Revisiting MPlayers PostProcessing filter

Alexander E. Patrakov patrakov at ums.usu.ru
Sat Dec 25 06:49:53 PST 2004


Randy McMurchy wrote:

> Hi all,
> 
> Merry Christmas!
> 
> Here is a bug which prompted a change to the MPlayer instructions
> to pull out the creation and installation of the shared postprocessing
> library:
> 
> ==============Begin Bug================
> http://blfs-bugs.linuxfromscratch.org/show_bug.cgi?id=1049
> 
>             Summary: --enable-shared-pp should not be used.
>             Product: Beyond LinuxFromScratch
>             Version: SVN
>            Platform: PC
>                 URL: http://lfs.netservice-
>                      neuss.de/blfs/view/svn/multimedia/mplayer.html
>          OS/Version: Linux
>              Status: NEW
>            Severity: minor
>            Priority: P2
>           Component: BOOK
>          AssignedTo: blfs-book at linuxfromscratch.org
>          ReportedBy: Reimar.Doeffinger at stud.uni-karlsruhe.de
>           QAContact: blfs-book at linuxfromscratch.org
> 
> 
> I think there was a misunderstanding as to what --enable-shared-pp does.
> It just makes MPlayer compile and link to the postprocessing library
> dynamically instead of statically. The functionality will always be
> compiled in. As dynamic linking often causes problems, this switch should
> not be used. Also, it is recommended to install all codecs always into
> /usr/lib/codecs. Like this, it will also be recognized automatically and
> MPlayer will compile with codecs support, the --with-codecsdir is not
> necessary in that case. Would be nice if you could do these changes.
> ==============End Bug================
> 
> I think users should be made aware of MPlayer's shared postprocessing
> library, mainly because it is looked for by other packages (transcode,
> FFDShow and others). Now I don't necessarily agree with the statement
> above "dynamic linking often causes problems", especially with MPlayer's
> postprocessing library. But I digress....
> 
> I am updating BLFS to MPlayer-1.0pre6 and think that maybe I should put
> a blurb in the instructions that passing --enable-shared-pp is necessary
> to build the shared library, and then put optional instructions to build
> and install the library.
> 
> What say the group?
> 
I remember that VLC player doesn't like MPlayer's shared library and insists
in either not having it at all or using the one from ffmpeg.

-- 
Alexander E. Patrakov



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