[FFmpeg-devel] [PATCH v2] Add MediaFoundation wrapper

[wm4]

On Tue, 4 Apr 2017 12:34:56 -0300
James Almer <jamrial at gmail.com> wrote:

> On 4/4/2017 2:45 AM, wm4 wrote:
> > Can do audio decoding, audio encoding, video decoding, video encoding,
> > video HW encoding. I also had video HW decoding, but removed it for now,
> > as thw hwframes integration wasn't very sane.
> > 
> > Some of the MS codecs aren't well tested, and might not work properly.
> > ---
> > Didn't actually test compilation again, but should be fine.  
> 
> I'm getting a lot of warnings during linking, using mingw-w64.
> 
> LD      ffmpeg_g.exe
> libavcodec/libavcodec.a(mf.o): warning: common of `GUID_NULL' overridden by definition
> ffmpeg_dxva2.o: warning: defined here
> libavcodec/libavcodec.a(mf_utils.o): warning: multiple common of `CODECAPI_CURRENTCHANGELIST'
> libavcodec/libavcodec.a(mf.o): warning: previous common is here

Apparently happens only when statically linking?

This kind of stuff seems to happen often with Windows and GUID
definitions, but I don't remember what the solution was.