What is MIME type "video/h263"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

video/h263 denotes video data encoded with the H.263 compression algorithm.
This MIME type tells software that the video stream uses H.263 decoding, which is essential for proper playback.

Low-Bandwidth Streaming: The H.263 codec compresses video efficiently, making it ideal for environments where network resources are limited.
Videoconferencing: It has been used in real-time communication systems and mobile video applications.
Legacy Support: Although newer codecs are more common today, some older systems and files still use the H.263 standard.

Files marked with this MIME type often carry the file identifier H263.
For more on how MIME types define data handling, refer to the IANA Media Types.

Associated file extensions

.h263

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: video/h263

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="video/h263">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'video/h263');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.h263

FAQs

Do modern web browsers support video/h263?

No, most modern browsers do not natively support video/h263 in HTML5 <video> tags. This is a legacy format primarily used for older videoconferencing and mobile video. For web compatibility, you should convert these files to video/mp4 (H.264) or video/webm.

How do I configure Apache or Nginx to serve H.263 files?

To ensure browsers download the file correctly, you must define the MIME type in your server config. For Apache, add AddType video/h263 .h263 to your .htaccess file. For Nginx, ensure your mime.types file includes the line video/h263 h263;.

What is the difference between H.263 and H.264?

H.263 is an older compression standard designed for low-bitrate videoconferencing (like on early 3G phones), whereas H.264 offers significantly better video quality at the same file size. H.264 is the current industry standard for web streaming, while H.263 is largely obsolete.

Which file extensions are associated with video/h263?

The specific extension for raw H.263 streams is usually .h263. However, H.263 video streams are often found wrapped inside container formats like .3gp (3GPP) or .mov, which may use different MIME types depending on the container.

How can I convert a video/h263 file to MP4?

You can use the command-line tool FFmpeg to convert legacy H.263 files to modern formats. A common command is ffmpeg -i input.h263 -c:v libx264 -c:a aac output.mp4, which encodes the video to H.264 and audio to AAC.

Why won't my media player open a .h263 file?

Default system media players (like Windows Media Player or QuickTime) often lack the specific codec required to decode video/h263. To play these files, use a versatile third-party player like VLC Media Player or install a codec pack that supports legacy standards.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.