videoanalysis: add snapshot pipeline

plugins/objectdetector/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/objectdetector",
-   "version": "0.0.105",
+   "version": "0.0.106",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/objectdetector",
-         "version": "0.0.105",
+         "version": "0.0.106",
          "license": "Apache-2.0",
          "dependencies": {
             "@scrypted/common": "file:../../common",

plugins/objectdetector/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/objectdetector",
-   "version": "0.0.105",
+   "version": "0.0.106",
    "description": "Scrypted Video Analysis Plugin. Installed alongside a detection service like OpenCV or TensorFlow.",
    "author": "Scrypted",
    "license": "Apache-2.0",

plugins/objectdetector/src/main.ts

@@ -53,11 +53,15 @@ class ObjectDetectionMixin extends SettingsMixinDeviceBase<VideoCamera & Camera
     newPipeline: {
       title: 'Video Pipeline',
       description: 'Configure how frames are provided to the video analysis pipeline.',
-      choices: [
-        'Default',
-        'Snapshot',
-        ...getAllDevices().filter(d => d.interfaces.includes(ScryptedInterface.VideoFrameGenerator)).map(d => d.name),
-      ],
+      async onGet() {
+        return {
+          choices: [
+            'Default',
+            'Snapshot',
+            ...getAllDevices().filter(d => d.interfaces.includes(ScryptedInterface.VideoFrameGenerator)).map(d => d.name),
+          ],
+        }
+      },
       defaultValue: 'Default',
     },
     motionSensorSupplementation: {