av_open_input_file fails open - regression

[DonMoir]

I have 4 f4v files. 3 of them fail on open with the latest build.

To test, fails_open_cut.f4v (8 MB) is here:

​http://sms.pangolin.com/temp/fails_open_cut.f4v

Attempting to cut the file smaller resulted in failure on older builds.

The last known good on this file and others is:

ffplay version N-32962-gcbf914c, Copyright (c) 2003-2011 the FFmpeg developers

built on Sep 25 2011 21:37:29 with gcc 4.6.1
configuration: --disable-static --enable-shared --enable-gpl

--enable-version3 --enable-runtime-cpudetect --enable-avisynth
--enable-bzlib --enable-frei0r --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libfreetype
--enable-libgsm --enable-libmp3lame --enable-libopenjpeg
--enable-librtmp --enable-libschroedinger --enable-libspeex
--enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libx264
--enable-libxavs --enable-libxvid --enable-zlib

libavutil 51. 17. 0 / 51. 17. 0
libavcodec 53. 17. 0 / 53. 17. 0
libavformat 53. 13. 0 / 53. 13. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 43. 5 / 2. 43. 5
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

With Latest Build:

gdb ffmpeg_g
(gdb) r -i c:\flashfiles\fails_open_cut.f4v -f null -
Starting program: c:\work\ffmpeg_deb/ffmpeg_g.exe -i c:\flashfiles\fails_open_cut.f4v -f null -
[New Thread 3768.0x177c]
ffmpeg version 0.8.5.git, Copyright (c) 2000-2011 the FFmpeg developers

built on Oct 21 2011 13:20:54 with gcc 4.5.2
configuration: --target-os=mingw32 --disable-yasm --disable-doc
libavutil 51. 22. 0 / 51. 22. 0
libavcodec 53. 23. 0 / 53. 23. 0
libavformat 53. 17. 0 / 53. 17. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 44. 1 / 2. 44. 1
libswscale 2. 1. 0 / 2. 1. 0

[mov,mp4,m4a,3gp,3g2,mj2 @ 03549f60] error reading header: -1
c:\flashfiles\fails_open_cut.f4v: Operation not permitted

Program exited with code 01.
(gdb) disass $pc-32,$pc+32
No registers.