TUTORIAL TO CAPTURE TOP QUALITY UHD HDR CONTENT

1. The setup: Connect your hdmi cable from hdmi output of 4k uhd player and plug into input hdmi jack of splitter. Then plug in another hdmi cable into output jack to the decklink capture card. You need to  have another cable routed to a 4k monitor or TV to see where you are in the movie. Because you cannot capture on virtualdub with video preview or audio running at the same time you will have to select no video under video tab and no playback because it will cause it to drop frames while capturing.
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3. Things you need to buy: A capable computer with i7 Skylake or Kabylake or Amd Ryzen 7 Series with Nvidia Card for 10 bit decoding. 16 GB  of Ram and 1TB of SSD space. You will need a splitter to strip the HDCP 2.2 signal to be able to capture it. Blackmagic decklink 4k mini recorder.
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6. For the actual capturing you need to first set the capture file (go to file then capture avi to enter capture mode) then file again and look for set capture file.
7. You will want to set your capture drive to at least 1TB in size with a minimum Read/write speed of 200Mb/s I highly recommend against hard drives unless you have raid configuration of 3 or more drives.
9. If disk is too slow the capture will be ruined and you have start over again.
10. In case nothing shows up go to device tab and select “Blackmagic WDM capture” not Decklink video Then you go to Video settings and go down to compression and select Magicyuv 422 10 bit codec then press configure and select median encoding.
12. For Audio select “Capture Device” and for compression select no compression and under raw capture format select 16 bit 8 Channel 48000HZ. No under the capture tab make sure Drop frames and insert null frames are checked in and under resin mode make sure to select sync video to audio by adjusting video timing.  
14. Once that's set up you can now begin your capture make sure you don’t have any inserted or dropped frames. Typically the max threshold is about 1 second of dropped frames  if its in the beginning  or end of the capture like at the start don’t worry thats fixable but if its in the middle or gradually throughout the video it the whole capture is ruined. Some ways to prevent this is to not use the computer at all when its capturing or you can try lowering the block size under capture settings within the Disk I/0 option.  
16. Once the movie is captured you can now check if the audio lines up with the video. Recommend grabbing the audio tracks off the blurry disc ahead of time or online and test to see if it lines up with the captured video. Expect the captured video to be shorter than the original length of the  movie so you are going to need to adjust for negative audio delay. I typically do  this on MPHC buy manipulating positive and negative delay, which i have bound to plus and minus keys.
18. Once you have found the correct delay to use. you can now proceed to encoding. Typically you want to use CRF 18 and medium preset. If the encode will take  more than a day i recommend ultrafast preset with CRF 10. Also make sure you are using X265 10 bit CPU encoding.  If your cpu can handle medium in reasonable amount of time i reccommend that first to ensure best quality.
20. The rest of the settings you can just copy into custom field. Once encoding is done make sure HDR works if you are encoding HDR and check for any over saturation or like skin being too red. If everything looks good then you can rip other audio languages and subtitles from normal bluray disc. You can merge it together in this program called MKVtoolnix. There make sure you enter the negative or positive delay  that you found earlier to sync the audio and subtitle tracks . Hopefully once have finished this your video should be ready for posting.
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23. Reccomended encoding settings to use: --crf 16 --preset medium --profile main10 --colorprim bt2020 --colormatrix bt2020nc --transfer smpte-st-2084
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