vob to mp4 help?

[jfish666]

not sure if what i'm getting is the same thing as the posts i've been reading. i'm getting .mp4 files that are 0KB.
what exactly does the "codec type mismatch for mapping" mean?

Encoding started on Sun Feb 22 13:59:05 PST 2009
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
Input #0, mpeg, from '/Users/jfish/MacTheRipper/Incoming/ThereWillBeBlood.VOB':
Duration: 01:27:09.4, start: 0.205367, bitrate: 11957 kb/s
Stream #0.0[0x1e0], 29.97 fps(r): Video: mpeg2video, yuv420p, 720x480, 9800 kb/s
Stream #0.1[0x20]: Subtitle: dvdsub
Stream #0.2[0x21]: Subtitle: dvdsub
Stream #0.3[0x22]: Subtitle: dvdsub
Stream #0.4[0x23]: Subtitle: dvdsub
Stream #0.5[0x24]: Subtitle: dvdsub
Stream #0.6[0x25]: Subtitle: dvdsub
Stream #0.7[0x26]: Subtitle: dvdsub
Stream #0.8[0x27]: Subtitle: dvdsub
Stream #0.9[0x28]: Subtitle: dvdsub
Stream #0.10[0x29]: Subtitle: dvdsub
Stream #0.11[0x80]: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Stream #0.12[0x81]: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Stream #0.13[0x82]: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Codec type mismatch for mapping #0.1 -> #0.1

[Case]

not sure if what i'm getting is the same thing as the posts i've been reading.

Maybe not. Many other posts concerning this error message deal with movies that have two streams: 1 video + 1 audio. Your source file (VOB) has many streams, including subtitle streams. Just inverting the stream mapping won't help you with this file.

what exactly does the "codec type mismatch for mapping" mean?

It means that it fails to "map" each stream to be converted to the correct codec type, that is: it should be video -> video and audio -> audio. But with your file, it tries to convert a subtitle stream (input stream #0.1) to audio (output stream #0.1), which of course won't work.

Try using a mencoder preset, which doesn't depend on stream mapping.
Or re-rip the DVD to include just one video stream, one audio stream, and no other streams.