App: thumbnail nits

[skip ci]

Author: khemarato

scripts/gdrive_app.py

@@ -415,6 +415,20 @@ def update_visible_thumbnails(self):
                         self.thumbnail_pool.start(worker)
 
     def on_thumbnail_loaded(self, file_id: str, img: QImage):
+        # Ensure the image is padded to the full icon size to prevent label shifting
+        # and ensure the previous render is fully cleared.
+        target_size = self.file_view.iconSize().width()
+        if not img.isNull() and (img.width() != target_size or img.height() != target_size):
+            padded = QImage(target_size, target_size, QImage.Format_ARGB32)
+            padded.fill(Qt.transparent)
+            painter = QPainter(padded)
+            # Center the image
+            x = (target_size - img.width()) // 2
+            y = (target_size - img.height()) // 2
+            painter.drawImage(x, y, img)
+            painter.end()
+            img = padded
+
         pixmap = QPixmap.fromImage(img)
         self.thumbnail_cache.put(file_id, pixmap)
         if file_id in self.item_mapping:

scripts/videoutils.py

@@ -7,20 +7,20 @@ def render_video_thumbnail(video_path: Path, size=128) -> bytes:
     """Uses ffmpeg to extract a frame from a video file."""
     try:
         # We try to get a frame at 1 second in.
-        # -ss 1: seek to 1 second
+        # -ss 5: seek to 5 seconds
         # -i: input file
+        # -vf scale: resize maintaining aspect ratio
         # -vframes 1: extract 1 frame
         # -f image2pipe: output as image pipe
         # -vcodec png: encode as png
-        # -vf scale: resize maintaining aspect ratio
         cmd = [
             'ffmpeg',
-            '-ss', '1',
+            '-ss', '5',
             '-i', str(video_path),
+            '-vf', f'thumbnail,scale={size}:-1',
             '-vframes', '1',
             '-f', 'image2pipe',
             '-vcodec', 'png',
-            '-vf', f'scale={size}:-1',
             '-'
         ]
         # We use a short timeout and capture output