhead than copyback or Cuvid. |
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14th June 2015, 08:48 | #112 | Link |
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IMHO, You shouldn't use DXVA native with madVR at all really, using DXVA2-CopyBack is probably a better combination.
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LAV Filters - open source ffmpeg based media splitter and decoders |
14th June 2015, 09:09 | #113 | Link | |
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CopyBack shares GPU bus with madVR, right? Sometimes GPU is too busy with madVR to route additional LAV's decoding traffic there. |
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14th June 2015, 09:18 | #114 | Link |
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At least if you're using NVIDIA (and maybe on Intel? I forget), madVR will perform a "copy-back" anyway as thats the only way to preserve full chroma quality. So in that case, its better to just use Copy-Back from the get-go and avoid any limitations in madVR.
madVR used to have a trade quality option to disable this copy-back and risk bluring chroma a bit, but I think madshi removed it recently. Not sure if he worked-around the chroma limitation differently without costing much performance, or just decided to not offer the trade option anymore...
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LAV Filters - open source ffmpeg based media splitter and decoders |
14th June 2015, 09:33 | #115 | Link |
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I have Intel g1830 on workstation and AMD 7750 on HTPC. After upgrading from 5450 (64 bit bus) to 7750 (128 bit bus) I started with DXVA CB and had no issues untill I tried full 1920x1080 (with no borders) video. It looked stuttering with perfect madVR OSD stats in same time. I switched LAV from DXVA CB to DXVA native and playback turned to smooth again.
You see now why I'm very carefull with DXVA CB. Though CB is still the best solution for havy bitrate telecined videos. Asmodian, sorry if it looks like off-topic, lets just aware AMD users do not use havy madVR settings with LAV DXVA copy-back ) Last edited by Qaq; 14th June 2015 at 09:44. Reason: off-topic issue fixing |
14th June 2015, 12:07 | #116 | Link | |
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14th June 2015, 13:14 | #117 | Link |
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No, I don't have that movie anymore. And whats the point anyway? You don't want to test it totally different environment and say "everything is alright", do you?
My point is that DXVA copy-back puts additional load on GPU (GPU bus at least), which BTW is already too busy with madVR. Do you agree or not? |
14th June 2015, 14:00 | #120 | Link |
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i tried that but with no really findings.
the load difference is so small it's hard to measure. but i don't have a weak GPU currently the weakest i have is a HD 4000 and a HD 4400 both a IGPU with ddr3 speed and not with gddr5 which is worlds faster. |
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