[FFmpeg-user] parser not found for codec dvb_teletext

[jon h]

When transcoding programs recorded off DVB-T (Australia),
I'd like to get the 'closed caption' subtitles,
for a friend who has poor hearing.

Using Zeranoe build 20121029, win 32-bit shared:--

input messages contain:
Stream #0:2[0x240](eng): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
[mpegts @ 00f04980] parser not found for codec dvb_teletext, packets or
times may be invalid.

output messages contain:
Stream #0:2 -> #0:2 (? -> ass)
Decoder (codec dvb_teletext) not found for input stream #0:2

Google didn't find anything relevant;
seems like nobody wants captions off DVB!

Is the cause simple, like maybe dvb_teletext was not enabled in the build ?

build details:
ffmpeg version N-46146-g11d695d Copyright (c) 2000-2012 the FFmpeg
developers
  built on Oct 29 2012 18:08:23 with gcc 4.7.2 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl
--enable-version3 --disable-pthreads --enable-runtime-cpudetect
--enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype
--enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger
--enable-libspeex --enable-libtheora --enable-libutvideo
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
--enable-zlib

Thanks in advance
jon