[FFmpeg-devel] [RFC] Google Summer of Code 2013
Paul B Mahol
onemda at gmail.com
Wed May 8 10:38:27 CEST 2013
On 2/27/13, Maxim Polijakowski <max_pole at gmx.de> wrote:
> Am 27.02.2013 16:55, schrieb Roger Pack:
>> On 2/21/13, Lou Logan <lou at lrcd.com> wrote:
>>> It's GSoC time again, so I'll get the ball rolling:
>>> I started a new ideas list:
>> A few other wish list ideas, if anybody wants to run with them:
> I suggest to remove the GoToMeeting entry from this list. It sounds to
> me like another project that will never be completed in the GSoC time
> frame (3 month). Let me explain why:
> - due to the fact the "decoder specification" has been created in means
> of RE, it lacks the desired completeness. One need to dig into the
> binary code in order to extract missing parts
> - there is two issues with the ELS coder - the heart of the coding
> methods 2 and 3. Go2Meeting utilizes the augmented ELS that combines the
> vanilla ELS with a some sort of Q-coder in order to increase
> compression. This augmented version has been incompletely documented by
> a software patent. No one in the world would be ever able to reimplement
> this (weird) entropy coder using this patent alone.
> - fortunately, there is an open-source implementation of this coder
> written by the author of this compression method, Mr. Douglas Whiters.
> Though this code has been released under the GPL and a relicensing is
> required in order to use it within FFmpeg. One need to contact the
> author and ask for the appropriate permission. Should he disagree, we'll
> end up having another non-free piece of code.
> - FFmpeg's implementation of the JPEG need to be extended to include
> tables for Go2Meeting. The attached spec doesn't describe these tables.
> Remember the Atrac3plus task:
> Due to the similar conditions (incomplete spec, RE skills required) this
> task has been never completed. It took two years!!! in order to finish
> the decoder (which I'll publish soon)...
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