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

Blackmagic decklink Capture Filter Testing

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jmone:
Couple of other things:
 - the audio "static" thing, is actually over the top of any other audio, I even get it when the video is paused.
 - it is all a bit "fragile", in that if you get any signal mismatch you end up with a black screen (eg everything needs to be in the same FPS, and the BMD device seems to get stuck in a particular FPS).

mattkhan:
thanks for testing, tbf I wasn't expecting stability at this point :)

can someone fork these posts to a new thread on a public board? I guess they're better there as they are about decklink devices specifically


--- Quote from: jmone on April 14, 2025, 12:45:04 am ---- Audio was just static that came and went (note: I was just sending 2ch from the Camera and the filter was saying 8ch)

--- End quote ---
I was surprised by this also, the SDK reports the card has 8 channels so that's what I set the output format as but I thought capture was 2 channel only


--- Quote from: jmone on April 14, 2025, 12:45:04 am ---- 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)

--- End quote ---
as far as I can see, MC never destroys the filter once it's loaded it until server shutdown which, to my mind, seems a bit odd. I would think the filter would be destroyed after playback stops (and hence the filter graph is torn down) but that's not how MC works as far as I can see. It seems a bug to me.


--- Quote from: jmone on April 14, 2025, 12:45:04 am ---- HLG:  Just worked and looked good, I see that the Colour Format was 2020, but the Transfer function was 709 not HLG

--- End quote ---
will check it, I hadn't thought about HLG tbh (don't have any such sources)


--- Quote from: jmone on April 14, 2025, 01:28:22 am ---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.

--- End quote ---
for this case, it will be really helpful if you can use the trace filter and post the log it generates

JimH:
CEO-Elect is Back:  https://yabb.jriver.com/interact/index.php/topic,141053.0.html

mattkhan:
@jmone updated 1st post, there's a new build which hopefully fixes many of the issues you noted

jmone:
Thanks mate, I'll give it a go when back home later this weekend!

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