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Date: Sun, 22 Mar 2026 04:24:34 +0900
To: cygwin@cygwin.com
Subject: Re: [ffmpeg hevc] Build require amd gpu
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On Sat, 21 Mar 2026 14:34:27 -0400
jeremie bergeron wrote:
> By curiosity, what is the patent issue?
> The software decoder for hevc is LGPLv2.1, so why does it create an issue?

Even the libx265 is LGPL, HEVC itself is not royalty free.
If cygwin distributes ffmpeg which enables HEVC codec,
there is a rist that Access Advance may demand royalty payments.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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