# Interlacing Problems with Embedded Videos in Okular

I have a Dell Precision 5510 Laptop and I am having improper interlacing (horizontal lines) on the embedded videos in okular. Has anyone faced this problem before?

I am using the multimedia package. Here is a part-segment from my code.

\documentclass{beamer}
%% Preamble
\usepackage{multimedia}

%% in
\begin{document}
\begin{frame}[t]
\frametitle{Introduction}

\movie[height = 0.55\textwidth, width = 1\textwidth, poster, showcontrols]{\includegraphics[height=5cm]{videos/math.png}}{videos/math.mp4}
\end{frame}
\end{document}


Laptop details: Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz Intel HD Graphics. OS: Ubuntu 14.04 Okular version: 0.19.3

I am attaching two snapshots, one, where interlacing occurs (check right person)

,

and the other where the video still does not vanish and comes in the way of the next slide

.

• In the MWE shouldn't the document class be beamer and \begin{document} on a new line (uncommented)? Without the actual movie you use or at least some data about it, it's hard to tell. On ubuntu 16.04 and okular 0.24.2 I tested some full hd movies I have around and there were no issues. The hardware specs are more than enough, no worries here. – alwaysask Jun 30 '16 at 20:03
• I re-edited the question. I think the bot edited the question wrongly. I have tried with all videos, the horizontal lines are seen. If I use the externalviewer option, I dont see it happen. I am sure it has to do with the display drivers in my laptop. I don't get this problem in my desktop computer. Ubuntu, okular, beamer versions are all the same. – Shishir Jun 30 '16 at 21:51
• I still have ubuntu 14.04 on another partition so I tried the pdf with okular 0.19.3. It complained about missing codecs and this is what can be wrong on your laptop: wrong/buggy/old/unappropriate codecs that mess up the interlacing. Display driver is fine, don't worry about it. – alwaysask Jul 1 '16 at 7:59
• I just realized that this occurs when running in vlc also. I guess it is a codec problem. It works fine in mplayer. Now I am stuck with solving the interlacing problem of vlc player!! – Shishir Jul 1 '16 at 18:09