VOB to MPA: Extract Audio from VOB(DVD Media File) Video to MPA(MPEG Audio) with River Past Audio Converter, VOB2MPA converter, conversion
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,
subpictures, and button navigation commands.
To decode DVD-VIDEO, you will need both GPL
MPEG-2 Decoder, and AC-3
There are three "layers" in the MPEG-1
In MPEG Audio Layer-1, a simple 32-subband audio compressor using a floating
point representation for subband samples. Resolution and scale factor are stored
for groups of 12 subsamples. MP1 is only used for Philips DCC Digital Compact
cassette with data rates of 384 kbps.
Both MPEG-1 and MPEG-2 files use MPEG-1
MPEG-1 Audio Layer-3 becomes
the widely popular MP3.
MPEG.ORG is an excellent source for additional
information on MPEG format and usage.
To encode MPEG Audio, you will need River
Past MPEG-2 Booster Pack in addition to your audio software.
To extract audio from VOB(DVD Media File) video to MPA(MPEG Audio) with River Past Audio Converter, you must have River Past MPEG-2 Booster Pack installed.
Launch River Past Audio Converter
Once River Past Audio Converter is installed properly, launch Audio Converter.
To decode DVD, you need to have a couple of free decoders installed.
The first one is GPL MPEG Decoder.
GPL MPEG Decoder
Next, install AC-3 Decoder Filter.
AC-3 Decoder Filter
Add VOB File
Click on the "Add Files" button on the tool bar. The standard file open dialog appears. Select "VOB - DVD Media(*.vob)" in its "Files of type" combo box.
You should only use "Add Files" to select VOB files if they are generated by a DVD authoring software and each VOB file represent a single video clip. Do not use "Add Files" to add the VOB files on a DVD disc or DVD image.
A DVD contains many video clips, which are then divided into cells/chapters. All of the video clips are then streamed together in one big block. The VOB files on the disc is just a way to divide the block into 1GB files to be compatible with older operation systems like Windows 95, who has a file size limit.
Each VOB file on the DVD may contain multiple videos. Each video may span over multiple VOB files. If you use "Add Files", only the first clip in that particular VOB file will be parsed and added.
This picture below makes it easier to understand.
In this case, if you use "Add Files" to add VTS_01_1.VOB, you will only get the still menu. If you use "Add Files" to add VTS_01_2.VOB, you will get the end of chapter 3... This is how file based decoding works.
If you want to convert from a DVD disc or DVD VIDEO_TS directory image, use "Add DVD". We will parse the DVD information and find all the cell breaks. You will get to select which cell to convert, from 2 to 5. Still menus are ignored.
River Past Audio Converter
Select Output Format
Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "MPA - MPEG Layer-2" as the "Audio Type".
You can change the sample rate, channel (stereo or mono) and bits/sample, and bitrate.
Note: The MPEG-2 Booster Pack must be installed for the "MPA - MPEG Layer-2" output option to show.
Select output directory
Expand the "Output Directory" panel. Use the "Browse" button to select an output directory.
Click the "Convert" button on the tool bar.
River Past Audio Converter