Windows > Third Party Plug-ins, Programs, and Skins

Blackmagic decklink Capture Filter Testing

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mattkhan:
https://github.com/3ll3d00d/ezcapture

This thread is about a variant of https://yabb.jriver.com/interact/index.php/topic,140134.msg972062.html which uses the decklink api to support blackmagic capture cards

it's in testing state atm but seems stable enough to try to use it, feedback welcome

current testing version can be found at https://github.com/3ll3d00d/ezcapture/releases/tag/0.7.0-alpha.9

pls use this variant for testing -> bmcapture-0.7.0-alpha.9-release-trace-logging.zip

as then logs are available

installation instructions, basically admin cmd and then regsvr32 the ax file (NB: rename it bmcapture-trace.ax if using trace)

a few things to note if you try it

* I only have a decklink mini 4k here so testing is a bit limited
* it converts everything to 8 bit RGB internally right now because it's the only format natively supported by jrvr (better transformations will come later)

Hendrik:

--- Quote from: mattkhan on April 12, 2025, 03:02:21 pm ---ok thanks, is there a post somewhere that explains how to interpret the jrvr video timing log?

--- End quote ---

No, the log is basically designed for me. Although with the headers you can sort of make sense of it, i guess.
Note that its layout changes based on presentation mode.

jmone:
Sounds good, I'll give it a try and report back!

jmone:
Here is a quick test from my Camera (and I'll be away till the easter weekend).  I tried with both UHD/50fps 709 and HLG signals (see attached pics).  Here are some notes:
- Audio was just static that came and went (note: I was just sending 2ch from the Camera and the filter was saying 8ch)
- The filter seems to be "persistent" and holds the device till you close both MC and MC Server (otherwise you get a black screen in MC if the input signal changes between playbacks)
- 709:  Just worked and looked good
- HLG:  Just worked and looked good, I see that the Colour Format was 2020, but the Transfer function was 709 not HLG

Overall, nice work!  I'll try with a PC next.

jmone:
Did a test from a Laptop playing and HDR Test Clip using MC so I could see that it was outputting HDR correctly.  The input was only seen as SDR.

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