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[Bug]: Can't open m4a files, ffmpeg is missing #53

@Rafbor42

Description

@Rafbor42

What happened?

Hi,
when I try to open an m4a file, I get a message saying that the file format is incorrect and that I need to install ffmpeg.
According to this closed issue, ffmpeg libraries are now integrated in the package. Why aren't they being seen?

    find /snap/audacity/1187 -iname *libavformat.so*
    /snap/audacity/1187/usr/lib/x86_64-linux-gnu/libavformat.so.60
    /snap/audacity/1187/usr/lib/x86_64-linux-gnu/libavformat.so.60.16.100

What should have happened?

The app should use the ffmpeg libraries to open the m4a file.

Output of snap info $snap_name

$ snap info audacity
name:      audacity
summary:   Audacity is the world's most popular audio editing and recording app
publisher: Snapcrafters✪
store-url: https://snapcraft.io/audacity
contact:   https://github.com/snapcrafters/audacity/issues
license:   MIT
description: |
  Audacity® is a free, easy-to-use, multi-track audio editor and recorder for Windows,
  Mac OS X, GNU/Linux and other operating systems. The interface is translated into
  many languages.
  
  You can use Audacity to:
  * Record live audio
  * Convert tapes and records into digital recordings or CDs
  * Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files
  * Cut, copy, splice or mix sounds together
  * Change the speed or pitch of a recording
  * Apply a wide range of other effects to audio recordings
commands:
  - audacity
snap-id:      KTe2wdAu5JKdRDUgYBuXXGjDXyzobvFI
tracking:     latest/stable
refresh-date: aujourd'hui à 14h22, heure des Rocheuses
channels:
  latest/stable:    3.7.1 2025-05-30 (1187) 203MB -
  latest/candidate: 3.7.1 2025-06-02 (1192) 641MB -
  latest/beta:      ↑                             
  latest/edge:      3.7.1 2025-06-02 (1194) 641MB -
installed:          3.7.1            (1187) 203MB -

Output of snap connections $snap_name

$ snap connections audacity
Interface               Connecteur                Prise                           Notes
alsa                    audacity:alsa             :alsa                           manual
audio-playback          audacity:audio-playback   :audio-playback                 -
audio-record            audacity:audio-record     -                               -
content[gnome-46-2404]  audacity:gnome-46-2404    gnome-46-2404:gnome-46-2404     -
content[gpu-2404]       audacity:gpu-2404         mesa-2404:gpu-2404              -
content[gtk-3-themes]   audacity:gtk-3-themes     gtk-common-themes:gtk-3-themes  -
content[icon-themes]    audacity:icon-themes      gtk-common-themes:icon-themes   -
content[sound-themes]   audacity:sound-themes     gtk-common-themes:sound-themes  -
desktop                 audacity:desktop          :desktop                        -
desktop-legacy          audacity:desktop-legacy   :desktop-legacy                 -
gsettings               audacity:gsettings        :gsettings                      -
home                    audacity:home             :home                           -
jack1                   audacity:jack1            -                               -
network                 audacity:network          :network                        -
network-bind            audacity:network-bind     :network-bind                   -
opengl                  audacity:opengl           :opengl                         -
pulseaudio              audacity:pulseaudio       :pulseaudio                     -
removable-media         audacity:removable-media  -                               -
unity7                  audacity:unity7           :unity7                         -
wayland                 audacity:wayland          :wayland                        -
x11                     audacity:x11              :x11                            -

Output of snap version

$ snap version
snap    2.68.4
snapd   2.68.4
series  16
ubuntu  24.04
kernel  6.11.0-26-generic

Relevant log output

Teminal output of app

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