Update stream-zed to support specifying the camera

nix/pkgs/stream-zed/stream-zed.sh

@@ -1,21 +1,48 @@
-# Launch a gstreamer producer that reads from "/dev/video0" (which is assumed to
-# be a ZED Mini camera or similar) and stream the frames to the shared memory
-# "/tmp/zed_camera_frames")
+#!/bin/bash
+
+# Launch a gstreamer producer that reads from a specified camera device (default
+# "/dev/video0") and streams the frames to the shared memory "/tmp/zed_camera_frames"
+
+# Usage examples:
+#
+# 1. Default usage:
+#    Stream from the default camera device (/dev/video0) at 100 fps.
+#    $ stream-zed
+#
+# 2. Specify a different camera device:
+#    Stream from a specific camera device (/dev/video1) at 100 fps.
+#    $ stream-zed /dev/video1
+#
+# 3. Specify a different frame rate:
+#    Stream from the default camera device (/dev/video0) at 60 fps.
+#    $ stream-zed --fps 60
+#
+# 4. Specify both camera device and frame rate:
+#    Stream from a specific camera device (/dev/video1) at 60 fps.
+#    $ stream-zed /dev/video1 --fps 60
 
 function run() {
-    local fps=100 # default fps
+    local fps=100  # default fps
+    local device="/dev/video0"  # default camera device
 
+    # Process the command line arguments
     while [[ "$#" -gt 0 ]]; do
         key="$1"
         case $key in
             --fps)
-                fps=$1
+                fps=$2
+                shift 2
+                ;;
+            *)
+                device=$1
                 shift
                 ;;
         esac
     done
 
-    gst-launch-1.0 -v v4l2src device=/dev/video0 \
+    echo "${device} ${fps}"
+
+    gst-launch-1.0 -v v4l2src device="$device" \
                    ! video/x-raw,format=YUY2,width=1344,height=376,framerate="${fps}"/1 \
                    ! shmsink socket-path=/tmp/zed_camera_frames sync=false \
                    wait-for-connection=true shm-size=10000000