1 Install FFmpeg and add some audio to the project. 2 File > Export Audio..., choose "Custom FFmpeg Export", click "Options...". 3 Select a format and a codec, for example, WAV and pcm_alaw. 4 Type a name for the preset in the "Preset:" box. 5 Press "Save Preset". This does not yet write the preset to disk. 6 Press "Delete Preset" and confirm deletion. Crash. 7 Restart Audacity. Repeat steps 3, 4 and 5 then press OK. This saves the preset to "ffmpeg_presets.xml" in Audacity's application data folder. 8 Reopen the Custom FFmpeg Export dialogue, and select the preset you saved from the Preset: drop-down. Press "Delete Preset" and confirm deletion. Crash. No deletion of the preset on disk occurs. 9 Restart Audacity and reopen the Custom FFmpeg Export dialogue. Select the preset you saved from the Preset: drop-down. Press "Load Preset" then "Delete Preset" and confirm deletion. Still crashes. 10 Restart Audacity and reopen the Custom FFmpeg Export dialogue. Select the preset you saved from the Preset: drop-down. Press "Export Presets" and save the XML file. 11 Press "Import Presets" and select and open the saved XML file. This would add an identical preset, but it crashes. 12 If you export and import a different preset than one already in the saved list, it also crashes. The only time the import does not crash is if the "ffmpeg_presets" file is empty or does not exist.

// See bug 896