Sound Waveform Display
Troubleshoot
Blender Freeze for a while
Blender freeze while the ffmpeg command is running, it's normal and should happen only during the generation of the waveform.
The process is slow, the addon is meant to be used on shorts time ranges, few seconds to 1min max.
If the range is longer than 1 minutes, it will take a long while to generate.
Permission denied
If you have an error popup stating "permission denied Error" in the last lines, it means ffmpeg binary do not have permission to execute.
You need to add execution rights.
Right-click on the file > Properties > Find the permission category and check allow execution.
If you're on Mac or Linux you can also copy the full path to the ffmpeg bin, open a terminal and use the following command:
chmod +x "/path/to/ffmpeg"