[dvd::rip] WARNING: no IFO files found - vobsub feature disabled.

["David G. Miller" <dave@xxxxxxxxxxxxx>]

I'm new to dvdrip and I'm attempting to make a backup copy of one of my 
DVDs.  I'd like to maintain the DVD capability of being able to turn 
subtitles on or off.  After a number of different attempts with either 
the DVD as a file set or as an ISO image I keep getting the subject 
message.  The pertinent log file looks like:

...
Wed Feb 21 21:10:08 2007 Executing command: execflow tcprobe -H 10 -i 
/mnt/loop -T 11 && echo EXECFLOW_OK; execflow dvdxchap -t 11 /mnt/loop 
2>/dev/null
Wed Feb 21 21:10:08 2007 Job 'Probe - title #10' finished
Wed Feb 21 21:10:08 2007 Not enabling PSU core, because this movie has 
only one PSU.
Wed Feb 21 21:10:08 2007 Successfully probed title #11
Wed Feb 21 21:10:08 2007 Successfully read DVD TOC
Wed Feb 21 21:10:08 2007 WARNING: no IFO files found - vobsub feature 
disabled.
Wed Feb 21 21:10:08 2007 Copying IFO files from {src_dir} to 
/opt/video/dvdrip-data/TR2/tmp/ifo
Wed Feb 21 21:10:08 2007 Job 'Read TOC (lsdvd|tcprobe)' finished
Wed Feb 21 21:10:09 2007 Job 'Read TOC (tcprobe)' finished
Wed Feb 21 21:10:09 2007 Job 'Probe all DVD titles' finished
Wed Feb 21 21:10:09 2007 Job 'Probe - title #11' finished
...

The weird thing is that the subtitles get extracted as .png files and I 
can render the subtitles into the copied movie.  Why am I unable to 
create a vobsub file?  The message regarding copying .IFO files 
immediately after the warning is also strange since nothing ever shows 
up in the ifo directory.

I'm running the current version of dvdrip as installed from the dries 
repo under FC6.  FC6 is current.  The VIDEO_TS directory for the DVD has 
a bunch of .IFO files and, as noted earlier, I'm able to extract the 
strings and then render the strings into the output.

Any advice would be appreciated.  If there is a need for additional 
information (e.g., run something from the command line with additional 
debug), please let me know.

Thanks,
Dave

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