<!DOCTYPE HTML> <html> <body style="background:white;"> <!-- Test if video displays correctly with a 3:2 aspect ratio. It should display at w=150 h=100. On some Linux systems, the scaling to preserve the aspect ratio can sample the pixels outside visible region. This results in a thin grey line down some sides of the scaled picture. We add red bars over the edges to overwrite such happenings, to make the test reliable. --> <video src="black100x100-aspect3to2.webm" style="position:absolute; left: 10px; top: 10px; z-index: 1;"> </video> <!-- Left side vertical. --> <div style="position: absolute; left: 9px; top: 9px; width: 2px; height: 102px; z-index: 2; background: red;"></div> <!-- Right side vertical. --> <div style="position: absolute; left: 159px; top: 9px; width: 2px; height: 102px; z-index: 2; background: red;"></div> <!-- Top horizontal bar. --> <div style="position: absolute; left: 9px; top: 9px; width: 152px; height: 2px; z-index: 2; background: red;"></div> <!-- Bottom horizontal bar. --> <div style="position: absolute; left: 9px; top: 109px; width: 152px; height: 2px; z-index: 2; background: red;"></div> </body> </html>