Score:0

Ubuntu

ffmpeg undefined symbol: mpg123_param2 on

Chris Bare

10/19/23, 7:10 PM

I have a freshly installed Ubuntu 22.04.1 LTS system and ffmpeg does not run:

$ ffmpeg -version
ffmpeg: symbol lookup error: /lib/x86_64-linux-gnu/libopenmpt.so.0: undefined symbol: mpg123_param2

I have the following installed:

$ dpkg -l | grep mpg
ii  libmpg123-0:amd64                          1.29.3-1build1                          amd64        MPEG layer 1/2/3 audio decoder (shared library)
ii  mpg123

I also have another system that has been upgraded many times where ffmpeg works. It has the same version of libmpg123 and I compared the checksum on the libmpg123.so.0.46.7 on both systems and they match.

I have tried removing ffmpeg and the dependencies that were no longer needed, then reinstalling, but it made no difference.

Is there another library I need to install? Any other suggestions?

Thanks for your time. Chris

437

0 + 10

ffmpeg

abu_bua

10/19/23, 7:14 PM

Please post the following command output : `ldd /usr/bin/ffmpeg | grep libopenmpt` . If you find no link install the lib with `sudo apt install libopenmpt0` . Otherwise run `ldd /usr/bin/ffmpeg ` and look for not installed libs.

abu_bua

10/19/23, 7:20 PM

Did you installed the libmpg123 ?

Chris Bare

10/19/23, 7:52 PM

$ ldd /usr/bin/ffmpeg | grep libopenmpt libopenmpt.so.0 => /lib/x86_64-linux-gnu/libopenmpt.so.0 (0x00007fafa8c51000) ldd shows no missing libraries. $ dpkg -l libmpg123-0 ||/ Name Version Architecture Description +++-=================-==============-============-=============================================== ii libmpg123-0:amd64 1.29.3-1build1 amd64 MPEG layer 1/2/3 audio decoder (shared library)

Chris Bare

10/19/23, 7:58 PM

`$ ldd /usr/bin/ffmpeg | grep libopenmpt` `libopenmpt.so.0 => /lib/x86_64-linux-gnu/libopenmpt.so.0 (0x00007fafa8c51000)` ldd shows no missing libraries. `$ dpkg -l libmpg123-0` `||/ Name Version Architecture Description` `+++-=================-==============-============-===============================================` `ii libmpg123-0:amd64 1.29.3-1build1 amd64 MPEG layer 1/2/3 audio decoder (shared library)`

nobody

10/19/23, 8:06 PM

`whereis ffmpeg` please

abu_bua

10/19/23, 8:14 PM

Do you have a locally compiled library of libopenmpt ? Maybe you can try `sudo apt install --reinstall libopenmpt0` . Maybe a `sudo ldconfig` does the job ?

abu_bua

10/19/23, 8:22 PM

Sometimes you have to reinstall ffmepg. But first clean your apt cache (this will delete all locally apt packages in the /var/cache/apt/archives ) - which is safe `sudo apt clean` . Uninstall ffmpeg with `sudo remove ffmpeg libopenmpt0` and try to install it again with `sudo install ffmpeg` .

Chris Bare

10/20/23, 12:02 AM

I did what you suggested, but I still see the same problem. I also noticed that mpg123 won't run, giving this error `mpg123: symbol lookup error: mpg123: undefined symbol: mpg123_par2` ldd does not show any missing libs for mpg123

abu_bua

10/20/23, 1:18 AM

Looks like they didn't updated the libopenmpt0. You can compile it by source or make a bug report. I think the problem is that they forgot to link the correct library This is very strange in my opinion. Bug report: https://launchpad.net/ubuntu/+source/ffmpeg

abu_bua

10/20/23, 1:24 AM

`which ffmpeg` or `whereis ffmpeg` shows you the path which should be /usr/bin/ffmpeg`

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: ffmpeg undefined symbol: mpg123_param2 on

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