[Libreoffice-bugs] [Bug 62408] MP4 videos aren't handled in Windows ( without additional codecs)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=62408

--- Comment #41 from Michael Stahl <mstahl at redhat.com> ---
apparently we just do a single call from avmedia::win::Player::create() that
takes the URL and automagically sets up all the needed filters:

    if( SUCCEEDED( hR = mpGB->RenderFile( o3tl::toW(rURL.getStr()), nullptr ) )
&&

IGraphBuilder::RenderFile

https://msdn.microsoft.com/en-us/library/windows/desktop/dd390090(v=vs.85).aspx

why this wouldn't recognize "DMO" filters automatically,
and how to add that manually, isn't obvious to me.

https://msdn.microsoft.com/en-us/library/windows/desktop/dd407173(v=vs.85).aspx

... but MSDN says that various MPEG-4 formats and AAC/H264 are supported in
DirectShow?


https://msdn.microsoft.com/en-us/library/windows/desktop/bb970511(v=vs.85).aspx

apparently this "Media Foundation" API is available since Vista, so with our
current baseline of Windows 7 it would be possible to replace the DirectShow
avmedia component with a Media Foundation one, in case some volunteer can be
found for the task.

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