I had similar output as other user opening as you suggested:
log.txt:
Resolution : 1920 x 1080
Frames : 18
Frame size : 3629056 bytes
Frame skip : 1
FPS : 0.000
Processing frame 1 of 18...
App Details:
raw2dng converter GUI for OsX
Beta ver.0.11
M12-0229 File Supported
/Users/user/Downloads/raw2dng.app/Contents/Resources/script: line 31: 281 Segmentation fault "$RAW2DNG" "$FLDR$FILE_NAME".RAW >> "$LOG"
Generating jpg preview
dyld: Library not loaded: /usr/local/lib/libexiv2.10.dylib
Referenced from: /Users/user/Downloads/raw2dng.app/Contents/Resources/ufraw-batch
Reason: image not found
/Users/user/Downloads/raw2dng.app/Contents/Resources/script: line 31: 284 Trace/BPT trap "$UFRAW" --out-type=jpg --out-path=../"$FILE_NAME"_jpg *.dng >> "$LOG"
Generating avi preview
dyld: Library not loaded: /usr/local/Cellar/ffmpeg/1.1.3/lib/libavdevice.54.dylib
Referenced from: /Users/user/Downloads/raw2dng.app/Contents/Resources/ffmpeg
Reason: image not found
/Users/user/Downloads/raw2dng.app/Contents/Resources/script: line 31: 285 Trace/BPT trap "$FFMPEG" -i ../"$FILE_NAME"_jpg/%6d.jpg -vcodec mjpeg -qscale 1 ../"$FILE_NAME".avi >> "$LOG"
MY GUESS: ffmpeg dynamic library is not installed as expected or is incompatible with this version of OS (10.6.

.
I have ffmpeg working just fine on this computer - if what you are doing has cmd line equivalent - please share and I can just use ffmpeg
Otherwise please provide version with static linked library not dynamic linked.