mplayer doesn't play video recorded with kazam

[Muelli]

The attached video does not play with mplayer. GStreamer based applications, e.g. totem play fine.

The file was produced with kazam, the screenshot recorder

mplayer 'test.webm'

MPlayer2 2.0-728-g2c378c7-4 (C) 2000-2012 MPlayer Team
Cannot open file '/home/muelli/.mplayer/input.conf': No such file or directory
Failed to open /home/muelli/.mplayer/input.conf.
Cannot open file '/etc/mplayer/input.conf': No such file or directory
Failed to open /etc/mplayer/input.conf.

Playing /home/muelli/Videos/test.webm.

MPlayer interrupted by signal 11 in module: demux_open
- MPlayer crashed by bad usage of CPU/FPU/RAM.
  Recompile MPlayer with --enable-debug and make a 'gdb' backtrace and
  disassembly. Details in DOCS/HTML/en/bugreports_what.html#bugreports_crash.
- MPlayer crashed. This shouldn't happen.
  It can be a bug in the MPlayer code _or_ in your drivers _or_ in your
  gcc version. If you think it's MPlayer's fault, please read
  DOCS/HTML/en/bugreports.html and follow the instructions there. We can't and
  won't help unless you provide this information when reporting a possible bug.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: mplayer2 2.0-728-g2c378c7-4
ProcVersionSignature: Ubuntu 3.19.0-31.36-generic 3.19.8-ckt7
Uname: Linux 3.19.0-31-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.7
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Nov 4 15:03:44 2015
SourcePackage: mplayer2
UpgradeStatus: No upgrade log present (probably fresh install)