[Libav-user] Question regarding GNU General Public License (GPL)

[drwho]

Hi Edward,

No royalty is paid, but donations are welcome.  Axon, DVR Examiner, 
Amped, entities that distribute FFmpeg binary or distribute their own 
closed source binary that links to libav must

  * make an offer for the GPL source code used
  * enclose a copy of the GPL license along with the product.
  * supply compiling instructions.

to each end user of Axon, DVR Examiner, Amped, etc.  I would say these 
are the most important, but FFmpeg legal 
<https://www.ffmpeg.org/legal.html> has a complete list. Many companies 
completely violate FFmpeg's licensing terms including Bluesound / 
Lenbrook for the past 14 years.

Jon

On 2025-05-13 13:46, Edward Baker via Libav-user wrote:
> To whom it may concern,
> I am writing a white paper on forensic video analysis and the software 
> solutions many analyst throughout the world rely on for their 
> examinations.
> In the white paper, I discussed open source solutions as well as 
> commercially available software (sold to consumers) who incorporate 
> FFMpeg open source solutions such as the ffmepg libraries into their 
> commercial paid for software. Three such companies are;
>
>   * *Axon*; they sell a software program called "Axon Investigate"...
>     formerly owned by Occam Solutions and sold as "Input Ace"
>   * *DVR Examiner* now owned by Magnet Forensics and,
>   * *Amped* (sold internationally out of Italy)
>
> Given all three of these companies generate millions in sales each 
> year, do they pay or have to pay any fees or royalties?
> I would welcome any insight.
> If, I need to redirect my research question to someone else, please 
> let me know and provide the proper email address.
> Thank you in advance!
> Kind regards,
> Edward L. Baker
> LEVA Certified Forensic Video Analyst
> www.videoconsultantsnw.net <http://www.videoconsultantsnw.net>
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