[v2,2/2] gst: Document libcamerasrc multi stream usage
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Message ID 20240605174447.139942-3-nicolas@ndufresne.ca
State Accepted
Commit b7225c887a5e81229afba5fb7d5778403ae8d6af
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  • Document libcamerasrc multi stream usage
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Commit Message

Nicolas Dufresne June 5, 2024, 5:44 p.m. UTC 
From: Nicolas Dufresne <nicolas.dufresne@collabora.com>

This adds documentation and an example using gst-launch-1.0.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 README.rst | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

Patch
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diff --git a/README.rst b/README.rst
index 1da7a3d6..86c2b713 100644
--- a/README.rst
+++ b/README.rst
@@ -178,6 +178,22 @@  Which can be received on another device over the network with:
    gst-launch-1.0 tcpclientsrc host=$DEVICE_IP port=5000 ! \
         multipartdemux ! jpegdec ! autovideosink
 
+The GStreamer element also supports multiple streams. This is achieved by
+requesting additional source pads. Downstream caps filters can be used
+to choose specific parameters like resolution and pixel format. The pad
+property ``stream-role`` can be used to select a role.
+
+The following example displays a 640x480 view finder while streaming JPEG
+encoded 800x600 video. You can use the receiver pipeline above to view the
+remote stream from another device.
+
+.. code::
+
+   gst-launch-1.0 libcamerasrc name=cs src::stream-role=view-finder src_0::stream-role=video-recording \
+       cs.src ! queue ! video/x-raw,width=640,height=480 ! videoconvert ! autovideosink \
+       cs.src_0 ! queue ! video/x-raw,width=800,height=600 ! videoconvert ! \
+       jpegenc ! multipartmux ! tcpserversink host=0.0.0.0 port=5000
+
 .. section-end-getting-started
 
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