Open to recordings with pre-buffer (#11143)

* Open to recordings with pre-buffer

* Reduce buffer

* Use variable for preview FPS

web/src/types/preview.ts

@@ -1,3 +1,5 @@
+import { REVIEW_PADDING } from "./review";
+
 export type Preview = {
   camera: string;
   src: string;
@@ -5,3 +7,6 @@ export type Preview = {
   start: number;
   end: number;
 };
+
+export const PREVIEW_FPS = 8;
+export const PREVIEW_PADDING = REVIEW_PADDING * PREVIEW_FPS;

web/src/types/review.ts

@@ -48,3 +48,5 @@ export type MotionData = {
   audio?: number;
   camera: string;
 };
+
+export const REVIEW_PADDING = 2;