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1st October 2018, 00:24 | #641 | Link | |
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I'm using a decklink black magic card and the source is a UHD-BD played with my HTPC, my uhd player or my media player, it doesn't matter. the results are all the same. this one was done with the Nvidia shield (USB). Last edited by imhh11; 1st October 2018 at 01:47. |
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1st October 2018, 03:56 | #642 | Link |
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I see FFMPEG supports capture over BMD Decklink:
https://trac.ffmpeg.org/wiki/Capture/Blackmagic Maybe worth looking into as an alternative if you are familiar with FFMPEG. I don't know how feasible it would be to capture and encode to x265, tone mapping included, as a single command operation. You'd have to research the subject and test. You could certainly do it with FFMPEG as a two stage process - capturing first to a 10-bit YUV422 'near lossless' intermediate, like DNxHR HQX. But I can't see that would offer any particular advantage over your existing two step process - I'd stick with VDub2 capture to Cineform (Filmscan 2) if that works for you. Just bear in mind that the resulting bitrates (and so file sizes) of your Cineform captures will be somewhat dependent on the complexity of the video content. But the same applies to lossless formats, like MagicYUV, also.
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Nostalgia's not what it used to be Last edited by WorBry; 1st October 2018 at 04:42. |
1st October 2018, 05:07 | #643 | Link |
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I think there are some issues, at least with screenshots provided in post 639 . I made sure to save them and verified them by size. I didn't look at the "RAW" versions, just the others
The biggest easy one to see is the bottom of the blue dress . Look at the texture loss at the bottom in both magicyuv and cineform compared to the source. The noise and grain pattern is smoothed over . There are some color sampling issues too . Look at the small yellow flower spots. Some of the smaller ones almost disappear in some spots in the cineform screenshot . The source has more "orange" spots, but they become yellow and more desaturated . Even the magicyuv screenshot is affected (albeit less) I think there is an issue with that capture setup , and or method of taking screenshots EDIT: or did I misunderstand ? Those were re-encoded x265 screenshots ? So those were caused by x265 ? That would make more sense Last edited by poisondeathray; 1st October 2018 at 05:28. |
1st October 2018, 12:11 | #644 | Link |
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the smoothing on grain is definitely coming from the x265 encoder even if I used --no-soa and --no-strong-intra-smoothing
thanks for pointing out the yellow flowers, I didn't notice it. I'll have to investigate what's causing this, I don't think this is an encoding issue. screenshots were made the same way with madvr hdr to sdr pixels shader (200nits) so this is not the issue but just to be sure, I'll try to encode the source with the same setting. I'll also try to capture uncompressed to see if it changes anything. Last edited by imhh11; 1st October 2018 at 12:16. |
1st October 2018, 16:16 | #645 | Link |
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You re-encoded it to 10bit 4:2:0 right? So you would expect some color loss going from 4:2:2 to 4:2:0 , so that could be within expected limits
But then again, the original, original, was UHD BD right? UHD 4:2:0 ? So there might be a problem... |
1st October 2018, 16:44 | #646 | Link |
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yes, the source is 10bits 4:2:0, shied played it in 12bit 4:2:2, capture is 10bits 4:2:2 and encode is 10bits 4:2:0.
how come it changes only the colors of those yellow flowers and not the other colors? and how come cineform is worse? i'll test uncompressed later today. |
1st October 2018, 16:51 | #647 | Link | |
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And you'd expected cineform to be very slightly worse, but there are more differences there than I would expect |
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1st October 2018, 18:27 | #648 | Link |
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FYI, That SDK I gave you awhile back had source code showing how to add NVenc.
----- Any Progress on adding BT.2020 / ST.2084? It's been about a year since I last asked, Maybe you made some progress in that area or adding HDR to capture mode. Also any chance we will see more functions added to x265 codecs (Like the VUI & Bitstream) areas? Last edited by Revan654; 1st October 2018 at 18:59. |
1st October 2018, 18:58 | #649 | Link | ||
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I used the following Codec, Which works in VD2(It's like the x264 Codec): https://sourceforge.net/projects/mpx.../x265vfw_v280/ As for FFMPEG, It's kind of doable from what I understand, but you are likely to run into Framedrops due to the Tonemapping + x265 at the same time. It would be very useful to split it up the process on multiple GPU's. One GPU handles all the tonemapping and the other deals with compression. Not sure if FFMPEG support multiple process on different devices. There are other Standalone Software that Supports Blackmagic like Adobe and Vegas. Along with there own DaVinci Resolve. If all else fails you could try those. If External encoding is ever added to VD2 Capture mode. Allot more doors would open. You could pipe data through to other encoders. I know it was said it was possible but, not sure if any kind of development has been done for that. If I was familiar with C# I would help out the dev on VD2. Quote:
The buggy Drivers is one of the reason why I avoided them when I upgraded my Capture System. Plus at the time starting price for the card was 1500 dollars vs another company(Exactly same features) for 800 dollars. There Win7 drivers for Intensity series is a mess. |
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1st October 2018, 22:59 | #651 | Link | |
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I went with Magewell for my Setup, Since they were the only ones I could find that supported Fully Rec.2020 and Had allot of hardware Functions that are missing in others. Base Functions can reach 12 Bits as well with full 7.1 Audio. If your PC can handle it 144FPS recording. |
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2nd October 2018, 01:30 | #652 | Link |
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ok so after a couple more tests, I cannot get the same colors as the source with those small yellow/orange flowers. Magicyuv, cineform, uncompressed, other players, MediaExpress: all the same. it's not an encoding issue because encoding the source directly with the same settings output proper colors
so unless im doing something wrong in Vdub (doubt it), i guess it's because the decklink mini 4k cannot do Bt2020 even if they say it can on the box. smh Last edited by imhh11; 2nd October 2018 at 02:44. |
2nd October 2018, 02:54 | #653 | Link | |
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Dumb question (maybe)...but what was the reported colorspace of the Cineform and MagicYUV captures? You didn't include that portion of information from the MediaInfo report. And your file uploaded didn't include samples of the original captures.
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Nostalgia's not what it used to be Last edited by WorBry; 2nd October 2018 at 03:14. |
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2nd October 2018, 02:58 | #654 | Link | |
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Did you check x265 with lower crf or lossless ? Because I suspect lack of Rec.2020 support won't cause those types of issues you're referring to . It looks more like a chroma subsampling or lossy CbCr (high quantization) issue in the screenshots (but that could just as easy be from x265). Take a look at the Cb or Cr plane (granted, I'm looking at an 8bit PNG, but you can see right away the problems) , you will see general blurriness and encoding artifacts . Small color details like those small flowers will be blurred away eg. #Your PNG ConvertToYV24() UtoY # or VtoY So check lower crf or lossless x265 first, if problem still there go back 1 more step and look at direct capture (e.g magicyuv) |
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2nd October 2018, 03:08 | #655 | Link | ||
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Capturing uncompressed in Mediaexpress gave the same result. if I make an mkv with the avi file, mediainfo report more but still nothing on bt709 /bt2020 Video ID : 1 Format : V_MS/VFW/FOURCC / M0Y2 Codec ID : V_MS/VFW/FOURCC / M0Y2 Duration : 1 s 710 ms Bit rate : 398 Mb/s Width : 3 840 pixels Height : 2 160 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (23976/1000) FPS Bits/(Pixel*Frame) : 2.002 Stream size : 81.2 MiB (100%) Default : Yes Forced : No Quote:
when i encoded the source with the same setting CRF17 slow.. the colors stay perfect Last edited by imhh11; 2nd October 2018 at 03:13. |
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2nd October 2018, 03:16 | #656 | Link | |
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4:2:0 => 4:2:2 => 4:2:0 . You would expect some blurring if they were not using nearest neighbor (aka point resize in avisynth) , so very small color details will be expected to be blurred. But you have compression artifacts on top as well. Encoding source bypasses that up/down scaling step But it still looks like something additional is going on too |
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2nd October 2018, 05:30 | #658 | Link |
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Ah, yes you're right, MediaInfo doesn't report the color matrix/primaries. Vdub2 will report the Cineform capture as Rec709 though.
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Nostalgia's not what it used to be Last edited by WorBry; 3rd October 2018 at 03:11. |
2nd October 2018, 12:38 | #659 | Link | |
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x265: which options will be game changing? I reviewed the list and honestly all remaining options look too low level (do not fit simple UI).
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3rd October 2018, 00:45 | #660 | Link | |
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tone mapped http://screenshotcomparison.com/comparison/121830 I tried re-installing the BM drivers, no luck maybe its the best my card can do. magic yuv 422 8 bit HDYC capture VS source ----> no issue at all ?? how the hell.. http://screenshotcomparison.com/comparison/121857 Last edited by imhh11; 5th October 2018 at 01:14. |
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