Asao (codec) - Use in Other Technology

Use in Other Technology

At the time of the release of Flash Player 6 in 2003, there was no free or open source software for encoding and decoding Nellymoser audio. Nellymoser Inc. sell a decoder for thousands of US dollars.

In March 2006, Adobe Systems' people posted to Flash Server development newsgroup information about an on-coming new tool for FLV audio (including Nellymoser audio) conversion to MP3/WAV. In July 2006, they announced that they have not been able to release the FLV/MP3 converter due to restrictions in Nellymoser license agreement. They found that they can only distribute this tool to be used with licensed copies of Flash Media Server.

In 2007, a project called "nelly2pcm" was created. In 2008, this project was removed from Google Code in response to a complaint under the U.S. Digital Millennium Copyright Act. There were also some other attempts for creating free Nellymoser decoder. Some apparently use a "wrapper" to force the flash ocx to play audio faster (e.g. 1:4 ratio), which redirects and grabs the audio output (wave) and then encodes it to MP3. This method does not use a licensed Nelly Moser codec.

In September 2007, a patch based on "nelly2pcm" was sent to FFmpeg multimedia framework development mailinglist. In October 2007, a patch for decoding Nellymoser audio was added to FFmpeg SVN. As of December 3, 2008, the open source FFmpeg project has encoding and decoding support for the Nellymoser Asao codec. Stable release with Nellymoser audio support is 0.5, released on March 10, 2009.

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