Crash when opening directory with Dolphin

[nschlia]

Happens probably always when transcoding a video to audio only. When destformat is set to mp3 and the input format contains a video, the application simply crashes. Actually a audio only file should be created, video just discarded.

[nschlia]

To reproduce:
Mount directory with destination type mp3, source directory with videos. Open mount with Dolphin -> core dump.
Doing a "cp *" works.

[nschlia]

Actually not a problem with video sources. Happens when transcoding audio only, too. Reproducible with

• Mount directory with destination type mp3. Open mount with Dolphin -> core dump.
• Doing a "cp *" works.

Causes heap corruptions and double free messages.

[nschlia]

Happens with mp3 only, WAV, AIFF and Opus cause no problems.