MPEG-4 - Revision history

Dan Tobias at 05:08, 26 May 2021

2021-05-26T05:08:53Z

Dan Tobias at 15:10, 7 June 2014

2014-06-07T15:10:58Z

Jsummers at 13:50, 1 June 2014

2014-06-01T13:50:09Z

Dan Tobias: /* Links */

2014-05-27T01:56:31Z

‎Links

Jsummers: Add category

2014-04-13T16:04:33Z

Add category

Jsummers at 13:40, 5 April 2014

2014-04-05T13:40:05Z

Jsummers at 00:38, 4 April 2014

2014-04-04T00:38:58Z

Jsummers at 23:36, 3 April 2014

2014-04-03T23:36:17Z

Jsummers: Jsummers moved page MP4 to MPEG-4: Splitting MP4 into separate MPEG-4 and MP4 articles

2014-04-03T23:27:16Z

Jsummers moved page MP4 to MPEG-4: Splitting MP4 into separate MPEG-4 and MP4 articles

Dan Tobias at 01:23, 10 February 2014

2014-02-10T01:23:16Z

@@ Line 4: / Line 4: @@
 |subcat2=MPEG
 |thiscat=MPEG-4
-|extensions={{ext|mp4}}, others
+|extensions={{ext|mp4}}, {{ext|m4a}}, {{ext|m4b}}, {{ext|m4p}}, {{ext|m4r}}, {{ext|aac}}
 }}
 [[MPEG-4]] is an expansive collection of standards related to a set of multimedia formats. It is developed by the Moving Picture Experts Group, codified as ISO/IEC 14496. Saying just what the "MPEG-4 file format" is, is a somewhat complicated question. Parts 12, 14, and 15 specifically refer to "file formats".
@@ Line 20: / Line 20: @@
 Part 22: Refer to [[Open Font Format]].
-"MP4 audio players" don't always support the MPEG-4 file formats, sometimes supporting only the AAC audio encoding from MPEG-4, Part 3 (aka MPEG-4 Audio). These would more properly be called AAC files, with the extension ".aac".
+"MP4 audio players" don't always support the MPEG-4 file formats, sometimes supporting only the AAC audio encoding from MPEG-4, Part 3 (aka MPEG-4 Audio). These would more properly be called [[AAC]] files, with the extension ".aac".
 MPEG-4 is encumbered by numerous patents, and (at least) commercial implementers have to secure licenses. Many of the licensing aspects are handled by a group called MPEG LA.

@@ Line 2: / Line 2: @@
 |formattype=electronic
 |subcat=Video
 |thiscat=MPEG-4
 |extensions={{ext|mp4}}, others

@@ Line 3: / Line 3: @@
 |subcat=Video
 |thiscat=MPEG-4
-|extensions={{ext|mp4}}, {{ext|aac}}, others
+|extensions={{ext|mp4}}, others
 }}
 [[MPEG-4]] is an expansive collection of standards related to a set of multimedia formats. It is developed by the Moving Picture Experts Group, codified as ISO/IEC 14496. Saying just what the "MPEG-4 file format" is, is a somewhat complicated question. Parts 12, 14, and 15 specifically refer to "file formats".
-Part 3 defines compressed audio formats, including [[MPEG-4 ALS|ALS]] and [[MPEG-4 SLS|SLS]].
+Part 3 defines compressed audio formats, including [[AAC]], [[MPEG-4 ALS|ALS]], and [[MPEG-4 SLS|SLS]].
 Part 10: Refer to [[H.264]].
@@ Line 27: / Line 27: @@
 * [http://www.mp4ra.org/ MP4 Registration Authority]
 * RFC 4337: MPEG-4 MIME type registration
 [[Category:Audio and Music]]

@@ Line 27: / Line 27: @@
 * [http://www.mp4ra.org/ MP4 Registration Authority]
 * RFC 4337: MPEG-4 MIME type registration
 [[Category:Audio and Music]]

← Older revision		Revision as of 16:04, 13 April 2014
Line 27:		Line 27:
	* [http://www.mp4ra.org/ MP4 Registration Authority]		* [http://www.mp4ra.org/ MP4 Registration Authority]
	* RFC 4337: MPEG-4 MIME type registration		* RFC 4337: MPEG-4 MIME type registration
		+
		+	[[Category:Audio and Music]]

@@ Line 7: / Line 7: @@
 [[MPEG-4]] is an expansive collection of standards related to a set of multimedia formats. It is developed by the Moving Picture Experts Group, codified as ISO/IEC 14496. Saying just what the "MPEG-4 file format" is, is a somewhat complicated question. Parts 12, 14, and 15 specifically refer to "file formats".
-Part 12 is known as [[ISO Base Media File Format]]. It is derived largely from Apple's QuickTime format and is described as a "general format for timed sequences of media data."
+Part 10: Refer to [[H.264]].
 Part 14: Refer to [[MP4]].
 Part 15 is "MPEG-4 File Format for Advanced Video Coding." This specifies the use of Part 10 encoding with the Part 12 file format. the extension ".avc" is often used with it.
 "MP4 audio players" don't always support the MPEG-4 file formats, sometimes supporting only the AAC audio encoding from MPEG-4, Part 3 (aka MPEG-4 Audio). These would more properly be called AAC files, with the extension ".aac".

@@ Line 2: / Line 2: @@
 |formattype=electronic
 |subcat=Video
-|extensions={{ext|mp4}}, {{ext|m4a}}, {{ext|m4p}}, {{ext|m4b}}, {{ext|m4r}}, {{ext|m4v}}, {{ext|avc}}, {{ext|aac}}
+|thiscat=MPEG-4
-|mimetypes={{mimetype|audio/mp4}}, {{mimetype|video/mp4}}
+|extensions={{ext|mp4}}, {{ext|avc}}, {{ext|aac}}, others
 }}
-'''MP4''' is the popular name for the MPEG-4 standard, defined by the Moving Picture Experts Group, codified as ISO/IEC 14496. Saying just what the "MP4 file format" is, is a somewhat complicated question. Parts 12, 14, and 15 specifically refer to "file formats.".
+[[MPEG-4]] is an expansive collection of standards related to a set of multimedia formats. It is developed by the Moving Picture Experts Group, codified as ISO/IEC 14496. Saying just what the "MPEG-4 file format" is, is a somewhat complicated question. Parts 12, 14, and 15 specifically refer to "file formats".
-Part 12 is known as ISO Base Media File Format. It is derived largely from Apple's QuickTime format and is described as a "general format for timed sequences of media data."
+Part 12 is known as [[ISO Base Media File Format]]. It is derived largely from Apple's QuickTime format and is described as a "general format for timed sequences of media data."
-Part 14 is an extension of Part 12. The recommended extension for it is ".mp4", though ".m4a" is often used for audio-only files. It is standardized by SO/IEC 14496-14.
+Part 14: Refer to [[MP4]].
 Part 15 is "MPEG-4 File Format for Advanced Video Coding." This specifies the use of Part 10 encoding with the Part 12 file format. the extension ".avc" is often used with it.
@@ Line 18: / Line 18: @@
 == Links ==
-* [[Wikipedia:MPEG-4 Part 14|Wikipedia article: MPEG-4 Part 14]]
+* [[Wikipedia:MPEG-4|Wikipedia: MPEG-4]]
 * [http://www.mp4ra.org/ MP4 Registration Authority]
 * RFC 4337 (MPEG-4 MIME type registration)