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Basic information about 263 file

When there is a problem with opening files with the file extension 263（*.263 or *.263）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the 263 file yourself.

There are 1 file types using the 263 file extension in our database. In the further part of this page, you will find detail information about all the 263 file with their brief description and a list of programs that support 263 file sorted by operating systems. The table below provides useful information about the 263 file extension. It answers questions such as:
  • What is the 263 file?
  • How to open a 263 file?
  • What programs do I need to open a 263 file?
  • What programs help to create and edit a 263 file?
  • How to convert 263 files to another file format?
  • How to convert another files to 263 file format?


1.Detail information about 263 file extension: H.263 Encoded Video

File type H.263 Encoded Video Category Video Files
Developer N/A File format N/A
Description 263 file is a H.263 Encoded Video. The 263 file extension is associated with H.263 is a provisional ITU-T standard, it is due to be published sometime in 1995/1996. It was designed for low bitrate communication, early drafts specified datarates less than 64 Kbits/s, however this limitation has now been removed. It is expected that the standard will be used for a wide range of bitrates, not just low bitrate applications. It is expected that H.263 will replace H.261 in many applications.

The coding algorithm of H.263 is similar to that used by H.261, however with some improvements and changes to improve performance and error recovery. The differences between the H.261 and H.263 coding algorithms are listed below. Half pixel precision is used for motion compensation whereas H.261 used full pixel precision and a loop filter. Some parts of the hierarchical structure of the datastream are now optional, so the codec can be configured for a lower datarate or better error recovery. There are now four optional negotiable options included to improve performance: Unrestricted Motion Vectors, Syntax-based arithmetic coding, Advance prediction, and forward and backward frame prediction similar to MPEG called P-B frames.

H.263 supports five resolutions. In addition to QCIF and CIF that were supported by H.261 there is SQCIF, 4CIF, and 16CIF. SQCIF is approximately half the resolution of QCIF. 4CIF and 16CIF are 4 and 16 times the resolution of CIF respectively. The support of 4CIF and 16CIF means the codec could then compete with other higher bitrate video coding standards such as the MPEG standards.

This 263 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
Software programs that will open, edit or convert 263 files

Windows		 VLC media player

macOS		 VLC media player for Mac

Linux		 VLC media player for Linux



Can't open a 263 file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.263”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the 263 extension without any issue.


Where I can download the application that support 263 file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of 263 files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a 263 file?

The reasons for the lack of the ability to open a 263 file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a 263 file. If there is still something wrong, you might want to check:

  • Whether the 263 file is damaged.
  • Whether the 263 file is incorrectly linked in the registry entries.
  • Whether the 263 file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the 263 file format is incompletely.
  • Whether the 263 file is infected.
  • Whether the drivers of the equipment used for opening a 263 file are up to date.
  • Whether your computer has enough hardware resources to open a 263 file.

If the 263 file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.