Comment 2 for bug 1203307

StacktraceTop:
 avio_close (s=0x0) at /build/buildd/libav-0.8.6/libavformat/aviobuf.c:989
 wxFfmpegMediaEncoder::CloseEncoder (this=0x7fffbf2d5a80) at mediaenc_ffmpeg.cpp:437
 wxFfmpegMediaEncoder::~wxFfmpegMediaEncoder (this=0x7fffbf2d5a80, __in_chrg=<optimized out>) at mediaenc_ffmpeg.cpp:47
 ProgressDlg::GenerateMenu (this=this@entry=0x7fffbf2d5f10, menu=0x1020b50, widescreenType=wtNOPANSCAN, menuFile=..., audioFormat=afAC3, audioFile=..., videoBitrate=6076) at ProgressDlg.cpp:1513
 ProgressDlg::GenerateMenus (this=this@entry=0x7fffbf2d5f10, menuVobs=..., menuWSTypes=..., menuSubSteps=menuSubSteps@entry=250, dvd=dvd@entry=0x103bb70) at ProgressDlg.cpp:717