More > JRiver Media Center 31 for Windows

Use a 4K capture card to tone map all sources with JRVR(?) Which cards will work

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JimH:
There's little difference between live and recorded, from a user point of view.

Yaobing:
JRiver Media Center can either record a show to disk or render the show on screen live.  I don't know how Video Processor work, so I can't comment on that.

jmone:
I had a bit more of a play using my Blackmagic Ultrastudio 4K to forward a video/audio feed from an NVidia Shield to MC.... and it works..... but there are some limits to think about:
- HDCP:  I could not (as expected) play any protected content, you will need an HDCP stripper for such content.  No issue with non protected content. 
- Video Output Format: You will need to find a capture card to output/passthrough the Video Formats (incl HDR) that you want.  My BM WDM video output seems to only offer UYVY, 8-Bit, 4:2:2 (at various resolutions / framerates) regardless of what the source is, looks good but you then don't get any HDR tonemapping in JRVR/madVR etc.
- Audio Output Format: You will need to find a capture card to output/passthrough the Audio Formats you want.
- Changing Refresh Rates:  MC will let you change refresh rates of your monitor on starting a playback but, you can not do this dynamically once the video playback/capture has started.  This can be an issue if the source device uses one refresh rate for it's menu etc then a different one for the actual video.  You will probably want to pre-set the display frequency before commencing. 

pixelpusher15:
I emailed AverMedia support asking if they supported HDR with other applications and they said no. I think this is a known thing based on some older conversations on AVS. I believe the HDR metadata is stripped out so everything appears washed out. VideoProcessor apparently maintains this when working with BlackMagib cards since it is directly using the SDK. From my understanding VP and JRiver don't work together as of now. But, what I'm now wondering is if I can add back in HDR metadata via an HDFury device. My Vertex2 allows for custom HDR to be injected. I could easily do this but it would be the same for each piece of content. I can also control it with my Harmony remote. I already have to switch picture modes for HDR so this could just be another command, turn the custom HDR on/off based on HDR or SDR. I thought this might work since it is my understanding that JRVR and MadVR pretty much ignore the metadata when doing their DTM goodness.

There are a few assumptions and "my understandings" here so all of this could fail. I do have a BlackMagic DeckLink Mini 4K coming today so I can start testing with that. It doesn't support 4K60 though.

The framerate handling is a concern for me. I'm not sure what to do about that as of now.

bogdanbz:
I don't believe there are any 4K video capture cards that support capture of HDR content at the full HDMI 2.1 bandwidth of 48 GBps (or at least 40 GBps), so it's likely better to wait for availability of such cards first.

I also considered using a 4K capture card to perform real-time color correction in software, since I switched from a LG OLED to a Sony OLED TV that has no uploadable hardware LUT for this. The plan was to redirect the graphic card output to one of its inputs, do the color correction, and use the capture card output to drive the TV display. Other brands you may look into besides BlackMagic and AVerMedia are Magwell, Elgato, Datapath Vision.

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