FFmpeg --disable-mmx ?

Reinhard Tartler siretart at tauware.de
Tue Feb 24 07:01:02 UTC 2009


Markus Kienast <mark at trickkiste.at> writes:

> Why would you disable MMX? This part of FFmpeg will only be used, if the
> extension is present anyways. So you would not loose any backwards
> compatibility if you leave it enabled.

what makes you think we do disable?

MMX is only disabled if you build the package with DEB_BUILD_OPTIONS set
to 'noopt':

ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
# Various parts of ffmpeg (and swscale) FTBFS when compiling with -fPIC
# and with mmx code enabled.
  confflags += --disable-optimizations
  confflags += --disable-mmx
endif


this is to aid debugging. Normal users using prepackaged versions of
ffmpeg will never see this.

-- 
Gruesse/greetings,
Reinhard Tartler, KeyID 945348A4



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