Brought some DVD ISOs into the Mezzmo library.
Went to play one on the SONY Bravia and it displayed "Video file cannot be played".
In the library, did right-click Properties, Gapless Multi-File tab. All five vob entries each showed 0 duration.
Right-click FFmpeg Info, showed the info at the end of this post.
When I mount the ISO in the file system (Virtual CloneDrive), the movie plays just fine.

What could be wrong?

ffmpeg version N-46003-gfa48da1 Copyright (c) 2000-2012 the FFmpeg developers
built on Oct 25 2012 12:37:27 with gcc 4.6.2 (GCC)
configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/home/peter/ffmpeg/build/gpl --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc/include --extra-ldflags=-L/home/peter/cc/lib --pkg-config=pkg-config --disable-w32threads --enable-zlib
libavutil 52. 0.100 / 52. 0.100
libavcodec 54. 69.100 / 54. 69.100
libavformat 54. 34.100 / 54. 34.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 20.105 / 3. 20.105
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
pipe:: Invalid data found when processing input

<MEZZMO>: Child process ended with code: 109, ExitCode=1


---> DB Level Info: 8, 4
---> Frame rate: 30.17
---> Aspect ratio: 16:9