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Old 12th October 2020, 13:31   #681  |  Link
lello
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A very interesting feature for those who, like me, have a 21: 9 aspect ratio screen, is the automatic detection of black bars. Unfortunately the black bands are not detected when using DXVA2 or D3D11 native decoding.
But using DXVA2 for decoding (copy back), my RX580 can't cope with BD UHD 4k: is there a way to detect black bands even with native DXVA and D3D11 decoding?
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Old 12th October 2020, 15:21   #682  |  Link
Manni
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is there a way to detect black bands even with native DXVA and D3D11 decoding?
Not yet. Also BD Menu in jRiver (if you use that) is only available with copyback, not with native.
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Old 12th October 2020, 15:24   #683  |  Link
lello
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In fact, that's why I don't use menus. And is there any possibility of a solution soon?
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Old 12th October 2020, 16:08   #684  |  Link
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Probably not.
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Old 12th October 2020, 23:22   #685  |  Link
Asmodian
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In fact, that's why I don't use menus. And is there any possibility of a solution soon?
The native solutions do not copy the decoded video data to CPU memory so the CPU cannot be used to detect and discard black bars.

I don't know the specific technical reasons but it is harder to do the black bar detection on the GPU, some algorithms only run on the CPU and black bar detection is one of them. I consider it very unlikely that madshi will create a black bar detect and discard that runs on the GPU anytime soon but I do remember long ago mentions of wanting to implement madVR fully on the GPU so it is not out of the question if it is technically feasible.
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Old 13th October 2020, 09:48   #686  |  Link
angmav
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I have an unusual question to ask and sorry if this is being asked in the wrong section is it possible to change lav filter settings from copy back to native depending on the video playback in particular I was hoping to use copy back for 23hz playback and native playback for 60hz/50hz


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Old 29th November 2020, 18:53   #687  |  Link
lello
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I wanted to try SmoothVideo Project to try to improve the smoothness of my projector with 4k movies (frame interpolation only works with HD video) and by pure chance I found that, using SVP, black band detection also works with D3D11 decoding .

I did the double check and disabling SVP the detection no longer occurred: what is it due to?

Too bad that with SVP + madvr I can't convert 4k videos from 24 to 60hz, otherwise I would have bought it.
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Old 29th November 2020, 19:33   #688  |  Link
huhn
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SVP is not native so there is your answer it's d4d11 copyback and that can do cropping using blackbar detection.
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