Use only keyframes when thumbnailing

lazy_player/thumbnailer.py

@@ -9,7 +9,14 @@ from gi.repository import GLib, Gst
 if TYPE_CHECKING:
     from .file_model import FileItem
 
-DEFAULT_SEEK_FLAGS = Gst.SeekFlags.FLUSH | Gst.SeekFlags.KEY_UNIT
+DEFAULT_SEEK_FLAGS = (
+    Gst.SeekFlags.FLUSH
+    | Gst.SeekFlags.KEY_UNIT
+    | Gst.SeekFlags.SNAP_NEAREST
+    | Gst.SeekFlags.TRICKMODE
+    | Gst.SeekFlags.TRICKMODE_KEY_UNITS
+    | Gst.SeekFlags.TRICKMODE_NO_AUDIO
+)
 
 
 class Thumbnailer(threading.Thread):
@@ -64,7 +71,7 @@ class Thumbnailer(threading.Thread):
             "uridecodebin name=uridecodebin ! "
             "videoconvert ! "
             "jpegenc quality=85 ! "
-            "appsink name=sink"
+            "appsink sync=false name=sink"
         )
 
         pipeline = Gst.parse_launch(pipeline_str)