NDI source element?

[Alfonso Rodriguez]

Hi everyone,

I am a developer at TELTEK Video Research. We are currently using GStreamer on our recording software, Galicaster.

We have recently been looking for a GStreamer NDI source element but we haven't found anything so far. Is anybody working on adding some sort of NDI support to GStreamer? We are considering to develop a plugin for this and were wondering whether someone was also interested/already working on it.

Thanks!

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[Nicolas Dufresne-5]

Le jeudi 08 mars 2018 à 09:19 +0100, Alfonso Rodriguez a écrit :
> I am a developer at TELTEK Video Research. We are currently using
> GStreamer on our recording software, Galicaster.
>
> We have recently been looking for a GStreamer NDI source element but
> we haven't found anything so far. Is anybody working on adding some
> sort of NDI support to GStreamer? We are considering to develop a
> plugin for this and were wondering whether someone was also
> interested/already working on it.

No one have proposed a patch yet. If I understood well, the ffmpeg
support was provided by NewTek themself. I see that their proprietary
library headers are MIT license, and the library can be dlopen(). So I
guess it's doable, though, it will likely remain niche as it cannot
easily be distributed (e.g. in Fedora, Debian, etc.), so there will be
very few people testing it (reminds me of the DeckLink support). Other
then that, I know very little about the protocol itself.

There is also a very similar protocol that landed recently, it's called
SRT. It's maybe a competing technology, not certain. They made the
libsrt an Open Source library in order to give more flexibility to
their user. SRT is supported by VLC/FFMPEG and GStreamer. Though, it's
targeting unreliable and/or unsafe network (but not restricted to),
while I think NDI is for fully reliable and safe network (correct me if
I'm wrong here).

Nicolas
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[Olivier Crête-3]

On Thu, 2018-03-08 at 10:12 -0500, Nicolas Dufresne wrote:

> There is also a very similar protocol that landed recently, it's
> called
> SRT. It's maybe a competing technology, not certain. They made the
> libsrt an Open Source library in order to give more flexibility to
> their user. SRT is supported by VLC/FFMPEG and GStreamer. Though,
> it's
> targeting unreliable and/or unsafe network (but not restricted to),
> while I think NDI is for fully reliable and safe network (correct me
> if
> I'm wrong here).

SRT is for compressed MPEG-TS.. NDI is for almost uncompressed, so it's
a different use-case.

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Olivier Crête
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[PN]

I put in a big vote for wanting an NDI source element.

Paul



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[Sebastian Dröge-3]

On Wed, 2018-04-25 at 09:25 -0700, PN wrote:
> I put in a big vote for wanting an NDI source element.

If anybody wants to work on it, it's not going to be very difficult
around the NDI SDK. I'm aware of a few closed source implementations
but none of them consider releasing it as free software unfortunately.

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Sebastian Dröge, Centricular Ltd · https://www.centricular.com

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[Ruben Gonzalez]

Hi everyone!

For the last months here at Teltek we have been working in adding support for the NDI [1] standard to GStreamer. We worked with the sponsorship of the University of the Arts London and The University of Manchester and are pleased to announce that we are in advanced QA fase and our first release will be available very soon [2].

The NDI plugin is written in Rust [3] and has two source elements, ndivideosrc to get video from the stream and ndiaudiosrc for audio. By just providing the name or the ip of the stream, all the information required from the stream is picked up automatically, such as resolution, framerate, audio channels,...

Feel free to try it. All feedback is welcomed!

[1] https://www.newtek.com/ndi/

[2] https://github.com/teltek/gst-plugin-ndi/releases

[3] https://www.rust-lang.org/

El mié., 25 abr. 2018 a las 18:57, Sebastian Dröge (<[hidden email]>) escribió:

On Wed, 2018-04-25 at 09:25 -0700, PN wrote:
> I put in a big vote for wanting an NDI source element.

If anybody wants to work on it, it's not going to be very difficult
around the NDI SDK. I'm aware of a few closed source implementations
but none of them consider releasing it as free software unfortunately.

--
Sebastian Dröge, Centricular Ltd · https://www.centricular.com
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