Media Player DVD Movie Music CD - Demuxing (Demultiplexing) Data Streams in Movie VOB Files

The next test I did was to demux (demultiplex) an audio or video stream from a movie VOB file with vStrip using 4 command options.
"-d": Turn on the demux mode.
"-oFile": Save output to a file.
"-!": Strip everything.
"0xnn": Hex value of a stream ID.
1. Run vStrip command to demux the video stream out of the sample VOB file:
2. Test the video stream file, which is in MPG (MPEG) format, with MPlayer. It plays well. But of course, there is no sound.
3. Run vStrip command to demux an audio stream out of the sample VOB file with the stream ID of 0xBD and the sub stream ID of 0x80:
4. Try to play the audio file with MPlayer. But MPlayer fails to detect the file format.