[FFmpeg-devel] Re: [DISCUSSION] Adding ARM64EC support to FFmpeg

["Rémi Denis-Courmont via ffmpeg-devel" <ffmpeg-devel@ffmpeg.org>]

Hello,

Le maanantaina 22. syyskuuta 2025, 13.04.40 Itä-Euroopan kesäaika 
harish.rajaselvan--- via ffmpeg-devel a écrit :
> I'm reaching out regarding ARM64EC support for FFmpeg on Windows.

I don't really see the point. There is no use case for FFmpeg proper (the 
executable) to target ARM64EC, and the use care for libav.* seem flimsy at 
best.

To make matters worse, this would really only serve proprietary software. 
Open-source software should, and most likely can, be recompiled to the normal 
Windows/UEFI variant of the AArch64 ABI. If this was a simple question of 
tweaking build parameters and some macros, that could be acceptable.

But this will constrain the assembler is aggravating. It probably requires 
major changes already, but even if it doesn't, I don't think we should 
constrain future assembler code nor expect developers to support the JIT-
friendly ABI.

> Additionally, I would like to know the point of contact for hosting ARM64EC
> binaries (for example, via btbn or gyan.dev), so that people targeting this
> platform can have access to FFmpeg builds for this target.

I don't think that the community resources should be spent on making those 
builds at all. It looks like that would only benefit proprietary Windows apps 
ISVs. That being the case, they should fund the CI setup and running 
themselves.

-- 
ヅニ-クーモン・レミ
Hagalund ny stad, f.d. Finska republik Nylands



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