ffmpeg2theora fails with segmentation fault during encoding

[Karl-Philipp Richter]

A `gdb` backtrace:

    #0 ff_audio_data_free (a=a@entry=0x401398) at /build/buildd/libav-11.2/libavresample/audio_data.c:220
    #1 0x00007ffff55585fc in avresample_close (avr=0x4012f0) at /build/buildd/libav-11.2/libavresample/utils.c:265
    #2 0x0000000000413fa2 in ?? ()
    #3 0x0000000000416646 in ?? ()
    #4 0x00007ffff4877a40 in __libc_start_main (main=0x4145ee, argc=4, argv=0x7fffffffd2e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
        stack_end=0x7fffffffd2d8) at libc-start.c:289
    #5 0x00000000004043c9 in ?? ()

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ffmpeg2theora 0.29.0~git+20140316-3
ProcVersionSignature: Ubuntu 3.19.0-30.33-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 25 18:43:18 2015
InstallationDate: Installed on 2015-09-14 (10 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: ffmpeg2theora
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.