% ffprobe tmp/rangetest2.flv
ffprobe version 2.0.1-tessus Copyright (c) 2007-2013 the FFmpeg developers
  built on Aug 10 2013 21:25:56 with llvm-gcc 4.2.1 (LLVM build 2336.1.00)
  configuration: --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus --enable-fontconfig --enable-libfreetype --enable-libass --enable-libbluray --enable-filters --enable-runtime-cpudetect
  libavutil      52. 38.100 / 52. 38.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.100 / 55. 12.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 79.101 /  3. 79.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[h264 @ 0x102014600] no frame!
    Last message repeated 133 times
[h264 @ 0x102014600] non-existing PPS 1 referenced
[h264 @ 0x102014600] decode_slice_header error
[h264 @ 0x102014600] no frame!
    Last message repeated 16 times
[h264 @ 0x102014600] non-existing SPS 0 referenced in buffering period
[h264 @ 0x102014600] no frame!
[flv @ 0x10200c000] decoding for stream 0 failed
[flv @ 0x10200c000] Could not find codec parameters for stream 0 (Video: h264): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, flv, from 'tmp/rangetest2.flv':
  Duration: 00:20:32.23, start: 1218.614000, bitrate: 5 kb/s
    Stream #0:0: Video: h264, 30 tbr, 1k tbn, 2k tbc
    Stream #0:1: Audio: aac, 44100 Hz, mono, fltp
% ffmpeg -i tmp/rangetest2.flv -vcodec copy -acodec copy tmp/rangetest2.mp4
ffmpeg version 2.0.1-tessus Copyright (c) 2000-2013 the FFmpeg developers
  built on Aug 10 2013 21:25:56 with llvm-gcc 4.2.1 (LLVM build 2336.1.00)
  configuration: --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus --enable-fontconfig --enable-libfreetype --enable-libass --enable-libbluray --enable-filters --enable-runtime-cpudetect
  libavutil      52. 38.100 / 52. 38.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.100 / 55. 12.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 79.101 /  3. 79.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[h264 @ 0x102020c00] no frame!
    Last message repeated 133 times
[h264 @ 0x102020c00] non-existing PPS 1 referenced
[h264 @ 0x102020c00] decode_slice_header error
[h264 @ 0x102020c00] no frame!
    Last message repeated 16 times
[h264 @ 0x102020c00] non-existing SPS 0 referenced in buffering period
[h264 @ 0x102020c00] no frame!
[flv @ 0x102018600] decoding for stream 0 failed
[flv @ 0x102018600] Could not find codec parameters for stream 0 (Video: h264): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, flv, from 'tmp/rangetest2.flv':
  Duration: 00:20:32.23, start: 1218.614000, bitrate: 5 kb/s
    Stream #0:0: Video: h264, 30 tbr, 1k tbn, 2k tbc
    Stream #0:1: Audio: aac, 44100 Hz, mono, fltp
File 'tmp/rangetest2.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'tmp/rangetest2.mp4':
  Metadata:
    encoder         : Lavf55.12.100
    Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono
Stream mapping:
  Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help
[flv @ 0x102018600] Stream discovered after head already parsed
[flv @ 0x102018600] New data stream 0:2 at pos:757450 and DTS:1231.23s
size=     134kB time=00:00:14.14 bitrate=  77.6kbits/s
video:0kB audio:131kB subtitle:0 global headers:0kB muxing overhead 2.402472%
%