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Date: Sat, 21 Mar 2026 13:05:52 +0300
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To: jeremie bergeron <jeremiebergeron1515 AT gmail DOT com>, cygwin AT cygwin DOT com
Subject: Re: [ffmpeg hevc] Build require amd gpu
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From: Andrey Repin via Cygwin <cygwin AT cygwin DOT com>
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Greetings, jeremie bergeron!

> With ffmpeg 8.0.1-4, if I run the command: ffprobe hdr10tags-stream.mp4, I
> get this error:
> [AMF @ 0xa00056680] DLL amfrt64.dll failed to open
> [hevc_amf @ 0xa00053800] Failed to create  hardware device context (AMF) :
> Unknown error occurred
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0xa0004ca40] Failed to open codec in
> avformat_find_stream_info
> [AMF @ 0xa00056a40] DLL amfrt64.dll failed to open
> [hevc_amf @ 0xa00053800] Failed to create  hardware device context (AMF) :
> Unknown error occurred

> It is pretty normal that it fails since I don't have an amd gpu, so I
> don't have the amfrt64 dll.

> Note that any hevc file will produce this error. hdr10tags-stream.mp4 is
> available here:
> https://storage.googleapis.com/ffms2tests/hdr10tags-stream.mp4

> Would it be possible to disable this hardware decoder?

Yes, and Google easily suggests at least 2 ways to do it quicky.
Simplest would be to explicitly tell ffprobe to use `-c:v hevc` avoiding the
initialization of hardware-bound hevc_amf.
Another one is to check if ffprobe inheriting some of the ffmpeg configuration
options, like an environment variable or a configuration file forcing hardware
acceleration globally.
In some builds, ffprobe might be inheriting settings that trigger -hwaccel.
Ensure you aren't accidentally passing -hwaccel amf in your command or
environment.


-- 
With best regards,
Andrey Repin
Saturday, March 21, 2026 13:02:27

Sorry for my terrible english...


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