[MEncoder-users] [PATCH] Segfault when encoding from mkv file

[Evgeniy Stepanov]

On Thursday 07 June 2007, Dominique Dumont wrote:
> Hello
>
> Mencoder seg faults when encoding from a mkv file (without embedded
> subtitles):
>
>
> Core was generated by `./mencoder Test.mkv -oac copy -vf
> scale=1280:534,crop=128          0:528:0:3 -ovc x264 -x'. Program
> terminated with signal 11, Segmentation fault.
> #0  ass_add_font (priv=0x0, name=0xf744e0 "TCCEB.TTF", data=0xf74530 "",
>     size=74708) at ass_library.c:87
> 87              grow_array((void**)&priv->fontdata, priv->num_fontdata,
> sizeof(*          priv->fontdata)); (gdb) bt
> #0  ass_add_font (priv=0x0, name=0xf744e0 "TCCEB.TTF", data=0xf74530 "",
>     size=74708) at ass_library.c:87
> #1  0x00000000004d8bee in demux_mkv_open (demuxer=0xf6b190) at
> demux_mkv.c:1539 #2  0x00000000004c27d6 in demux_open_stream
> (stream=0xf6a7d0, file_format=0, force=0, audio_id=-1, video_id=-1,
> dvdsub_id=-2,
>     filename=0xf487b0 "Test.mkv") at demuxer.c:722
> #3  0x00000000004c2cf5 in demux_open (vs=0xf6a7d0, file_format=16205024,
>     audio_id=74708, video_id=-1, dvdsub_id=1, filename=0xf487b0 "Test.mkv")
>     at demuxer.c:867
> #4  0x0000000000437dfa in main (argc=<value optimized out>,
>     argv=<value optimized out>) at mencoder.c:590
> (gdb)
>
> From why I've understood, the global ass_library (priv in add_ass_font)
> is null.
>
> It's probably normal not to care about ass subtitles (or any
> subtitles) while encoding, but demux_mkv_open should check ass_library
> before calling ass_add_font.
>
> Here's a small patch for this.
>
> Encoding starts normally with this patch.

Thanks, patch applied.