Okay. I have entered your command with a title and the optical drive (trying title 1 first):
Code:
mplayer -nocache -alang en -dumpaudio -dumpfile audiofile.ac3 dvdnav://1///dev/sr1
The output is:
Code:
Warning unknown option stopxscreensaver at line 5
MPlayer svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing dvdnav://1///dev/sr1.
libdvdnav: Using dvdnav version 4.2.0
libdvdread: Encrypted DVD support unavailable.
************************************************
** **
** No css library available. See **
** /usr/share/doc/libdvdread4/README.css **
** for more information. **
** **
************************************************
libdvdnav: DVD Title: 2013_08_04_AM
libdvdnav: DVD Serial Number: 49ED2421APPLEDSP
libdvdnav: DVD Title (Alternative): 2013_08_04_AM
libdvdnav: Unable to find map file '/home/demo/.dvdnav/2013_08_04_AM.map'
libdvdnav: DVD disk reports itself with Region mask 0x00400000. Regions: 1 2 3 4 5 6 8
audio stream: 0 format: lpcm (stereo) language: aid: 160.
INIT ERROR: couldn't get init pos New position not yet determined.
Remember to disable MPlayer's cache when playing dvdnav:// streams (adding -nocache to your command line)
DVDNAV, switched to title: 1
audio stream: 0 format: lpcm (stereo) language: aid: 160.
MPEG-PS file format detected.
dump: 985849688 bytes written (~99.8%)
DVDNAV, switched to title: 1
audio stream: 0 format: ac3 (mono) language: unknown aid: 128.
audio stream: 1 format: ac3 (mono) language: unknown aid: 129.
audio stream: 2 format: ac3 (mono) language: unknown aid: 130.
audio stream: 3 format: ac3 (mono) language: unknown aid: 131.
audio stream: 4 format: ac3 (mono) language: unknown aid: 132.
audio stream: 5 format: ac3 (mono) language: unknown aid: 133.
audio stream: 6 format: ac3 (mono) language: unknown aid: 134.
audio stream: 7 format: ac3 (mono) language: unknown aid: 135.
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
subtitle ( sid ): 0 language: unknown
dump: 987527040 bytes written to 'audiofile.ac3'.
Core dumped ;)
Exiting... (End of file)
So it has made an audiofile.ac3. I opened it with mplayer to listen, and it's playing, but I hear nothing, even with earbuds (in case the volume is simply very low). I suppose that could mean I ripped the wrong title, but Mplayer says the audiofile is about 55 minutes long, so I obviously didn't get a title containing only the menu loop, right?
You said it's commercial DVDs that use .ac3 and my church may well have used a different format, so perhaps that's the problem? Is there any way I can determine myself what recording format was used, or do I just have to ask the technicians? I note that the output says "format: lpcm (stereo)"; doesn't that mean "lpcm" is the format I should rip in? (It also says "MPEG-PS file format detected," but MPEG is the video's format, isn't it?) Lpcm seems obvious, so I'll try ripping in it.