Fix VideoSlider initialization and video loading flow

- Properly remove the previous seekbar from the status bar before re-initializing it.
- Ensure the seekbar is fully set up after the video file is loaded, and update its properties accordingly.
- Moved frame loading and UI setup after seekbar initialization to ensure proper video processing and UI synchronization.
- Adjusted the threading and frame worker initialization to align with the new flow.

annolid/gui/app.py

@@ -2177,8 +2177,6 @@ def openVideo(self, _value=False,
 
         video_filename = str(video_filename)
         self.stepSizeWidget.setEnabled(True)
-        if self.seekbar:
-            self.statusBar().removeWidget(self.seekbar)
 
         if video_filename:
             cur_video_folder = Path(video_filename).parent
@@ -2200,37 +2198,21 @@ def openVideo(self, _value=False,
                 self.video_loader = None
                 return
             self.fps = self.video_loader.get_fps()
-
             self.num_frames = self.video_loader.total_frames()
+            if self.seekbar:
+                self.statusBar().removeWidget(self.seekbar)
             self.seekbar = VideoSlider()
             self.seekbar.input_value.returnPressed.connect(self.jump_to_frame)
             self.seekbar.keyPress.connect(self.keyPressEvent)
             self.seekbar.keyRelease.connect(self.keyReleaseEvent)
             logger.info(f"Working on video:{self.video_file}.")
             logger.info(
                 f"FPS: {self.fps}, Total number of frames: {self.num_frames}")
-            # load the first frame
-            self.set_frame_number(self.frame_number)
-
-            self.actions.openNextImg.setEnabled(True)
-
-            self.actions.openPrevImg.setEnabled(True)
 
             self.seekbar.valueChanged.connect(lambda f: self.set_frame_number(
                 self.seekbar.value()
             ))
 
-            self.frame_loader.video_loader = self.video_loader
-
-            self.frame_loader.moveToThread(self.frame_worker)
-
-            self.frame_worker.start(priority=QtCore.QThread.IdlePriority)
-
-            self.frame_loader.res_frame.connect(
-                lambda qimage: self.image_to_canvas(
-                    qimage, self.filename, self.frame_number)
-            )
-
             self.seekbar.setMinimum(0)
             self.seekbar.setMaximum(self.num_frames-1)
             self.seekbar.setEnabled(True)
@@ -2248,6 +2230,24 @@ def openVideo(self, _value=False,
             self.statusBar().addWidget(self.playButton)
             self.statusBar().addWidget(self.seekbar, stretch=1)
             self.statusBar().addWidget(self.saveButton)
+
+            # load the first frame
+            self.set_frame_number(self.frame_number)
+
+            self.actions.openNextImg.setEnabled(True)
+
+            self.actions.openPrevImg.setEnabled(True)
+
+            self.frame_loader.video_loader = self.video_loader
+
+            self.frame_loader.moveToThread(self.frame_worker)
+
+            self.frame_worker.start(priority=QtCore.QThread.IdlePriority)
+
+            self.frame_loader.res_frame.connect(
+                lambda qimage: self.image_to_canvas(
+                    qimage, self.filename, self.frame_number)
+            )
             # go over all the tracking csv files
             # use the first matched file with video name
             # and segmentation