Fix for jeertmans#293 and similar errors

This commit fixes the screen going black after the video ends in versions of PySide6 v6.5.3 and newer. This allows for other errors (like jeertmans#315) that require a newer version of PySide6 to also be fixed.

manim_slides/present/player.py

@@ -4,7 +4,7 @@
 
 from qtpy.QtCore import Qt, QTimer, QUrl, Signal, Slot
 from qtpy.QtGui import QCloseEvent, QIcon, QKeyEvent, QScreen
-from qtpy.QtMultimedia import QAudioOutput, QMediaPlayer
+from qtpy.QtMultimedia import QAudioOutput, QMediaPlayer, QVideoFrame
 from qtpy.QtMultimediaWidgets import QVideoWidget
 from qtpy.QtWidgets import (
     QHBoxLayout,
@@ -240,6 +240,18 @@ def __init__(
         self.presentation_changed.connect(self.presentation_changed_callback)
         self.slide_changed.connect(self.slide_changed_callback)
 
+        old_frame = None
+
+        def frame_changed(frame: QVideoFrame) -> None:
+            nonlocal old_frame
+
+            if old_frame and (frame.size() != old_frame.size()):
+                self.video_sink.setVideoFrame(old_frame)
+                frame = old_frame
+
+            self.info.video_sink.setVideoFrame(frame)
+            old_frame = frame
+
         self.info = Info(
             full_screen=full_screen,
             aspect_ratio_mode=aspect_ratio_mode,
@@ -248,7 +260,7 @@ def __init__(
         self.info.close_event.connect(self.closeEvent)
         self.info.key_press_event.connect(self.keyPressEvent)
         self.video_sink.videoFrameChanged.connect(
-            lambda frame: self.info.video_sink.setVideoFrame(frame)
+            frame_changed
         )
         self.hide_info_window = hide_info_window
 

pyproject.toml

@@ -62,7 +62,7 @@ manim = ["manim>=0.18.0"]
 manimgl = ["manimgl>=1.6.1;python_version<'3.12'"]
 pyqt6 = ["pyqt6>=6.6.1"]
 pyqt6-full = ["manim-slides[full,pyqt6]"]
-pyside6 = ["pyside6>=6.5.1,<6.5.3;python_version<'3.12'", "pyside6>=6.6.1;python_version>='3.12'"]
+pyside6 = ["pyside6>=6.6.1"]
 pyside6-full = ["manim-slides[full,pyside6]"]
 sphinx-directive = ["docutils>=0.20.1", "manim-slides[manim]"]
 tests = [