Blackmagic Forum

Hello, during development we noticed that some VANC lines are missing.

The Card receives 10bit PAL with various VANC lines.
There is data in lines
7-15,
20-22 und
320-328, (32-40)
333-335 (45-47)

But the card only recognizes data in lines
8-14
20-22
33-40 (321-328)
45-47 (333-335)

=> data is missing in lines 7 and 32 (320).
This data is missing when parsing the data from the filter and when viewing the pins output preview.
We tried to Capture the lines 7-9 and 31-33 with the "Capture to movie file line 1-3" Feature in the Blackmagic Design Control Panel. But those lines are empty there too.
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We checked the input data with a Dektec-2144 card and there the lines appear, so we are100% sure that there is data in the signal.

We are using the most current driver Version 10.3.5.

With these facts we guess that there might be a driver/filter problem.
Can anyone approve?

When can this problem get a fix?

Best regards
Christoph Krause

//Edit:
The Same problem appears with the Decklink duo

I took some time to access the lines directly via the api.

Same result.
line 7 and line 320 which should have data are empty

Api Version: 10.1.1

Hi Christoph,

The VANC lines below the digital switching point (line 8) and other switching points, such as the field 2 switching point (line 320) will not be captured.

To access the full range of valid VANC lines in frame, you could try using a card from the DeckLink Extreme series, such as a DeckLink 4K Extreme.

cheers

Could i get the same problem with HD-SDI when capturing SMPTE2031?
And are there also driver issus?

Thanks,
Florian