I'm trying to convert an OGM file to XviD AVI with hardcoded subs. This is what I get from Mencoder:

success: format: 0 data: 0x0 - 0xaa14c5a
[Ogg] stream 0: video (FOURCC DX50), -vid 0
[Ogg] stream 1: audio (Vorbis), -aid 0
[Ogg] stream 2: audio (Vorbis), -aid 1
[Ogg] stream 3: subtitles (SRT-like text subtitles), -sid 0
[Ogg] Language for -sid 0 is '-slang "English"'
Demuxer info Language changed to English
Ogg file format detected.

I tried to specify -sid 0 in the encoding command line, but no subtitles show up in the encoded video. Using -aid 1 works and selects the right audio track I want. So what should I do?