2023-10-03 02:30:11 +01:00
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# AJA Video Cards ❤️ Nix
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This repo contains a Nix flake containing the open source AJA driver, utilities and
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gstreamer plugin. This allows you to use Aja video IO cards on NixOS.
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## Usage
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- Add the flake to your system flake's inputs.
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2023-10-18 18:58:58 +01:00
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- Enable the module by adding the following to your system config:
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2023-10-03 02:30:11 +01:00
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```nix
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2023-10-18 18:58:58 +01:00
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ntv2.enable = true;
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2023-10-03 02:30:11 +01:00
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```
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## Gstreamer
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Summon a quick network stream: `gst-launch-1.0 ajavideosrc input-channel=0 mode=29 ! videoconvert ! jpegenc quality=20 ! multipartmux boundary="--videoboundary" ! tcpserversink host=0.0.0.0 port=6969`
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NB: You must select the video mode to match what's on the input. Otherwise you will see
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something like:
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```
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Setting pipeline to PAUSED ...
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Pipeline is live and does not need PREROLL ...
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Pipeline is PREROLLED ...
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Setting pipeline to PLAYING ...
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New clock: GstSystemClock
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WARNING: from element /GstPipeline:pipeline0/GstAjaVideoSrc:ajavideosrc0: Signal lost
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Additional debug info:
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gstajavideosrc.cpp(1324): gst_aja_video_src_create (): /GstPipeline:pipeline0/GstAjaVideoSrc:ajavideosrc0:
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No input source was detected - video frames invalid
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```
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You can find all the supported video modes with: `gst-inspect-1.0 ajavideosrc`.
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