Command line used to find this crash:

./afl-fuzz -m 5000 -d -i /home/nico/Vidéos/fuzz -o /home/nico/Vidéos/fuzz_finding /home/nico/prog/gpac_for_fuzz/gpac/bin/gcc/MP4Box -dash 1000 @@

If you can't reproduce a bug outside of afl-fuzz, be sure to set the same
memory limit. The limit used for this fuzzing session was 4.88 GB.

Need a tool to minimize test cases before investigating the crashes or sending
them to a vendor? Check out the afl-tmin that comes with the fuzzer!

Found any cool bugs in open-source tools using afl-fuzz? If yes, please drop
me a mail at <lcamtuf@coredump.cx> once the issues are fixed - I'd love to
add your finds to the gallery at:

  http://lcamtuf.coredump.cx/afl/

Thanks :-)