File Extension Library


.263 File Extension

  • Developer by: VideoLAN Project Team
  • Category: Digital video and movie Files

What is an .263 file?

.263 file extension is created by VideoLAN Project Team. .263 has been classified as Digital video and movie Files.

.263 is 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.

.263 file format is deprecated and this file format is no longer supported.

Currently, .263 file type is not actively used and is obsolete. This usually happens with system files in older operating systems, files from long-discontinued software, or with previous versions of some file types (documents, projects, images, etc.) that were replaced in later versions of the original programs.


How to open:

Use compatible tools to playback *.263 files.

How to convert:

Probably can be exported to other video formats.

How to Open .263 file on different platforms

Open .263 File on Windows

  • Right-click a .263
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .263 file and Select check box "Always use this app to open .263 files" Press "Ok"

Open .263 File on Mac

  • Right-click (or Ctrl + Left-click) the .263 file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .263 File on Linux

Right click on the .263 file, choose "Open with" and select a program from the list above

Open .263 File on iPhone

Select a file. If you don't see an application to open the .263 file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .263 File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .263 files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .263 files

  1. You need to update the application that you normally use to open .263 files. Only the latest version of the software supports the current .263 file format
  2. You need to check the .263 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)