mpeg-ts sample fails immediately after successful probing

[cehoyos]

Attached is the beginning of a dvb-recording: It is correctly auto-detected as mpeg-ts (score 98), but ffmpeg quits immediately after the detection. The sample is read fine if I cut away the first 148 bytes.
Plays fine with vlc, the problem is also reproducible with MPlayer.

ffmpeg -v 9 -loglevel 99 -i recording.ts
FFmpeg version git-N-29185-g25347c8, Copyright (c) 2000-2011 the FFmpeg developers
  built on Apr 19 2011 10:49:09 with gcc 4.5.2
  configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl --enable-libvorbis
  libavutil    50. 40. 1 / 50. 40. 1
  libavcodec   52.120. 0 / 52.120. 0
  libavformat  52.108. 0 / 52.108. 0
  libavdevice  52.  4. 0 / 52.  4. 0
  libavfilter   1. 79. 0 /  1. 79. 0
  libswscale    0. 13. 0 /  0. 13. 0
[NULL @ 0x128e660] mpegts: Probed with size=32768 and score=98
recording.ts: Operation not permitted

[reimar]

Fix finally pushed. It's still possible to construct files that fail, ideally the code should be changed to find the TS packet size as long as necessary, but that might be overkill.