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I am using Mathematica 15.0 on Linux Mint. Importing MP4 files fails. If I check with the following code

TracePrint[$VideoEncoders // Keys, 
 r : LibraryLoad[s_String] /; FailureQ[r] :> {s, 
   LibraryLink`$LibraryError}, TraceInternal -> True]

And see a problem with librabbitmq

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  • $\begingroup$ On Pop!_OS 24.04 LTS MP4 import works fine in 15.0.0. $\endgroup$ Commented yesterday
  • $\begingroup$ Good to know, I thought about changing to another Debian based distro. Unfortunately I have another Debian System with the equivalent Problem. From what I see it depends if ffmpeg is build with AMQP/RabbitMQ support or not. Maybe the distro choose different packages and therefor the problem does not appear everywhere ... $\endgroup$ Commented 17 hours ago

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The import of some MP4 in Mathematica failed because the Wolfram-shipped libssl.so.3 and libcrypto.so.3 conflicted with the system FFmpeg dependency chain, especially librabbitmq.so.4, causing errors such as undefined symbol: ENGINE\_load\_private\_key, version OPENSSL\_3.0.0. Renaming the Wolfram OpenSSL libraries allowed FFmpeg import to work, but then Wolfram server login stopped working. The effective workaround was to build a minimal custom FFmpeg 8.1.1 with shared libraries enabled, networking disabled, no AMQP/RabbitMQ support, and only the required MP4/H.264/AAC components. Mathematica was then started with the custom FFmpeg library directory prepended to LD\_LIBRARY\_PATH, for example LD\_LIBRARY\_PATH="\\\$HOME/ffmpeg\_build/lib\\\${LD\_LIBRARY\_PATH:+:\\\$LD\_LIBRARY\_PATH}" WolframNB. With this setup, both video import and Wolfram server login worked correctly. The essential point is that FFmpegToolsSystem-8.1.1.so could resolve against compatible custom libav\* shared libraries while avoiding the problematic RabbitMQ/OpenSSL conflict.

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