Send/Receive data through SDI cable

[Reinis Muižnieks]

Thanks! Will take a look at subtitles :) Tho in my case I don't need to
send any video with it


On Tue, Sep 14, 2021 at 6:40 PM Simon Brown <simon.k.brown at gmail.com> wrote:

>
>> I have an interesting problem on my hands where I need to send data in
>> one direction and SDI seems to solve this issue. I would have a decklink
>> card at each end. 2 ways I see how to do it:
>>
>> * Send information as byte stream. Rewrite each frame data with bytes I
>> have.
>> * Encode information in video as text and use OCR on other end.
>>
>> I do prefer first approach as it is more efficient, tho seeing info in
>> video could be beneficial.
>>
>> I was wondering if anyone has done something similar?
>> Are there any gstreamer plugins that could help me with this?
>> If I go with first approach do I have to worry about data corruption?
>>
>> Maybe I over engineer stuff a bit and there is a better one way
>> communication that doesn't involve ethernet cable and firewall?
>>
>> Thanks!
>>
>
> Well if you insert eg subtitles then I would hope the decklink would be
> able to encode those into a data packet on the SDI, eg as OP47 or SMPTE
> 2031 data, which the receiver could then decode.  And if you want visual
> feedback you can get an SDI player that puts the subtitles onto the screen.
>
> Cheers,
> Simon
>
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