CoreAVC
From Wikipedia, the free encyclopedia
| CoreAVC Video Codec | |
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| Developed by | CoreCodec, Inc. |
| Initial release | ? |
| Stable release | 1.7.0.0 (April 15, 2008) [+/−] |
| Preview release | ? (Internal Beta) [+/−] |
| Written in | ? |
| OS | Windows |
| Available in | ? |
| Genre | Codec |
| License | Proprietary |
| Website | www.coreavc.com |
CoreAVC is a proprietary Windows codec for decoding the H.264/MPEG-4 AVC (= Advanced Video Coding) video format.
The decoder is currently one of the fastest software decoders, and even matches some hardware-based ones.[1] This may allow computers with less processing power to play back lower-resolution AVC video content, and computers with more processing power to play high-definition video. The quickness of the codec is based on multi-threaded decoding. At the moment this technique is not consequently used by freely available codecs like the x264 and ffmpeg/libavcodec project family, but the multi-threading approach is very useful for the decoding of high-definition video (HD) H.264/AVC streams. The price for the CoreAVC codec with the most features is around $15.
In December 2005, CoreCodec, Inc. has indicated that it will have a matching video encoder in the future.[2] CoreAVC is included as a part of the CorePlayer Multimedia Framework and is now also used by Joost.[3]
[edit] The CoreAVC-For-Linux DMCA complaint
An open source project named CoreAVC-For-Linux hosted at Google Code, patches the loader code in the open source media player program mplayer and allows it to use the windows only CoreAVC DirectShow filter in free-software environments. It does not include CoreAVC, but simply allows mplayer to make use of it. This project also contains patches to use the proprietary codec in MythTV, a open source software for Home Theater Personal Computers and the media player xine.
In May 2008 the CoreAVC-For-Linux project was taken down by Google due an DMCA complaint [4]. There was speculation about this DMCA complaint, because the project as a wrapper did not use any copyrighted material, but maybe reverse engineering techniques were used without prior permission, which CoreCodec, Inc. interpreted as a violation of the DMCA.[5] CoreCodec has stated that reverse engineering was the reason, and it was in error[6] and has apologized to the community[7]. The author has said "CoreAVC-for-Linux should be back online soon"[8].
[edit] References
- ^ CoreAVC stronger than AVIVO & PureVideo ? (April 2006)
- ^ CoreCodec/H.264 Codec "CoreAVC" - Doom9's Forum
- ^ Joost - FAQ: Technology
- ^ CoreCodec complains of copied code. Chilling Effects Clearinghouse (2008-04-30). Retrieved on 2008-05-05.
- ^ DMCA takedown of coreavc-for-linux/CoreCodec Homepage (May 2008)
- ^ DMCA takedown of coreavc-for-linux, message 5780 (May 2008)
- ^ DMCA takedown of coreavc-for-linux, message 5785 (May 2008)
- ^ DMCA takedown of coreavc-for-linux, message 5783 (May 2008)
[edit] External links
- The CoreAVC H.264 Homepage
- CoreCodec Homepage
- Doom9.org Discussion on CoreAVC
- Openlaw - the current US law and Reverse Engineering
- coreavc-for-linux - Google Code
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