regression: transport stream is not autodetected

[Carl Eugen Hoyos]

​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket3182/
The transport stream from ticket #3182 is not autodetected anymore since 427bcdf0
Related to ticket #3844.

$ ffmpeg -i ntd_gap_sound.ts
ffmpeg version N-66222-g1b5ccae Copyright (c) 2000-2014 the FFmpeg developers
  built on Sep 10 2014 09:36:41 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[mpeg @ 0x2b69b20] Format mpeg detected only with low score of 25, misdetection possible!
Input #0, mpeg, from 'ntd_gap_sound.ts':
  Duration: 00:01:08.25, start: 50432.154678, bitrate: 4008 kb/s
    Stream #0:0[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
At least one output file must be specified

[Michael Niedermayer]

Fixed in 296cd9c432775bbf57867fd76e8d2f505a512569