(gdb) r -i ~/Downloads/streetvendors.mp4 -vf subtitles=/Users/cbsrobot/Desktop/streetvendors.srt -c:v libx264 -c:a copy ~/Desktop/streetvendors.mp4
Starting program: /Users/cbsrobot/devel/ffmpeg/ffmpeg_g -i ~/Downloads/streetvendors.mp4 -vf subtitles=/Users/cbsrobot/Desktop/streetvendors.srt -c:v libx264 -c:a copy ~/Desktop/streetvendors.mp4
Reading symbols for shared libraries +++++++++++++++++++++++++++++++........................................................................................................................................... done
ffmpeg version N-47442-ge8262d5 Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec  4 2012 21:41:21 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libvpx --enable-libmp3lame --enable-libfreetype --enable-libopenjpeg --enable-libass --enable-libfdk-aac --enable-libvo-aacenc --enable-libopus --enable-libschroedinger --enable-libspeex --enable-openssl --enable-libaacplus --enable-libcelt --enable-libfreetype --enable-fontconfig --prefix=/usr/local
  libavutil      52. 11.101 / 52. 11.101
  libavcodec     54. 79.100 / 54. 79.100
  libavformat    54. 44.100 / 54. 44.100
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 24.100 /  3. 24.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/cbsrobot/Downloads/streetvendors.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2012-09-15 20:21:17
  Duration: 00:06:46.04, start: 0.000000, bitrate: 2449 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2254 kb/s, 25 fps, 25 tbr, 50 tbn, 50 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 191 kb/s
    Metadata:
      creation_time   : 2012-09-15 20:21:17
      handler_name    : IsoMedia File Produced by Google, 5-11-2011
File '/Users/cbsrobot/Desktop/streetvendors.mp4' already exists. Overwrite ? [y/N] y
Estimating duration from bitrate, this may be inaccurate

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
av_opt_next [inlined] () at /Users/cbsrobot/devel/ffmpeg/libavutil/opt.c:64
64	    if (!last && class->option && class->option[0].name)
(gdb) bt
#0  av_opt_next [inlined] () at /Users/cbsrobot/devel/ffmpeg/libavutil/opt.c:64
#1  0x00000001006568d1 in av_opt_free (obj=0x102080e00) at opt.c:1068
#2  0xe000000000000000 in ?? ()
(gdb) disass $pc-32,$pc+32
Dump of assembler code for function av_opt_free:
0x00000001006568a0 <av_opt_free+0>:	push   %r14
0x00000001006568a2 <av_opt_free+2>:	push   %rbx
0x00000001006568a3 <av_opt_free+3>:	sub    $0x8,%rsp
0x00000001006568a7 <av_opt_free+7>:	xor    %ebx,%ebx
0x00000001006568a9 <av_opt_free+9>:	mov    %rdi,%r14
0x00000001006568ac <av_opt_free+12>:	jmp    0x1006568c9 <av_opt_free+41>
0x00000001006568ae <av_opt_free+14>:	xchg   %ax,%ax
0x00000001006568b0 <av_opt_free+16>:	mov    0x14(%rbx),%eax
0x00000001006568b3 <av_opt_free+19>:	cmp    $0x5,%eax
0x00000001006568b6 <av_opt_free+22>:	je     0x1006568bd <av_opt_free+29>
0x00000001006568b8 <av_opt_free+24>:	cmp    $0x7,%eax
0x00000001006568bb <av_opt_free+27>:	jne    0x1006568c9 <av_opt_free+41>
0x00000001006568bd <av_opt_free+29>:	movslq 0x10(%rbx),%rdi
0x00000001006568c1 <av_opt_free+33>:	add    %r14,%rdi
0x00000001006568c4 <av_opt_free+36>:	callq  0x100655310 <av_freep>
0x00000001006568c9 <av_opt_free+41>:	test   %rbx,%rbx
0x00000001006568cc <av_opt_free+44>:	jne    0x1006568e9 <av_opt_next+27>
0x00000001006568ce <av_opt_next+0>:	mov    (%r14),%rbx
0x00000001006568d1 <av_opt_next+3>:	mov    0x10(%rbx),%rax
0x00000001006568d5 <av_opt_next+7>:	test   %rax,%rax
0x00000001006568d8 <av_opt_next+10>:	je     0x1006568f9 <av_opt_free+89>
0x00000001006568da <av_opt_next+12>:	cmpq   $0x0,(%rax)
0x00000001006568de <av_opt_next+16>:	mov    $0x0,%ebx
0x00000001006568e3 <av_opt_next+21>:	cmovne %rax,%rbx
0x00000001006568e7 <av_opt_next+25>:	jmp    0x1006568f4 <av_opt_free+84>
0x00000001006568e9 <av_opt_next+27>:	cmpq   $0x0,0x40(%rbx)
0x00000001006568ee <av_opt_next+32>:	je     0x1006568f9 <av_opt_free+89>
0x00000001006568f0 <av_opt_next+34>:	add    $0x40,%rbx
0x00000001006568f4 <av_opt_free+84>:	test   %rbx,%rbx
0x00000001006568f7 <av_opt_free+87>:	jne    0x1006568b0 <av_opt_free+16>
0x00000001006568f9 <av_opt_free+89>:	add    $0x8,%rsp
0x00000001006568fd <av_opt_free+93>:	pop    %rbx
0x00000001006568fe <av_opt_free+94>:	pop    %r14
0x0000000100656900 <av_opt_free+96>:	retq
End of assembler dump.
(gdb)