imagination doesn't write VOB file

This is the same bug as 146613

ivan@Ivan:~$ lsb_release -rd
Description: Ubuntu 15.04
Release: 15.04

ivan@Ivan:~$ lsb_release -rd
Description: Ubuntu 15.04
Release: 15.04
ivan@Ivan:~$ apt-cache policy imagination
imagination:
  Installed: 3.0-5ubuntu1
  Candidate: 3.0-5ubuntu1
  Version table:
 *** 3.0-5ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
        500 http://au.archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
        100 /var/lib/dpkg/status

From the terminal:
ivan@Ivan:~$ imagination
avconv version 11.2-6:11.2-1, Copyright (c) 2000-2014 the Libav developers
  built on Jan 18 2015 05:12:33 with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu2)
[image2pipe @ 0x1fc7bc0] Estimating duration from bitrate, this may be inaccurate
Input #0, image2pipe, from 'pipe:':
  Duration: N/A, bitrate: N/A
    Stream #0.0: Video: ppm, rgb24, 720x576, 25 fps, 25 tbn
[flac @ 0x1fe7fa0] max_analyze_duration 5000000 reached
Input #1, flac, from '/tmp/img_audio_fifo':
  Duration: 00:48:01.31, bitrate: N/A
    Stream #1.0: Audio: flac, 44100 Hz, stereo, s16
[setdar @ 0x1fc7ae0] This syntax is deprecated, use dar=<number> or dar=num/den.
[mpeg2video @ 0x27aed60] ignoring invalid SAR: 4294967280/13
[dvd @ 0x27adfa0] Aspect ratio mismatch between muxer (-16/13) and encoder layer (0/1)
Output #0, dvd, to '/home/ivan/Desktop/photos/tham_ivan_July2015.vob':
    Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=2-31, 6000 kb/s, PAR -16:13 DAR -20:13, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder : Lavc56.1.0 mpeg2video
    Stream #0.1: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s
    Metadata:
      encoder : Lavc56.1.0 ac3
Stream mapping:
  Stream #0:0 -> #0:0 (ppm (native) -> mpeg2video (native))
  Stream #1:0 -> #0:1 (flac (native) -> ac3 (native))
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

From the Messages tab:
Testing avconv abilities with "avconv -filters" ... setdar found!
Running avconv -f image2pipe -vcodec ppm -r 25 -i pipe: -f flac -i /tmp/img_audio_fifo -y -bf 2 -target pal-dvd -s 720x576 -vf setdar=4:3 "/home/ivan/Desktop/photos/tham_ivan_July2015.vob"