Crash when transcoding certain files

When transcoding certain files with the following command line

VLC somefile.mp3 vlc://quit --intf=dummy --no-sout-smem-time-sync --sout='#transcode{acodec=mp3,ab=128,samplerate=44100,channels=2}:std{access=file,mux=dummy,dst=-}' > test.mp3

I get the attached crash report. The crashing thread always shows the same:

0 libavcodec_plugin.dylib 0x05a8b64e av_freep + 14

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