Casparcg as SRT to NDI decoder

General
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1

Hi! I have started to play around with live SRT feeds to use for remote production, for example video mixing on Paperspace machines and would like a way to convert multiple camera/video feeds ti NDI in order to bring into any vision mixer workflow. Right now, this can be achieved by native SRT support in Vmix, but there are more GPU-friendly (hence cheaper) systems like VidblasterX out there.

The downside then is that I need another step of getting the SRT feed into the mixer… VLC can also do this but have been a little shaky when I tried this with multiple instances.

I have tried to achieve this by, in the official client, using the custom command PLAY 1-10 srt://0.0.0.0:000 (as I saw someone here suggested). I downloaded a newer FFMPEG build than the one included in server 2.3, but the server prompt window tells me that I got an error and nothing plays…

Is there some better way of how to achieve this, prefferably that doesn´t require programming skills? It would be very helpful if I could get this piece sorted out

2

A bit off topic for a CasparCG forum: have you considerd to use VLC player to play the SRT stream and use the NDI plugin for VLC to send the NDI?

3

Yes, but my experience was that VLC became a little shaky with artifacts in the NDI picture, srt not reaching through every time etc.

4

There is an open issue about this in git hub.
https://github.com/CasparCG/server/issues/1251

5

This is your product… SRT to NDI with multiple sources: https://garaninapps.com/srtminiserver
Have fun :slight_smile:

6

It seems vidblasterX (from its specs) supports UDP multicast streams.
Decapsulate SRT to UDP and feed directly to your vidblasterX (instead of transcoding to an intermediate like NDI) . If you do just stream copy from SRT to UDP (not NDI) then even VLC will work ok.