FFmpeg / Libav Summer Of Code 2011 - Revision history

Kierank: Add FEC.

2011-07-09T23:02:39Z

Add FEC.

← Older revision		Revision as of 16:02, 9 July 2011
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	* swscale largely implements MMX. Add SSE2 support using the yasm macro library.		* swscale largely implements MMX. Add SSE2 support using the yasm macro library.
	* Difficult variants: add OpenCL, high bit-depth support, gamma-accurate conversion, better dithering, or edge-directed interpolation.		* Difficult variants: add OpenCL, high bit-depth support, gamma-accurate conversion, better dithering, or edge-directed interpolation.

			=== Forward Error Correction ===
			Add FEC to libavutil - this is relevant to ESA summer of code.
			* RTP FEC, standardised as SMPTE 2022M (Possibly the same as Pro-MPEG FEC) - (not 100% sure if this is for all types of RTP or just some)
			* MPEG-TS 16 bytes extra - (not sure where this is standardised - in DVB perhaps?)


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

Astrange: /* 2nd Tier Project Proposals */

2011-04-14T21:52:44Z

2nd Tier Project Proposals

← Older revision		Revision as of 14:52, 14 April 2011
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	Also see [[Speex]].		Also see [[Speex]].

	=== CELT Decoder ===		=== CELT/Opus Decoder ===
	* Specification: http://celt-codec.org/docs		* Specification: http://celt-codec.org/docs
	Also see [[CELT]].		Also see [[CELT]].
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	=== H.264 4:2:2 (and 4:4:4?) ===		=== H.264 4:2:2 (and 4:4:4?) ===
	* Implement a 4:2:2 (and 4:4:4?) H.264 decoder.		* Implement a 4:2:2 (and 4:4:4?) H.264 decoder.

			=== SSE2 swscale ===
			* swscale largely implements MMX. Add SSE2 support using the yasm macro library.
			* Difficult variants: add OpenCL, high bit-depth support, gamma-accurate conversion, better dithering, or edge-directed interpolation.

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

Merbanan: /* Hardware accelerated decoder for Android devices */

2011-04-11T15:23:37Z

Hardware accelerated decoder for Android devices

← Older revision		Revision as of 08:23, 11 April 2011
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	will enable a lot of devices to install a libavcodec based media player while still having hardware accelerated H264 decode.		will enable a lot of devices to install a libavcodec based media player while still having hardware accelerated H264 decode.

	''Mentor: Benjamin Larsson''		''Mentor: Martin Storsjö, (co-mentor) Benjamin Larsson''

	=== Multithreading support ===		=== Multithreading support ===

Kierank: /* 2nd Tier Project Proposals */

2011-04-05T21:54:48Z

2nd Tier Project Proposals

← Older revision		Revision as of 14:54, 5 April 2011
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	=== H.264 MVC ===		=== H.264 MVC ===
	* Implement an H.264 MVC decoder. This format is used in 3D Blu-Rays.		* Implement an H.264 MVC decoder. This format is used in 3D Blu-Rays.

			=== H.264 4:2:2 (and 4:4:4?) ===
			* Implement a 4:2:2 (and 4:4:4?) H.264 decoder.

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

Compn: /* Finish SoC projects from previous years */ - ruby is working on jpeg2000 decoder task

2011-04-05T02:59:33Z

Finish SoC projects from previous years: - ruby is working on jpeg2000 decoder task

← Older revision		Revision as of 19:59, 4 April 2011
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	For the current status of all SoC projects up to date, see [[FFmpeg Summer Of Code]].		For the current status of all SoC projects up to date, see [[FFmpeg Summer Of Code]].

			:rukhsana afroz is working on jpeg2000 decoder

	=== Implement a Windows Video Presentation 2 decoder ===		=== Implement a Windows Video Presentation 2 decoder ===

Kierank: /* Standards Compliant TS Muxer */

2011-03-30T00:49:22Z

Standards Compliant TS Muxer

← Older revision		Revision as of 17:49, 29 March 2011
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	* In order to complete this task you must find (or ask for) the spec, read it and understand the buffering models and what you will need to do for each codec. It's much easier to start with MPEG codecs to begin with. In most cases this will involve extracting or guessing information from the input stream.		* In order to complete this task you must find (or ask for) the spec, read it and understand the buffering models and what you will need to do for each codec. It's much easier to start with MPEG codecs to begin with. In most cases this will involve extracting or guessing information from the input stream.
	* Sometimes spec-incompliant modes might be ok such as H.264 in TS files without HRD for iPod streaming.		* Sometimes spec-incompliant modes might be ok such as H.264 in TS files without HRD for iPod streaming.
			* Later work can focus on remuxing

	''Mentor: Kieran Kunhya		''Mentor: Kieran Kunhya

Kierank at 00:48, 30 March 2011

2011-03-30T00:48:17Z

← Older revision		Revision as of 17:48, 29 March 2011
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	=== AAC-LD ===		=== AAC-LD ===
	* Implement an AAC-LD decoder.		* Implement an AAC-LD decoder.

			=== H.264 MVC ===
			* Implement an H.264 MVC decoder. This format is used in 3D Blu-Rays.

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

Kierank: /* 1st Tier Project Proposals */

2011-03-30T00:45:51Z

1st Tier Project Proposals

← Older revision		Revision as of 17:45, 29 March 2011
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	''Mentor: Baptiste Coudurier		''Mentor: Baptiste Coudurier

			=== Standards Compliant TS Muxer ===

			* This is harder than it might seem at first because of the myriad of codecs and muxing rules.
			* In order to complete this task you must find (or ask for) the spec, read it and understand the buffering models and what you will need to do for each codec. It's much easier to start with MPEG codecs to begin with. In most cases this will involve extracting or guessing information from the input stream.
			* Sometimes spec-incompliant modes might be ok such as H.264 in TS files without HRD for iPod streaming.

			''Mentor: Kieran Kunhya

	== 1st tier proposals of last year ==		== 1st tier proposals of last year ==

Kierank: /* 2nd Tier Project Proposals */

2011-03-30T00:31:57Z

2nd Tier Project Proposals

← Older revision		Revision as of 17:31, 29 March 2011
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	* Implement an indev for DirectShow capture on Windows (and support A/V synchronisation).		* Implement an indev for DirectShow capture on Windows (and support A/V synchronisation).
	* Qualification: Get [http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/106245 GDI] and [http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/105810 waveform] capture integrated into FFmpeg SVN with A/V synchronisation. Both patches are almost finished.		* Qualification: Get [http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/106245 GDI] and [http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/105810 waveform] capture integrated into FFmpeg SVN with A/V synchronisation. Both patches are almost finished.

			=== AAC-LD ===
			* Implement an AAC-LD decoder.

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

Ronald S. Bultje: /* Multithreading support */

2011-03-29T12:51:38Z

Multithreading support

← Older revision		Revision as of 05:51, 29 March 2011
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	basic goal will be to add multithreading support to a variety of decoders in FFmpeg, by using existing infrastructure. Examples goals		basic goal will be to add multithreading support to a variety of decoders in FFmpeg, by using existing infrastructure. Examples goals
	could include:		could include:
	* ~~implement slice~~-~~based threading in FFmpeg's VP8 decoder~~		* Help merging the remaining bits of ffmpeg-mt into the main repository (i.e. H.264/MPEG decoder multithreading)
	* implement frame-based threading in FFmpeg's VP8 decoder
	* Fix problems with FFmpeg's slice-based H.264 decoder threading (ask Jason for details here)		* Fix problems with FFmpeg's slice-based H.264 decoder threading (ask Jason for details here)
	* Help merging the remaining bits of ffmpeg-mt into the main repository (i.e. H.264/MPEG decoder multithreading)
	* Implement functions in the ffmpeg/ffplay binaries to autodetect the number of CPUs/cores and autodetect the number of threads to use (if unspecified)		* Implement functions in the ffmpeg/ffplay binaries to autodetect the number of CPUs/cores and autodetect the number of threads to use (if unspecified)
	* define ways to use both slice-based and frame-based multithreading at the same time if decoders (and files) support both		* define ways to use both slice-based and frame-based multithreading at the same time if decoders (and files) support both
	* Multithreading in other decoders that currently don't support it		* Multithreading in other decoders that currently don't support it
			* implement slice-based and/or frame-based threading in FFmpeg's VP8 decoder
			* implement frame-based threading in MJPEG decoder
			* implement frame-based (or if you want to hurt yourself, try slice-based) multithreading in VC-1 decoder

	''Mentor: (hopefully) Alexander Strange and Ronald S. Bultje''		''Mentor: (hopefully) Alexander Strange and Ronald S. Bultje''