help building vlc with static ffmpeg

[squindler]

Hey All,

I'm attempting to build vlc against a static build of ffmpeg however ./configure keeps erroring out not being able to find libavcodec.a.

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FFmpeg version SVN-r10258, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-decoder=dnxhd --prefix=/opt/local/ffmpeg --enable-pp --enable-gpl

I'm trying to build 0.8.6c using:

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./configure --prefix=/opt/local/vlc-0.8.6c --enable-shared=no --enable-static=yes --with-ffmpeg-tree=/opt/local/ffmpeg --with-ffmpeg-config-path=/opt/local/ffmpeg/

which errors with:

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checking for libavcodec.a in /opt/local/ffmpeg... no configure: error: cannot find /opt/local/ffmpeg/libavcodec/libavcodec.a, make sure you compiled libavcodec in /opt/local/ffmpeg

libavcodec.a can however be found @ /opt/local/ffmpeg/lib/libavcodec.a

I tried a few other options like FFMPEG_LIBS=/opt/local/ffmpeg but that was equally un-successful.

Any help greatly appreciated.
Shane.

[kmf31]

When you use: "--with-ffmpeg-tree=..." you should not use the installation directory of ffmpeg in your system but the source directory where you have previously compiled ffmpeg (with static libraries and not only shared libraries), for example:

./configure .... --with-ffmpeg-tree=/home/toto/ffmpeg_source/ ...

where /home/toto/ffmpeg_source/ is the source directory of ffmpeg which you should have compiled with "--enable-static" (which is actually the default anyway, simply don't use "--disable-static", that is enough).

In this way you don't even need to do the "make install" of ffmpeg because vlc will directly use the static ffmpeg-library for its plugins and will never search the dynamic versions in /opt/blabla/...

If you have a 64bit Linux version it is possible that you need also to specify "--with-pic" in the ./configure of vlc and somehow "-fPIC" as gcc-compiler option when compiling ffmpeg.

[squindler]

awesome! Thankyou kmf31!! ...in hindsight I probably should have guessed that a *-tree option was referring to source and not install path, though at same time it'd be handy for configure output to make it clear too.

Now that thats working I have a problem that VLC doesn't seem to be able to use all the codecs ffmpeg can - specifically the Avid DNxHD codec. The build of ffmpeg I'm building VLC against can read the file and can convert it to jpegs for me, but VLC errors out with:

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[00000476] main decoder error: no suitable decoder module for fourcc `AVdn'. VLC probably does not support this sound or video format.

I had similar / same issue with xine ...though thats probably no help here.

[Jean-Baptiste Kempf]

@squindler: do you have samples?