Libavfilter - Revision history

Rogerdpack: /* See also */

2012-07-16T00:13:14Z

Vitor: Committed!

2010-05-07T19:30:45Z

Committed!

@@ Line 1: / Line 1: @@
 ==Reasons why a filter API is needed in FFmpeg==
 FFmpeg's already well-known [[libavcodec]] module has become the de facto standard library for video decoding and encoding in free software projects. Unfortunately, no similar standard library has surfaced for audio/video filtering and otherwise working with audio/video stream once it has been decoded. Various multimedia projects (such as MPlayer, Xine, GStreamer, VirtualDub, etc.) have implemented their own filter systems to various degrees of success. What is needed is a high quality audio and video filter API - efficient, flexible enough to meet all the requirements which have led various projects to invent their own filter system, and yet easy to use or develop new filters with. This proposal is to implement a high quality video API and filter library for FFmpeg, where it can be easily used by other multimedia-related software projects.
-== Issues that have to be fixed before adding to main tree ==
+== Possible known issues ==
 * no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])
 * make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report) -- '''Updated:''' probably fixed, but maybe not printing the right PAR in the terminal
@@ Line 43: / Line 37: @@
 *** Possible sources: [http://sourceforge.net/projects/deinterlace DScaler] or [http://www.mir.com/DMG/Software/y4mscaler.html y4mscale]?
 ** NTSC => PAL, and PAL => NTSC frame-rate (FPS) adjust and reclock filter for NTSC <=> PAL conversion
 == See also ==

Stefanosa: /* Past discussions on the topic */ Add links to the lavfi state of affairs saga

2010-02-02T00:16:45Z

Past discussions on the topic: Add links to the lavfi state of affairs saga

← Older revision		Revision as of 17:16, 1 February 2010
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	****http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2007-April/051142.html		****http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2007-April/051142.html
	*****http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2007-April/thread.html#51142		*****http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2007-April/thread.html#51142
			* The lavfi state of affairs saga
			** lavfi state of affairs: http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/80845/focus=80946
			** lavfi state of affairs 2: http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/85905
			** lavfi state of affairs 3: http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/93176/focus=93336

	*Take a look at other existing players API for filter plugins, like for example;		*Take a look at other existing players API for filter plugins, like for example;
	** [http://svn.mplayerhq.hu/mplayer/trunk/DOCS/tech/libmpcodecs.txt?revision=15625&view=markup MPlayer (libmpcodecs vf_*.c filters)], [http://xinehq.de/index.php/hackersguide#AEN864 Xine], [[ffdshow\|FFdshow]], [[VLC media player\|VLC]], [http://www.virtualdub.org/filtersdk VirtualDub], [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer], [http://www.foobar2000.org foobar], and [http://www.xmms.org/ XMMS]		** [http://svn.mplayerhq.hu/mplayer/trunk/DOCS/tech/libmpcodecs.txt?revision=15625&view=markup MPlayer (libmpcodecs vf_*.c filters)], [http://xinehq.de/index.php/hackersguide#AEN864 Xine], [[ffdshow\|FFdshow]], [[VLC media player\|VLC]], [http://www.virtualdub.org/filtersdk VirtualDub], [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer], [http://www.foobar2000.org foobar], and [http://www.xmms.org/ XMMS]


	==Mentors==		==Mentors==

Gamester17 at 14:10, 27 March 2008

2008-03-27T14:10:23Z

← Older revision		Revision as of 07:10, 27 March 2008
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	svn checkout svn://svn.mplayerhq.hu/soc/libavfilter		svn checkout svn://svn.mplayerhq.hu/soc/libavfilter

	Please read ~~its~~ [http://svn.mplayerhq.hu/soc/libavfilter/README?view=co README] to discover how to integrate libavfilter into ffmpeg and ffplay.		Please read [http://svn.mplayerhq.hu/soc/libavfilter/README?view=co the README.TXT for libavfilter] to discover how to integrate libavfilter into ffmpeg and ffplay.

	==Reasons why a filter API is needed in FFmpeg==		==Reasons why a filter API is needed in FFmpeg==

Gamester17 at 14:09, 27 March 2008

2008-03-27T14:09:39Z

← Older revision		Revision as of 07:09, 27 March 2008
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	Until it is incorporated into [[FFmpeg]], you may get the libavfilter source from [[FFmpeg Summer Of Code\|GSoC]] SVN repository:		Until libavfilter is fully incorporated into [[FFmpeg]], you may get the complete libavfilter source from [[FFmpeg Summer Of Code\|GSoC]] SVN repository:

	svn checkout svn://svn.mplayerhq.hu/soc/libavfilter		svn checkout svn://svn.mplayerhq.hu/soc/libavfilter

	Please read its [http://svn.mplayerhq.hu/soc/libavfilter/README?view=co README] to discover how to integrate ~~it with~~ ffmpeg and ffplay.		Please read its [http://svn.mplayerhq.hu/soc/libavfilter/README?view=co README] to discover how to integrate libavfilter into ffmpeg and ffplay.

	==Reasons why a filter API is needed in FFmpeg==		==Reasons why a filter API is needed in FFmpeg==

Vitor: /* Issues that have to be fixed before adding to main tree */ Update

2008-02-09T16:23:56Z

Issues that have to be fixed before adding to main tree: Update

← Older revision		Revision as of 09:23, 9 February 2008
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	== Issues that have to be fixed before adding to main tree ==		== Issues that have to be fixed before adding to main tree ==
	* ffmpeg.c/ffplay.c integration is broken (more details in -soc post [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-January/002324.html]) '''updated:''' has [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-February/002487.html patch]
	* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])		* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])
	* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])		* a padding filter is lacking (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596]) -- '''Updated:''' vdmsss is working on it
	* make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report).		* make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report) -- '''Updated:''' probably fixed, but maybe not printing the right PAR in the terminal
	** I have a patch for it in my local tree [[User:~~Vitor\|Vitor]] 12:33~~, ~~2 February 2008 (EST)~~

	== Feature wish list ==		== Feature wish list ==

Vitor: /* Issues that have to be fixed before adding to main tree */ Mention patch, avoid work duplication

2008-02-02T17:33:52Z

Issues that have to be fixed before adding to main tree: Mention patch, avoid work duplication

← Older revision		Revision as of 10:33, 2 February 2008
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	* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])		* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])
	* make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report).		* make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report).
			** I have a patch for it in my local tree [[User:Vitor\|Vitor]] 12:33, 2 February 2008 (EST)

	== Feature wish list ==		== Feature wish list ==

Vitor: /* Issues that have to be fixed before adding to main tree */ update

2008-02-01T21:21:46Z

Issues that have to be fixed before adding to main tree: update

← Older revision		Revision as of 14:21, 1 February 2008
Line 9:		Line 9:

	== Issues that have to be fixed before adding to main tree ==		== Issues that have to be fixed before adding to main tree ==
	* ffmpeg.c/ffplay.c integration is broken (more details in -soc post [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-January/002324.html])		* ffmpeg.c/ffplay.c integration is broken (more details in -soc post [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-January/002324.html]) '''updated:''' has [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-February/002487.html patch]
	* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])		* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])
	* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])		* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])
			* make ffmpeg.c honor the aspect ratio outputted by the filter chain (thanks vdmsss for the bug report).

	== Feature wish list ==		== Feature wish list ==

Vitor: /* Issues that have to be fixed before adding to main tree */ padding filter is a show-stopper

2008-01-10T18:57:51Z

Issues that have to be fixed before adding to main tree: padding filter is a show-stopper

← Older revision		Revision as of 11:57, 10 January 2008
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	* ffmpeg.c/ffplay.c integration is broken (more details in -soc post [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-January/002324.html])		* ffmpeg.c/ffplay.c integration is broken (more details in -soc post [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2008-January/002324.html])
	* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])		* no frame rate estimation is supported (see post in -soc [http://lists.mplayerhq.hu/pipermail/ffmpeg-soc/2007-December/002283.html])
			* padding filter (see [http://thread.gmane.org/gmane.comp.video.ffmpeg.user/14587/focus=14596])

	== Feature wish list ==		== Feature wish list ==

Gamester17: /* Feature wish list */

2008-01-05T16:36:51Z

Feature wish list

← Older revision		Revision as of 09:36, 5 January 2008
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	== Feature wish list ==		== Feature wish list ==
			'''Warning:''' This is not an official wish list. Before implementing any one of these items, ask first in the ffmpeg-devel mailing-list.
	'''Warning:''' This is not an official wish list. Before implementing any one of these items, ask first in ffmpeg-devel.

	* See the [http://svn.mplayerhq.hu/soc/libavfilter/TODO?view=co TODO file] in SoC SVN tree		* See the [http://svn.mplayerhq.hu/soc/libavfilter/TODO?view=co TODO file] in SoC SVN tree

← Older revision		Revision as of 17:13, 15 July 2012
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	* [[FFmpeg filter howto]]		* [[FFmpeg filter howto]]
	* [[FFmpeg audio API]]		* [[FFmpeg audio API]]
			* [http://ffmpeg.org/trac/ffmpeg/wiki/FilteringGuide FFmpeg filtering Guide]

	[[Category:FFmpeg]]		[[Category:FFmpeg]]