MultimediaWiki - User contributions [en]

User:Gkovacs

2009-09-01T07:50:42Z

Gkovacs:

Geza Kovacs worked on Playlist and Concatenation support as part of [[FFmpeg Summer Of Code|GSoC]] [[FFmpeg Summer Of Code 2009|2009]], mentored by [[User:Bcoudurier|Baptiste Coudurier]]. Full revision history for project can be found on [http://github.com/gkovacs/ffmpeg-concat/tree/master GitHub]

FFmpeg / Libav Summer Of Code

2009-08-25T20:59:48Z

Gkovacs: inline link

The [[FFmpeg]] project has been a participant in the [http://code.google.com/soc/ Google Summer of Code] program since 2006.

* [[FFmpeg_Summer_Of_Code_2009|2009 project page]]
* [[FFmpeg Summer Of Code 2008|2008 project page]]
* [[FFmpeg Summer Of Code 2007|2007 project page]]
* [[FFmpeg Summer Of Code 2006|2006 project page]]

Each accepted project is developed in its own sandbox, separate from the main FFmpeg codebase. Naturally, the end goal of each of the accepted FFmpeg projects ought to be to have that code in shape for acceptance into the production codebase. This page tracks the status of each project and how well each student did.

== 2006 Projects ==

=== VC-1 Decoder ===
* Student: [[User:Kostya|Kostya Shishkov]]
* Mentor: [[User:Multimedia Mike|Mike Melanson]]
* Student Status: FFmpeg committer
* Code Status: Accepted into the FFmpeg codebase.

=== AMR-NB Decoder ===
* Student: [[User:superdump|Robert Swain]]
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: FFmpeg committer. Project not finished during SoC.
* Code Status: Floating point code has been implemented up to synthesis. The next step is to debug the synthesis input and code. Documented on [[AMR-NB]].

=== AC-3 Decoder ===
* Student: [[User:Cloud9|Kartikey Mahendra BHATT]]
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: disappeared, project unfinished
* Code Status: Picked up by [[User:Jruggle|Justin Ruggles]] and committed to FFmpeg.

=== AAC Decoder ===
* Student: Maxim Gavrilov
* Mentor: [[User:ods15|Oded Shimon]]
* Student Status: disappeared, project unfinished
* Code Status: Picked up by [[User:andoma|Andreas Öman]] and [[User:superdump|Robert Swain]] and committed to FFmpeg.

=== Vorbis Encoder ===
* Student: Mathew Philip
* Mentor: [[User:ods15|Oded Shimon]]
* Student Status: disappeared, project barely started
* Code Status: Picked up by [[User:ods15|Oded Shimon]] and committed to FFmpeg.

== 2007 Projects ==

=== RealVideo 4 Decoder ===
* Student: [[User:Kostya|Kostya Shishkov]]
* Mentor: [[User:Multimedia Mike|Mike Melanson]]
* Student Status: FFmpeg committer
* Code Status: Accepted into the FFmpeg codebase. The project goal morphed to include a RealVideo 3 decoder since the 2 schemes are so similar.

=== QCELP Decoder ===
* Student: [[User:Reynaldo|Reynaldo Verdejo Pinochet]]
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: FFmpeg commiter. Produced a working decoder during SoC but the code didn't reach SVN before the end of the program.
* Code Status: Picked up by Kenan Gillet and with the help of [[User:Reynaldo|Reynaldo]] committed to FFmpeg. Some features still missing, though.

=== Matroska Muxer ===
* Student: David Conrad
* Mentor: [[User:aurel|Aurélien Jacobs]]
* Student Status: FFmpeg committer
* Code Status: Accepted into the FFmpeg codebase.

=== Video Filter API (AKA [[Libavfilter|libavfilter]]) ===
* Student: [[User:Koorogi|Bobby Bingham]]
* Mentor: [[User:Merbanan|Benjamin Larsson]] and Michael Niedermayer
* Student Status: project not finished during SoC but continues working on it
* Code Status: Parts have been committed to FFmpeg, but remain disabled. Still in development (albeit slowly) by [[User:Koorogi|Bobby Bingham]] and [[User:Vitor|Vitor]]. 2009 SoC projects are underway to complete its integration and add audio support.

=== E-AC-3 Decoder ===
* Student: Bartlomiej Wolowiec
* Mentor: [[User:Jruggle|Justin Ruggles]]
* Student Status: FFmpeg committer; code produced worked for most available samples, but there were some unimplemented features.
* Code Status: Picked up by [[User:Jruggle|Justin Ruggles]], finished and committed to FFmpeg.

=== JPEG 2000 Encoder and Decoder ===
* Student: Kamil Nowosad
* Mentor: [[User:pengvado|Loren Merritt]]
* Student Status: disappeared, project unfinished
* Code Status: The code is working but not all features are supported.

=== Dirac Encoder and Decoder ===
* Student: Marco Gerards
* Mentor: [[User:Lu_zero|Luca Barbato]]
* Student Status: Project not finished during SoC but continues working on it.
* Code Status: The decoder is in good shape, the encoder still needs more work. Both need to be updated to the latest spec.

=== TS Muxer ===
* Student: Xiaohui Sun
* Mentor: [[User:bcoudurier|Baptiste Coudurier]]
* Student Status: disappeared, project unfinished
* Code Status: [[Interesting Patches#PES packetizer by Xiaohui Sun|Changes]] requested during the review process for FFmpeg inclusion were never made.

== 2008 Projects ==

=== Generic frame-level multithreading support ===
* Student: Alexander Strange
* Mentor: Kristian Jerpetjoen
* Student Status: active
* Code Status: in process here: http://gitorious.org/projects/ffmpeg/repos/ffmpeg-mt

=== Nellymoser Encoder ===
* Student: Bartlomiej Wolowiec
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: FFmpeg committer
* Code Status: Accepted into the FFmpeg codebase.

=== ALAC Encoder ===
* Student: [[User:Jai|Jai Menon]]
* Mentor: [[User:Jruggle|Justin Ruggles]]
* Student Status: FFmpeg committer
* Code Status: Accepted into the FFmpeg codebase.

=== LGPL reimplementation of GPL sws_scale parts ===
* Student: Keiji Costantini
* Mentor: [[User:Lu_zero|Luca Barbato]]
* Student Status: project unfinished
* Code Status: The GPL YUV table generator has since been implemented as LGPL by [[User:Kostya|Kostya Shishkov]].

=== AAC-LC Encoder ===
* Student: [[User:Kostya|Kostya]]
* Mentor: [[User:Andoma|Andreas Öman]]
* Student Status: active
* Code Status: merged but still missing some features, [[User:AConverse|Alex Converse]] is working on finishing it.

=== MLP/TrueHD encoder ===
* Student: [[User:Angustia|Ramiro Polla]]
* Mentor: [[User:Jruggle|Justin Ruggles]]
* Student Status: active
* Code Status: in process, the first stage, getting the MLP decoder into shape and committed, has been accomplished.

=== WMA Pro Decoder ===
* Student: Sascha Sommer
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: active
* Code Status: in process, fully functional code in SoC SVN tree [http://svn.ffmpeg.org/soc/wmapro/]

=== MXF Muxer ===
* Student: [[User:spyfeng|Zhentan Feng]]
* Mentor: [[User:Bcoudurier|Baptiste Coudurier]]
* Student Status: finished project
* Code Status: Accepted into the FFmpeg codebase.

== 2009 Projects ==

=== RTMP Support (Flash streaming) ===
* Student: [[User:Kostya|Kostya Shishkov]]
* Mentor: [[User:Ronald S. Bultje|Ronald Bultje]]
* Student Status: active
* Code Status: in process

=== libswscale cleanup ===
* Student: [[User:Angustia|Ramiro Polla]]
* Mentor: [[User:reimar|Reimar Döffinger]]
* Student Status: active
* Code Status: in process

=== S/PDIF muxer ===
* Student: Bartlomiej Wolowiec
* Mentor: [[User:Merbanan|Benjamin Larsson]]
* Student Status: active
* Code Status: in process

=== Playlist/Concatenation Support for FFmpeg ===
* Student: [[User:Gkovacs|Geza Kovacs]]
* Mentor: [[User:Bcoudurier|Baptiste Coudurier]]
* Student Status: active
* Code Status: in process

=== JPEG2000 decoder and encoder ===
* Student: [[User:Jai|Jai Menon]]
* Mentor: [[User:Jruggle|Justin Ruggles]]
* Student Status: active
* Code Status: in process

=== Implement the New Seeking API in Libavformat ===
* Student: [[User:spyfeng|Zhentan Feng]]
* Mentor: [[User:Bcoudurier|Baptiste Coudurier]]
* Student Status: active
* Code Status: in process

=== [[MPEG-4 Audio Lossless Coding (ALS)|MPEG-4 ALS]] decoder ===
* Student: Thilo Borgmann
* Mentor: [[User:Jruggle|Justin Ruggles]]
* Student Status: active
* Code Status: in process

=== Implementation of AVFilter infrastructure and various audio filters ===
* Student: Kevin Dubois
* Mentor: [[User:Vitor|Vitor Sessak]]
* Student Status: active
* Code Status: in process

=== Finish AMR-NB decoder and write an encoder ===
* Student: Colin McQuillan
* Mentor: [[User:superdump|Robert Swain]]
* Student Status: active
* Code Status: in process

[[Category:FFmpeg]]

User:Gkovacs

2009-08-25T20:58:45Z

Gkovacs:

Worked on Playlist and Concatenation support as part of [[FFmpeg Summer Of Code|GSoC]] 2009. Full revision history for project can be found on [http://github.com/gkovacs/ffmpeg-concat/tree/master GitHub]

Small FFmpeg Tasks

2009-03-31T13:53:30Z

Gkovacs: claiming lavf-based concatenation tool

This page contains ideas for small, relatively simple tasks for the [[FFmpeg]] project. People who might be interested in trying one of these tasks:
* Someone who wants to contribute to FFmpeg and needs to find a well-defined task to start with
* Someone who wishes to qualify for one of FFmpeg's coveted [[FFmpeg Summer Of Code|Summer of Code]] project slots
* An existing FFmpeg developer who has been away from the project for a while and needs a smaller task as motivation for re-learning the codebase

For other tasks of varying difficulty, see the [[Interesting Patches]] page.

'''If you would like to work on one of these tasks''', please take these steps:
* Subscribe to the [https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel FFmpeg development mailing list] and indicate your interest
* Ask [[User:Multimedia Mike|Multimedia Mike]] for a Wiki account so you can claim your task on this Wiki

'''If you would like to add to this list''', please be prepared to explain some useful details about the task. Excessively vague tasks with no supporting details will be ruthlessly deleted.

=== Finish up a previous incomplete SoC project ===

Several SoC projects from previous years have not yet made it into FFmpeg. Taking any of them and finishing them up to the point that they can be included should make for a good qualification task. Check out the [[FFmpeg Summer Of Code]] overview page and look for the unfinished projects, like AMR-NB, Dirac, TS muxer, JPEG 2000.

=== Generic Colorspace system ===
This task involves adding support more than 8 bits per component (Y on 10 bits, U on 10 bits, V on 10 bits for example)
and generic simple conversion to other colorspaces.

''Does this have to do with revising FFmpeg's infrastructure? If so, then it doesn't feel like a qualification task. If it's something simpler, then the vague description does not convey that simplicity. Please expound.'' --[[User:Multimedia Mike|Multimedia Mike]] 12:56, 25 February 2008 (EST)

''I don't think so, extending PixFmt to extended structure with finegrained description like depth, range values, colorspace, sample period, and write generic simple conversion from all formats to all others, like suggested by Michael on the mailing list. Conversion routine can be a good qualification task for video encoders/decoders. What do you think ?
--[[User:Bcoudurier|Baptiste Coudurier]] 00:30, 29 February 2008 (EST)

''* Adding the [[YCoCg]] colorspace (with different sized planes) for RGB sourced pictures would be nice too. [[User:Elte|Elte]] 07:15, 16 March 2009 (EDT)

=== Make the SoC dts encoder multichannel capable ===
Here is a skeleton for a dts encoder http://svn.mplayerhq.hu/soc/dcaenc/, currently it can only encode stereo streams.
The task is to extend it to support 5.1 channels also.

Specs and info can be found here:
http://wiki.multimedia.cx/index.php?title=DTS

=== GIF LZW Encoder and extend Encoder and Decoder to support Animated GIFs ===

Lzw encoder is already used for TIFF, it must be extended to support GIF flavor.

:''Claimed by Samuel Simon''

=== Patch cleanup for MPEG 1 & 2 optimizations ===
Details are in the issue tracker: http://roundup.ffmpeg.org/roundup/ffmpeg/issue100

=== Implement a Vivo demuxer for FFmpeg ===
Implement an FFmpeg demuxer for the [[Vivo]] file format. The best reference for understanding the format would be MPlayer's [http://svn.mplayerhq.hu/mplayer/trunk/libmpdemux/demux_viv.c?view=markup existing .viv demuxer].

This task corresponds to issue 99: http://roundup.ffmpeg.org/roundup/ffmpeg/issue99

''I am ready to help out with understanding MPlayer's demuxer, esp. MPlayer API stuff if necessary.
--[[User:Reimar|Reimar]] 15:46, 1 March 2008 (EST)
:Daniel Verkamp is currently working on this task as a qualification for Google SoC 2009 --[[User:Ce|Ce]] 05:30, 21 March 2009 (EDT)

=== Port missing demuxers from MPlayer to FFmpeg ===
MPlayer supports a few container formats in libmpdemux that are not yet present in libavformat. Porting them over and gettting them relicensed as LGPL or reimplementing them from scratch should make reasonable small tasks.

# TiVo -- ''Jai Menon is working on this''
# VIVO -- ''Daniel Verkamp has a patch for this''
# XMMS
# libnemesi
# SL support for MPEG-TS
# MNG

=== Optimal Huffman tables for (M)JPEG ===
This task is outlined at http://guru.multimedia.cx/small-tasks-for-ffmpeg/ and is tracked in the issue tracker: http://roundup.ffmpeg.org/roundup/ffmpeg/issue267
:Indrani Kundu Saha is currently working on this task as a qualification for Google SoC 2009 --[[User:Ce|Ce]] 19:41, 13 March 2009 (EDT)

=== YOP Playback System ===
This task is to implement an FFmpeg playback subsystem for [[Psygnosis YOP]] files. This will entail writing a new file demuxer and video decoder, both of which are trivial by FFmpeg standards. [[Psygnosis YOP|The Psygnosis YOP page]] contains the specs necessary to complete this task and points to downloadable samples.

=== M95 Playback System ===
This task is to implement an FFmpeg playback subsystem for [[M95]] files. This will entail writing a new file demuxer and video decoder (the audio is already uncompressed), both of which are trivial by FFmpeg standards. [[M95|The M95 page]] contains the specs necessary to complete this task and points to downloadable samples.
:''Claimed by Tomren

=== BRP Playback System ===
This task is to implement an FFmpeg playback subsystem for [[BRP]] files. This will entail writing a new file demuxer as well as a video decoder that can handle at least 2 variations of format data. Further, write an audio decoder for the custom DPCM format in the file. All of these tasks are considered trivial by FFmpeg standards. [[BRP|The BRP page]] contains the specs necessary to complete this task and points to downloadable samples for both known variations.

=== 16-bit Interplay Video Decoder ===
FFmpeg already supports [[Interplay MVE]] files with [[Interplay Video|8-bit video data]] inside. This task involves supporting 16-bit video data. The video encoding format is mostly the same but the pixel size is twice as large. Engage the ffmpeg-devel list to discuss how best to approach this task.

=== 16-bit VQA Video Decoder ===
FFmpeg already supports Westwood [[VQA]] files. However, there are 3 variations of its custom video codec. The first 2 are supported in FFmpeg. This task involves implementing support for the 3rd variation. Visit the VQA samples repository: http://samples.mplayerhq.hu/game-formats/vqa/ -- The files in the directories Tiberian Sun VQAs/, bladerunner/, and dune2000/ use the 3rd variation of this codec. The [[VQA|VQA page]] should link to all the details you need to support this format.

:''Claimed by Deep Pal/The Deep Explorer ([http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-March/065522.html reference])''

=== HNM4 Playback System ===
This task is to implement an FFmpeg playback subsystem for [[HNM4]] variant of the [[HNM]] format. This will entail writing a new file demuxer and video decoder, both of which are trivial by FFmpeg standards. [[HNM4|The HNM4 page]] contains the specs necessary to complete this task and links to downloadable samples.

=== Apple RPZA encoder ===
A patch was once sent to the ffmpeg-devel mailing list to include an encoder for the [[Apple RPZA]] video codec. That code can be found on the "[[Interesting Patches]]" page. This qualification task involves applying that patch so that it can compile with current FFmpeg SVN code and then cleaning it up per the standards of the project. Engage the mailing list to learn more about what to do.
:''Claimed by Jai Menon''

=== QuickTime Edit List Support ===
Implement edit list support in FFmpeg's QuickTime demuxer (libavformat/mov.c). This involves parsing the 'elst' atom in a QuickTime file. For a demonstration of how this is a problem, download the file menace00.mov from http://samples.mplayerhq.hu/mov/editlist/ and play it with ffplay or transcode it with ffmpeg. Notice that the audio and video are ever so slightly out of sync. Proper edit list support will solve that. Other samples in that directory also presumably exhibit edit list-related bugs. The [http://xine.cvs.sourceforge.net/xine/xine-lib/src/demuxers/demux_qt.c?view=markup Xine demuxer] has support for this, it might be useful for hints.

:Krishna Gadepalli is working on this (patch submitted to ffmpeg-devel , currently in review) --[[User:Compn|Compn]] 10:35, 14 March 2009 (EDT)

=== Reimplement libavcodec/fdctref.c ===
The forward double precision DCT in this file has a non-free license. We need an LGPL replacement of this file.
:Dylan Yudaken is currently working on this task as a qualification for Google SoC 2009 --[[User:Ce|Ce]] 16:27, 18 March 2009 (EDT)

=== Implement the Flash Screen Video codec version 2 ===
FFmpeg is missing both a decoder and an encoder. Would be nice to have that.

:''Daniel Verkamp is working on this''

=== Add wma fixed point decoder back into libavcodec ===
http://svn.rockbox.org/viewvc.cgi/trunk/apps/codecs/libwma/
Rockbox's fixed-point WMA decoder was adapted from the decoder in libavcodec.

=== RealAudio 14.4 encoder ===
FFmpeg contains a decoder for [[RealAudio 14.4]], a farily simple integer CELP codec. Write an encoder. This would be a good qualification task for anyone interested in working on AMR, Speex, or sipr.

=== VC1 timestamps in m2ts ===

Codec copy of VC1 from m2ts currently doesn't work. Either extend the VC1 parser to output/fix timestamps, or fix the timestamps from m2ts demuxing.

=== FLIC work ===

Revise the [[Flic Video]] decoder at libavcodec/flicvideo.c to support video transported in AVI or MOV files while making sure that data coming from the usual FLI files still works. 'AFLC' and 'flic' FourCC samples are linked from the [[Flic Video]] page.

=== CorePNG Decoder ===

Extend FFmpeg's PNG decoder to handle the difference frames and [[YUV]] colorspace added in [[CorePNG]]. Sample at [http://samples.mplayerhq.hu/V-codecs/PNG1/ http://samples.mplayerhq.hu/V-codecs/PNG1/]
:''Claimed by Thilo Borgmann''

=== Extend PNG Decoder / swscale ===

get this png working in ffpng: http://roundup.ffmpeg.org/roundup/ffmpeg/issue813 .

http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-February/063450.html

This does more than just simple rgb48 input also it does not try to preserve
the 16bit per component.

anyway, if someone wants to do something in this direction like trying to push
this patch in (its yuv2rgb part needs to be adapted to what we have in svn
now) or try to do rgb48 input with preserving of 16bits per component then
IMHO thats a valid qualification task

=== CJPG format ===

Extend FFmpeg's MJPEG decoder to handle the different frames/packing of CJPG. Samples at: http://roundup.ffmpeg.org/roundup/ffmpeg/issue777

=== Optimize Theora Decoder ===

speed up the Theora decoder. [http://www.archive.org/download/AlternativeFreedom/alternative_freedom.ogg 720:480 sample] hits 100% cpu on a p4 1.5ghz.
:''Do you have any specific optimizations tips? I like these small tasks to present a clearer jumping-off point. --[[User:Multimedia Mike|Multimedia Mike]] 18:57, 22 December 2008 (EST)''
::''did theora make use of the mmx/sse functions of ffvp3? i was looking at the xiph GSOC page which mentioned a similar task. --[[User:Compn|Compn]] 21:17, 22 December 2008 (EST)''
::''The major optimization I can think of is reworking coefficient decoding to avoid the continue in unpack_vlcs() (basically by having a list of coefficient VLCs for each position rather than for each block, then decoding them when actually rendering the block.) Unfortunately this also requires reworking render_slice() and reverse_dc_prediction() quite significantly which is why I haven't done it yet. [[User:Yuvi|Yuvi]] 18:25, 23 December 2008 (EST)''

=== flip flag for upside-down codecs ===

<pre>about the flip, a patch that decodes images fliped when
codec_tag == ff_get_fourcc("GEOX") is welcome.
its a metter of 2lines manipulating data/linesize of imgages after
get_buffer() or something similar
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
</pre>
more info:
http://roundup.ffmpeg.org/roundup/ffmpeg/issue741

=== lavf-based concatenation tool ===

Unless we have multiple files input in FFmpeg, it would be nice to have some libavformat-based tool that would extract frames from multiple files (possible different containers as well) and put them into single one.

:''Claimed by Geza Kovacs''

=== cljr and vcr1 encoders ===
According to this: http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-February/063647.html both of the encoders are disabled, and won't compile if enabled. Michael would prefer to keep them around, and have someone grow them into full encoders.

=== Add waveformat extensible support in wav muxer ===
http://article.gmane.org/gmane.comp.video.ffmpeg.devel/79503
Clean up that patch.

:''Claimed by zhentan feng''

=== implement some colorspace fourcc/codecs ===
some colorspace formats were uploaded to http://samples.mplayerhq.hu/V-codecs/
including:
2vuy.avi
CYUV.AVI
P422.AVI
UYNV.AVI
UYNY.avi
V422.AVI
YUNV.AVI
a12v.avi
auv2.avi
and V-codecs/yuv8/MAILTEST.AVI .

step by step tutorial for adding new input formats to swscale:
cd mplayer/libswscale/
svn di -r20426:20427
the hunks 3 and 5 you dont need, they are optional special converters
also the change to isSupportedOut() you dont need
above will add a new input format

another example for adding an input format
cd mplayer/libswscale/
svn di -r20604:20605

=== Create a libamr compatible library of the Android amr codec ===
http://android.git.kernel.org/?p=platform/external/opencore.git;a=tree;f=codecs_v2/audio/gsm_amr/amr_nb;h=4bac3ee5bd1ae8b6955f2d0bdac7de43c0d985c1;hb=HEAD

=== Make the rtp demuxer support rtcp BYE packets ===
rtcp BYE (203) packets are sent from the sender to the receiver to notify that a stream has ended.
FFmpeg currently ignores them.

Sample url rtsp://media.lscube.org/tests/tc.mov

=== Implement the RTP/Vorbis payload ===
This is supported by the [http://www.lscube.org/projects/feng feng RTSP server], and is described in [http://tools.ietf.org/html/rfc5215 RFC 5215]. For testing, you can set up a local feng RTSP server to stream some local Vorbis file, or you can use the online feng test-server (rtsp://media.lscube.org:554/tests/rms_profumo_1.ogv).

Most likely, your implementation will consist of a file called rtp_vorbis.c in libavformat/, which will read the header packets available in the SDP (the "configuration" piece in the fmtp: line) and which parses individual incoming RTP packets from the RTSP demuxer (minus the generic RTP header bits). It should output Vorbis-encoded frames which can subsequently be decoded by the Vorbis decoder in libavcodec/.

:Colin McQuillan is working on this GSoC qualification task

=== Implement the RTP/Theora payload ===
The Theora payload is currently still a [http://svn.xiph.org/trunk/theora/doc/draft-ietf-avt-rtp-theora-00.txt draft]. Yet, it would be nice to support this payload. As per above, the [http://www.lscube.org/projects/feng feng RTSP server] supports the Theora RTP payload draft and can be used for testing your implementation of the draft, or you can use the online feng test-server (rtsp://media.lscube.org:554/tests/rms_profumo_1.ogv).

Most likely, your implementation will consist of a file called rtp_theora.c in libavformat/, which will read the header packets available in the SDP (the "configuration" piece in the fmtp: line) and which parses individual incoming RTP packets from the RTSP demuxer (minus the generic RTP header bits). It should output Theora-encoded frames which can subsequently be decoder by the Theora decoder in libavcodec/.

:''Claimed by Ilya S. Smelykh''

=== cdg decoder + demuxer ===
create a [[CD Graphics]] decoder/demuxer. implementations: http://www.kibosh.org/pykaraoke/ or http://users.fbihome.de/~glogow/ or http://miageprojet.unice.fr/twiki/bin/view/Fun/JavaKarPlayer or http://www.kibosh.org/cdgtools/ or this http://bat-kolio.net/cdg2video/ (which uses ffmpeg).

=== support for [[YCoCg]]/RGB colorspace in FFV1 ===
Add support for [[YCoCg]] and [[RGB]] encoded sources for the [[FFV1]] codec

This would add a free lossless intra-frame RGB codec for all by FFmpeg supported platforms (most important MacOS + Windows) which is often asked for video editing in video forums (e.g. slashcam.de)

=== Metal Gear Solid Video format demuxer ===
Write a demuxer to play video files harvested from the game Metal Gear Solid: The Twin Snakes. The format is described on the wiki page [[Metal Gear Solid VP3]] (which also contains links to samples). This page is based on observations and conjecture, so remember to engage the ffmpeg-devel mailing list with questions.

=== [[IFF#ANIM|IFF ANIM]] decoder ===
Modify libavformat/iff.c to handle this chunk and write a decoder for the format. The wiki page at [[IFF#ANIM|IFF ANIM]] has links to more information and source code. Samples can be found at http://www-user.tu-chemnitz.de/~womar/projects/iffanim/iffanim_samplepack.zip .

=== [[CDXL]] decoder ===
Write a decoder for this format using the information in the [[CDXL]] wiki page

=== Parse TrueHD and AC3 out of Blu-Ray m2ts files ===
Make libavformat properly parse this sample:
http://madshi.net/hd_dolby_true_hd.m2ts
Track #0.1 has TrueHD and AC3 interleaved. Check if the demuxer (libavformat/mpegts.c) is able to cleanly separate TrueHD and AC3. If that's impossible, call both TrueHD and AC3 parsers in a way that properly splits the packets. Use eac3to to see the expected split output.

[[Category:FFmpeg]]