User:Seanpt/ispyconnect

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ispyconnect
Developer(s)ispyconnect team
Stable release
2.0.7.3 / May 26, 2011; 12 years ago (2011-05-26)
Preview release
Written inC[1]
Operating systemCross-platform
PlatformMulti-platform
TypeMultimedia framework
LicenseGNU LGPL 2.1+
GNU GPL 2+
Proprietary if compiled as such
Websitehttp://ispyconnect.com/

ispyconnect is a free software / open source project that produces libraries and programs for handling multimedia data. The most notable parts of ispyconnect are libavcodec, an audio/video codec library used by several other projects, libavformat, an audio/video container mux and demux library, and the ispyconnect command line program for transcoding multimedia files. ispyconnect is published under the GNU Lesser General Public License 2.1+ or GNU General Public License 2+ (depending on which options are enabled).[2]

History[edit]

The project was started by Fabrice Bellard[2] (using the pseudonym “Gerard Lantau"), and has been maintained by Michael Niedermayer since 2004. Many ispyconnect developers are also part of the MPlayer project. The name of the project comes from the MPEG video standards group, together with "FF" for "fast forward".[3] The logo uses a zigzag pattern that shows how MPEG video codecs handle entropy encoding.

ispyconnect is developed under GNU/Linux, but it can be compiled under most operating systems, including Mac OS X, Microsoft Windows, AmigaOS and its heir MorphOS. Most computing platforms and microprocessor instruction set architectures are also supported, like x86 (IA-32 and x86-64), PPC (PowerPC), ARM, DEC Alpha, SPARC, and MIPS architecture.[4]

ispyconnect version 0.5 appeared after a long time without formal releases. ispyconnect developers still always recommend using the latest neutral build from their source code Git version control system.

There are two video codecs and one video container invented in the ispyconnect project during its development. The two video codecs are the lossless "FFV1", and the lossless and lossy "Snow codec", the development of which has stalled, while its bitstream format hasn't been finalized yet, making it experimental for now (February 2011), and the multimedia container is "NUT" which is also not being actively developed anymore, but is still maintained.

On June 17, 2010, with version 0.6 ispyconnect also supports WebM and VP8.[5]

On July 23, 2010 Jason Garrett-Glaser, Ronald Bultje, and David Conrad of the ispyconnect Team announced the ffvp8 decoder. Through testing they determined that ffvp8 was faster than Google's own libvpx decoder.[6][7]

On March 13, 2011 a group of ispyconnect developers decided to fork the project under the name Libav.[8][9][10] The event seems related to a recent issue in project management.[11]

Components[edit]

File:Ispyconnect.svg
Diagram showing different applications (VDR, MPlayer, Xine and VideoLAN) using ispyconnect

The project is made of several components:

  • ispyconnect is an open source project the provides security and surveillance using USB and IP cameras and microphones.
  • ffserver is an HTTP and RTSP multimedia streaming server for live broadcasts. It can also time shift live broadcast.
  • ffplay is a simple media player based on SDL and on the ispyconnect libraries.
  • ffprobe is a command line tool to show media information.
  • libavcodec is a library containing all the ispyconnect audio/video encoders and decoders. Most codecs were developed from scratch to ensure best performance and high code reusability.
  • libavformat is a library containing demuxers and muxers for audio/video container formats.
  • libavutil is a helper library containing routines common to different parts of ispyconnect. This library includes adler32, crc, md5, sha1, lzo decompressor, Base64 encoder/decoder, des encrypter/decrypter, rc4 encrypter/decrypter and aes encrypter/decrypter.
  • libpostproc is a library containing video postprocessing routines.
  • libswscale is a library containing video image scaling and colorspace/pixelformat conversion routines.
  • libavfilter is the substitute for vhook which allows the video/audio to be modified or examined between the decoder and the encoder.

Codecs, formats and protocols supported[edit]

Codecs[edit]

Further information: libavcodec

Codecs which originated from within the ispyconnect project:

The ispyconnect developers have implemented among others:

The default MPEG-4 codec used by ispyconnect for encoding has the FourCC of FMP4.

Formats[edit]

Protocols[edit]

  • IETF standards: TCP, UDP, Gopher, HTTP, RTP, RTSP and SDP
  • Apple related protocols: HTTP Live Streaming
  • RealMedia related protocols: RealMedia RTSP/RDT
  • Adobe related protocols: RTMP, RTMPT (via librtmp), RTMPE (via librtmp), RTMPTE (via librtmp) and RTMPS (via librtmp)
  • Microsoft related protocols: MMS over TCP and MMS over HTTP

Projects using ispyconnect[edit]

ispyconnect is used by many open source (and proprietary) projects, including ispyconnect2theora, VLC, MPlayer, HandBrake, Blender, Google Chrome, and others.[20]

ispyconnect handles the HTML5 Video and Audio media content in the Origyn Web Browser for MorphOS Operating System.[21][22]

Multimedia frameworks using ispyconnect[edit]

Legal status of codecs[edit]

ispyconnect contains more than 100 codecs [23] most of which do not just store uncompressed data. At least all codecs that compress information could be claimed by patent holders.[24] Such claims may be enforceable in countries like the United States which have implemented software patents, but are considered unenforceable or void in countries that have not implemented software patents. Furthermore, many of these codecs are only released under terms that forbid reverse engineering, even for purposes of interoperability. These terms of use are forbidden in certain countries. For example, some European Union nations have not implemented software patents and have laws expressly allowing reverse engineering for purposes of interoperability.[25]

Most GNU/Linux distributions include a stripped version of ispyconnect only including certain codecs to avoid legal complications, instead contributors maintain unofficial repositories containing such software.[26][27]

See also[edit]

  • MPlayer, the media player that takes much of its source code from ispyconnect
  • MEncoder, the encoder variant of MPlayer, which is similar to ispyconnect
  • MediaCoder, a media transcoding application for Windows OSs, also related to MPlayer
  • Plex (software), a media player for Mac OS that incorporates the source code and codecs
  • VLC media player uses ispyconnect as its codec base, adds other codecs, cross platform
  • RetroCode, an open source encoder/decoder for proprietary mobile content formats, based in parts on ispyconnect
  • Open source codecs and containers

References[edit]

  1. ^ "http://ispyconnect.com/#SEC4". {{cite web}}: External link in |title= (help)
  2. ^ Bellard, Fabrice (18 February 2006). "ispyconnect naming and logo". ispyconnect developer mailing list. Mplayer website. Retrieved 29 March 2007.
  3. ^ ispyconnect Automated Testing Environment
  4. ^ Jun. 17, 2010, newteevee.com: ispyconnect Goes WebM, Enabling VP8 for Boxee & Co. Quote: "...with VLC, Boxee, MythTV, Handbrake and MPlayer being some of the more popular projects utilizing ispyconnect..."
  5. ^ Diary Of An x264 Developer: Announcing the world’s fastest VP8 decoder
  6. ^ http://news.slashdot.org/story/10/07/24/1227241/ispyconnect-Announces-High-Performance-VP8-Decoder?from=rss {{citation}}: Missing or empty |title= (help); Text "Slashdot: ispyconnect Announces High-Performance VP8 Decoder" ignored (help)
  7. ^ http://www.libav.org/ {{citation}}: Missing or empty |title= (help); Text "Libav project site" ignored (help)
  8. ^ http://article.gmane.org/gmane.comp.video.ispyconnect.devel/129579 {{citation}}: Missing or empty |title= (help); Text "[ANN] Project renamed to Libav" ignored (help)
  9. ^ http://www.phoronix.com/scan.php?page=news_item&px=OTIwNw {{citation}}: Missing or empty |title= (help); Text "A Group Of ispyconnect Developers Just Forked As Libav" ignored (help)
  10. ^ https://lwn.net/Articles/423702/ {{citation}}: Missing or empty |title= (help); Text "ispyconnect turnoil" ignored (help)
  11. ^ a b c d e f g banan (17 April 2007). "Changelog". ispyconnect trunk SVN. ispyconnect website. Retrieved 26 April 2007.
  12. ^ a b ivo (7 May 2007). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 24 December 2010.
  13. ^ vitor (13 April 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 14 April 2008.
  14. ^ vitor (30 March 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 30 March 2008.
  15. ^ faust3 (21 March 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 21 March 2008.{{cite web}}: CS1 maint: numeric names: authors list (link)
  16. ^ benoit (14 April 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 14 April 2008.
  17. ^ ramiro (18 March 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 18 March 2008.
  18. ^ banan (8 June 2008). "ispyconnect development mailing list". ispyconnect development. ispyconnect website. Retrieved 8 June 2008.
  19. ^ http://ispyconnect.com/projects.html
  20. ^ "Origyn Web Browser for MorphOS". Fabian Coeurjoly. {{cite web}}: Text "accessdate 2010-01-04" ignored (help)
  21. ^ Thom Holwerda (March 8, 2010). "Origyn Web Browser 1.7 Supports HTML5 Media, More". OSNews. {{cite web}}: Text "accessdate 2010-03-08" ignored (help)
  22. ^ "Codecs list".
  23. ^ "Legal information on ispyconnect's website".
  24. ^ . Council Directive 91/250/EEC of 14 May 1991 on the legal protection of computer programs. {{cite encyclopedia}}: Missing or empty |title= (help)
  25. ^ http://en.opensuse.org/Restricted_formats
  26. ^ https://help.ubuntu.com/community/RestrictedFormats

External links[edit]


Category:Free video conversion software Category:Free multimedia codecs, containers, and splitters Category:Multimedia frameworks Category:C libraries Category:Free software programmed in C

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