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Editorial Team
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Asked: 2026-06-01T23:38:01+00:00

I am using ffmpeg on Mac OSX 10.7.3 in MAMP through PHP’s exec() command,

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I am using ffmpeg on Mac OSX 10.7.3 in MAMP through PHP’s exec() command, I have an absolute path set to call ffmpeg, e.g.

/opt/local/bin/ffmpeg -i "/sample.avi"

But I receive the following error –

dyld: Library not loaded: /opt/local/lib/libjpeg.8.dylib  Referenced from: /opt/local/lib/libopenjpeg.1.dylib  Reason: Incompatible library version: libopenjpeg.1.dylib requires version 13.0.0 or later, but libJPEG.dylib provides version 12.0.0

N.B. ffmpeg was installed through Macports.

It works from the command line.

What to do?

EDIT

I’ve reopened this – originally thought shell_exec() solved the issue, but infact it should be called differently – and I didn’t realise until investigating further today. Here is my code using shell_exec and still giving the error above:

 $cmd = '/opt/local/bin/ffmpeg -h';
 $cmd = escapeshellcmd($cmd) . ' 2>&1';
 $output = shell_exec($cmd);
 var_dump($output);
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1 Answer

  1. Editorial Team

    The problem is that the DYLD_LIBRARY_PATH is set in MAMP and I’ve installed ffmpeg via macports.

    This might not be the best fix but it has me up and running for now:

    In the /Applications/MAMP/Library/bin/envvars file and comment the following lines as below:

    #DYLD_LIBRARY_PATH="/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"
#export DYLD_LIBRARY_PATH

    and restart Apache

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