<html style="direction: ltr;">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<style type="text/css">body p { margin-bottom: 0cm; margin-top: 0pt; } </style>
<style type="text/css">body p { margin-bottom: 0cm; margin-top: 0pt; } </style>
</head>
<body style="direction: ltr;" bidimailui-charset-is-forced="true"
bgcolor="#FFFFFF" text="#000000">
I use Qt, and setting QWidget::autoFillBackground helps - but only
while the video is not playing and its first frame is static and
visible, and for about one second once playing starts.
<p>After one second of play the blank spaces return and become
see-through.<br>
</p>
</body>
</html>