Transcode assert failure: *** Error in `transcode': free(): invalid pointer: 0x00007f6afc9f1775 ***

Transcode assert failure: *** Error in `transcode': free(): invalid pointer: 0x00007f6afc9f1775 ***

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: transcode 3:1.1.7-4
ProcVersionSignature: Ubuntu 3.8.0-35.50-generic 3.8.13.13
Uname: Linux 3.8.0-35-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
AssertionMessage: *** Error in `transcode': free(): invalid pointer: 0x00007f6afc9f1775 ***
Date: Sat Mar 22 12:25:02 2014
ExecutablePath: /usr/bin/transcode
InstallationDate: Installed on 2013-07-13 (251 days ago)
InstallationMedia: Ubuntu 13.04 "" - Release amd64 (20130428)
MarkForUpload: True
ProcCmdline: transcode -H 10 -a 0 -x vob,null -i /home/username/dvdrip-data/unnamed/vob/003/ -w 2482,50 -F mpeg4 -b 320,0,2 -s 2.560 --a52_drc_off -f 30,4 -Y 4,16,4,16 -B 9,6,8 -R 1 -y ffmpeg,null -o /dev/null --progress_meter 2 --progress_rate 25
Signal: 6
SourcePackage: transcode
StacktraceTop:
 __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f6b0f1ca440 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
 malloc_printerr (ptr=0x7f6afc9f1775, str=0x7f6b0f1c6405 "free(): invalid pointer", action=3) at malloc.c:4923
 _int_free (av=<optimized out>, p=0x7f6afc9f1765, have_lock=0) at malloc.c:3779
 av_freep () from /usr/lib/x86_64-linux-gnu/libavutil.so.51
 av_opt_free () from /usr/lib/x86_64-linux-gnu/libavutil.so.51
Title: transcode assert failure: *** Error in `transcode': free(): invalid pointer: 0x00007f6afc9f1775 ***
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout dip fax floppy fuse lpadmin plugdev sambashare tape video