QGraphicsVideoItem 加载视频背景，在上层加载图片及其他item

[{"title":"（ 11 个子文件 19.72MB ） QGraphicsVideoItem 加载视频背景，在上层加载图片及其他item","children":[{"title":"Demo20231011","children":[{"title":"mainwindow.h <span style='color:#111;'> 217B </span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'> 2.10KB </span>","children":null,"spread":false},{"title":"README.txt <span style='color:#111;'> 36B </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 956B </span>","children":null,"spread":false},{"title":"bin","children":[{"title":"Demo.exe <span style='color:#111;'> 44.00KB </span>","children":null,"spread":false},{"title":"product","children":[{"title":"image","children":[{"title":"NormalTarget.png <span style='color:#111;'> 61.86KB </span>","children":null,"spread":false}],"spread":true},{"title":"video","children":[{"title":"test4.mp4 <span style='color:#111;'> 5.01MB </span>","children":null,"spread":false},{"title":"test2.mkv <span style='color:#111;'> 5.00MB </span>","children":null,"spread":false},{"title":"test3.flv <span style='color:#111;'> 5.00MB </span>","children":null,"spread":false},{"title":"test1.mp4 <span style='color:#111;'> 5.02MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true},{"title":"Demo.pro <span style='color:#111;'> 1008B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]