[Libav-user] ffmpeg H.264 decoding

Malik Cissé mc at enciris.com
Tue Nov 20 13:50:23 CET 2012

Carl Eugen, Thanks for the info. This is what I wanted to know.

-----Original Message-----
From: libav-user-bounces at ffmpeg.org [mailto:libav-user-bounces at ffmpeg.org] On Behalf Of Carl Eugen Hoyos
Sent: 20 November 2012 11:12
To: libav-user at ffmpeg.org
Subject: Re: [Libav-user] ffmpeg H.264 decoding

Malik Cissé <mc at ...> writes:

> My question:
> The decoding goes very fast and CPU usage is low.
> Can I guaranty same performance on similar CPU’s?

I may misunderstand the question, but decoding is a deterministic process (if that is what you want to know).
General system load and other factors that are very difficult to foresee in real life of course affect decoding speed.

> Is any Hardware acceleration (mmx, GPU, DXVA, etc) used to decode the 
> frames?

SIMD (mmx) optimizations are hopefully used on CPUs that support it, hardware decoding is only used if you explicitly requested it.

Carl Eugen

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