ffplay fails to seek

[ami_stuff]

I wanted to investigate ticket #296, but found out that ffplay is unable to seek in the attached file to certain durations while ffmpeg have no problem to do so (ffmpeg -ss 10 -i keyframe_every_100_frames.avi out.avi).

(the same problem is reproducible while seeking with the mouse).

 http://www.datafilehost.com/download-1286e616.html

C:\>ffplay -noframedrop -ss 10 keyframe_every_100_frames.avi
ffplay version N-46469-gc995644 Copyright (c) 2003-2012 the FFmpeg developers
  built on Nov  5 2012 17:54:28 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass -
-enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
ble-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[mpeg4 @ 02af60a0] Invalid and inefficient vfw-avi packed B frames detected
Input #0, avi, from 'keyframe_every_100_frames.avi':
  Duration: 00:01:33.30, start: 0.000000, bitrate: 268 kb/s
    Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv
420p, 352x240 [SAR 1:1 DAR 22:15], 20 tbr, 20 tbn, 20 tbc
[mpeg4 @ 02af60a0] Invalid and inefficient vfw-avi packed B frames detected
    Last message repeated 1 times
Frame changed from size:0x0 to size:352x240
   2.19 A-V:  0.000 fd=   0 aq=    0KB vq=   39KB sq=    0B f=0/0