FFmpeg library not found

[delectate]

hi.

i am on arch and install audacity by

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yaourt -S audacity

version:Audacity ® 1.3.11-beta (Unicode)

but,now it can not load ffmpeg library(libavformat.so.52)

first,i install ffmpeg from AUR,and not work.so i download ffmpeg source and

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./configure --enable-shared

to compile it

still not work,i almost crazy...

how to fix it?

thanks for your reply

[steve]

It's a bit of a pain for us Linux users - you need to use a VERY up to date version of FFMPEG.
Try using a subversion snapshot from here: http://ffmpeg.org/download.html

(I'm currently using 52.36)

[assem046]

I have the same problem on OpenSuse 11.2.
I'm building ffmpeg & audacity both svn but Audacity cannot find the ffmpeg library. And it is in /usr/lib64/

ls -l /usr/lib64/libavformat*
-rw-r--r-- 1 root root 12244422 apr 1 07:56 /usr/lib64/libavformat.a
lrwxrwxrwx 1 root root 22 apr 1 07:56 /usr/lib64/libavformat.so -> libavformat.so.52.60.0
lrwxrwxrwx 1 root root 22 apr 1 07:56 /usr/lib64/libavformat.so.52 -> libavformat.so.52.60.0
-rwxr-xr-x 1 root root 805736 apr 1 07:56 /usr/lib64/libavformat.so.52.60.0

So it seems to be available.

How can this be fixed?

[steve]

You're using the 64 bit version of opensuse?

[assem046]

Yes, I'm using OpenSuse 11.2 x64.

[Gale Andrews]

Please launch Audacity so that it tries to load the FFmpeg libraries, and post the output of Help > Show Log in this thread.

You do need a version of FFmpeg 0.5 or later, but the latest FFmpeg from git has an API change so that match_ext() has been replaced with av_match_ext(). If the log shows "undefined symbol: match_ext", that's the explanation. We've had at least one report of this. FFmpeg from Autumn 2009 will definitely work if your repository has such.

If that's not the reason, then maybe you are compiling Audacity to use a local copy of FFmpeg:
http://bugzilla.audacityteam.org/show_bug.cgi?id=118



Gale

[assem046]

This is the Debug log output when I try to locate the ffmpeg library:

13:22:27: Trying to load FFmpeg libraries
13:22:27: mLibAVFormatPath is not empty, = /usr/lib64/libavformat.so.52. Loading from it.
13:22:27: Loading avformat from /usr/lib64/libavformat.so.52
13:22:27: Importing symbols...
13:22:27: Fout: /usr/lib64/libavformat.so.52: undefined symbol: match_ext
13:22:27: Failed to load symbol match_ext
13:22:27: Trying to load from system paths. File name is libavformat.so.52
13:22:27: Loading avformat from libavformat.so.52
13:22:27: Importing symbols...
13:22:27: Fout: /usr/lib64/libavformat.so.52: undefined symbol: match_ext
13:22:27: Failed to load symbol match_ext
13:22:27: Looking for FFmpeg libraries...
13:22:27: mLibAVFormatPath is not empty, = /usr/lib64/libavformat.so.52
13:22:28: User-specified path = /usr/lib64/libavformat.so.52
13:22:28: User-specified file exists. Success.
13:22:28: Trying to load FFmpeg libraries
13:22:28: mLibAVFormatPath is not empty, = /usr/lib64/libavformat.so.52. Loading from it.
13:22:28: Loading avformat from /usr/lib64/libavformat.so.52
13:22:28: Importing symbols...
13:22:28: Fout: /usr/lib64/libavformat.so.52: undefined symbol: match_ext
13:22:28: Failed to load symbol match_ext
13:22:28: Trying to load from system paths. File name is libavformat.so.52
13:22:28: Loading avformat from libavformat.so.52
13:22:28: Importing symbols...
13:22:28: Fout: /usr/lib64/libavformat.so.52: undefined symbol: match_ext
13:22:28: Failed to load symbol match_ext

[Gale Andrews]

OK. You'll need to install an earlier version of FFmpeg until we can change Audacity so that it recognises av_match_ext() if a very recent FFmpeg version is installed.



Gale

[steve]

FFmpeg from Autumn 2009 will definitely work if your repository has such.

So would that currently be be the recommended version of FFMpeg for Linux?

[Gale Andrews]

FFmpeg from Autumn 2009 will definitely work if your repository has such.

So would that currently be be the recommended version of FFMpeg for Linux?

Either that, or 0.5 from Spring 2009. I've updated the Manual to reflect this.



Gale