opt slider

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/plugin/pl_player/controller.dart

@@ -1607,6 +1607,7 @@ class PlPlayerController {
         videoShot = {'status': false};
       }
     } catch (e) {
+      videoShot = {'status': false};
       debugPrint('getVideoShot: $e');
     }
     _isQueryingVideoShot = false;

lib/plugin/pl_player/view.dart

@@ -1796,7 +1796,9 @@ Widget buildSeekPreviewWidget(PlPlayerController plPlayerController) {
   return Obx(() {
     if (!plPlayerController.showPreview.value ||
         plPlayerController.videoShot?['status'] != true) {
-      plPlayerController.getVideoShot();
+      if (plPlayerController.videoShot == null) {
+        plPlayerController.getVideoShot();
+      }
       return SizedBox.shrink(
         key: ValueKey(plPlayerController.previewDx.value),
       );