8K Pro SDI output 3G levelB -- dual link payload ID ?

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bockor

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  • Joined: Thu Mar 05, 2020 11:09 am
  • Real Name: bernard willaert

8K Pro SDI output 3G levelB -- dual link payload ID ?

PostWed Mar 11, 2020 10:06 am

We use the 8K pro as SDI test image generator only.
We want to mimick a specific camera that outputs 1920x1080p60 YCbCr:422:10 3G B Rec.709.
With the Phabrix SDI analyser we see 2 payload IDs : one for Y-Pos [LinkA = 8C 05 00 01] and one vor Y-Pos [LinkB = 8C 05 00 41].

When I set the output to 1920x1080p60 - levelB,
I can reproduce one of the payload IDs by adding an ancillary packet to our output frame. The second ID however seems fixed Y-Pos LinkB =8A 4B 00 41.

Any suggestions how to insert 2 proprietary payload IDs that overwrite the native IDs for both LinkA and LinkB ?
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Cameron Nichols

Blackmagic Design

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Re: 8K Pro SDI output 3G levelB -- dual link payload ID ?

PostFri Mar 13, 2020 5:52 am

Hi Bernard,

Payload Byte 1 of 8C corresponds to ST 425-1, 2 x 1080-line video payloads in 3G-SDI. This mode is not supported by the DeckLink - this is 2 HD-SDI dual-streams interleaved into 3G-SDI signal, not to be confused with dual-link 3D (payload 8A) which is supported.

The payload ID is set by the DeckLink hardware, there is no way to override the payload ID in the DeckLink SDK.

Regards
Cameron
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bockor

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  • Real Name: bernard willaert

Re: 8K Pro SDI output 3G levelB -- dual link payload ID ?

PostMon Mar 16, 2020 7:42 am

Thanks, Cameron !

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