mythfrontend.real crashed with SIGSEGV in sws_scale()

Binary package hint: mythtv

I started watching live TV. All commands stopped working and after some minutes Mythtv crashed.

Environment: Asus M3N78-EM motherboard, 4GB RAM, AMD Phenom X810, Technisat Cablestar 2 HD DVB-C card
Ubuntu karmic (development branch), Release: 9.10

mythtv-frontend:
  Installed: 0.22.0~trunk22304-0ubuntu1
  Candidate: 0.22.0~trunk22304-0ubuntu1
  Version table:
 *** 0.22.0~trunk22304-0ubuntu1 0
        500 http://ftp.arnes.si karmic/multiverse Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
Architecture: amd64
CheckboxSubmission: 1d1b2ce607b82c4c5ca8f60ce8855d9b
CheckboxSystem: edda5d4f616ca792bf437989cb597002
CrashCounter: 1
Date: Fri Oct 9 21:34:18 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/mythfrontend.real
NonfreeKernelModules: nvidia
Package: mythtv-frontend 0.22.0~trunk22304-0ubuntu1
ProcCmdline: /usr/bin/mythfrontend.real --logfile /var/log/mythtv/mythfrontend.log
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
SegvAnalysis:
 Segfault happened at: 0x7fe21999835b: mov %r8d,(%rsi,%rax,8)
 PC (0x7fe21999835b) ok
 source "%r8d" ok
 destination "(%rsi,%rax,8)" (0x7fe1ed98cc00) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: mythtv
StacktraceTop:
 ?? () from /usr/lib/libmythswscale-0.22.so.0
 sws_scale () from /usr/lib/libmythswscale-0.22.so.0
 myth_sws_img_convert(AVPicture*, PixelFormat, AVPicture*, PixelFormat, int, int) () from /usr/lib/libmythtv-0.22.so.0
 VideoOutputXv::PrepareFrameMem(VideoFrame_*, FrameScanType) () from /usr/lib/libmythtv-0.22.so.0
 VideoOutputXv::PrepareFrame(VideoFrame_*, FrameScanType) () from /usr/lib/libmythtv-0.22.so.0
Title: mythfrontend.real crashed with SIGSEGV in sws_scale()
Uname: Linux 2.6.31-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare
XsessionErrors:
 (gnome-settings-daemon:2513): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:2513): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:2570): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:2547): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (gnome-panel:2535): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -1 and height 24