VRO is the format used by DVD recorders for video recording. It is slightly different from standard DVD-VIDEO format, which is used for movies. However, it also uses MPEG-2 encoding.
To convert from VRO files, you will need to install both GPL MPEG-2 Decoder, and AC-3 Decoder Filter.
VOB standards for "Video Object". It is the file type to store video on a DVD disc. It is actuallly a MPEG-2 video, with special extension to support PCM, AC3, DTS audio, subpictures, and button navigation commands.
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