File Extension VOB
.VOB
If you cannot open file extension .VOB, you may have a file association error or need to install the appropriate application. We recommend running the free system scan below to identify speed loss issues affecting your Operating System.Mime Type:
application/octet-stream
Related Information:
File extension VOB file format refers to a video object. This is a container format that is stored in DVD Video media. The VOB format is typically based on an MPEG 2 program stream format, but has additional private stream specifications and limitations. It comprises of the actual video, subtitle, menu and audio contents in the form of a stream. VOB files can be played on a generic MPEG 2 player. Sometimes however, for one to be able to play VOB files, one has to rename the file extension to MPG.
VOB files can also be played on Media Player Classic, VLC Media Player including other more platform specific players. It is also important to note that all VOB file extensions are MPEG 2 streams and totally comply with MPEG 2 system standard, which is ISO 13818-1. However, it is also important to note that MPEG 2 streams cannot be said to fulfill the definition of VOB files. The size of one pack is 2048 bytes.
MPEG 2 packages contain useful information used in the grouping together of elements like video and audio with variable sizes, but intended to be presented concurrently. The header of the pack may contain the timing information applied for synchronization. Each sector in the DVD video is essentially one pack and though it increases the overhead, the access to the main stream, made possible by using file extension VOB, is made easier.
Every pack starts with a header and usually contains two packets at most. The data in the pack may include navigation data, audio, video or sub-pictures. The information in one pack should all be of the same type. The navigation pack comprises of the system header, two permanent length packs that are the Data Search Information and Presentation Control Information (PCI).
The system with file extension VOB has requirements for data that is non-standard, available in form of private streams. Two types of private streams exist. However, only private stream 1 has information on timing, which is in the form of time stamps. A DVD-Video utilizes private stream 1 for sub-pictures as well as audio systems that are not necessarily MPEG. The sub-stream number determines the content of every packet. The second Private stream is used to navigate packets from the NAV packet. Real content found in private streams is determined by the DVD-Video application. A video object unit (VOBU) is a higher logical structure that has half a second of the actual program. The last video packet in every video object unit is padded with either stuffing bytes or a padding stream.
VOB files can also be played on Media Player Classic, VLC Media Player including other more platform specific players. It is also important to note that all VOB file extensions are MPEG 2 streams and totally comply with MPEG 2 system standard, which is ISO 13818-1. However, it is also important to note that MPEG 2 streams cannot be said to fulfill the definition of VOB files. The size of one pack is 2048 bytes.
Every pack starts with a header and usually contains two packets at most. The data in the pack may include navigation data, audio, video or sub-pictures. The information in one pack should all be of the same type. The navigation pack comprises of the system header, two permanent length packs that are the Data Search Information and Presentation Control Information (PCI).