Extract part of a video with FFmpeg

ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
  configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'GOPR8176.MP4':
  Metadata:
    major_brand     : avc1
    minor_version   : 0
    compatible_brands: avc1isom
    creation_time   : 2017-01-25 21:47:33
  Duration: 00:00:23.17, start: 0.000000, bitrate: 25520 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x720 [SAR 1:1 DAR 16:9], 25119 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    Metadata:
      creation_time   : 2017-01-25 21:47:33
      handler_name    :  GoPro AVC
      encoder         : GoPro AVC encoder
      timecode        : 21:46:14:55
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 64 kb/s (default)
    Metadata:
      creation_time   : 2017-01-25 21:47:33
      handler_name    :  GoPro AAC
      timecode        : 21:46:14:55
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2017-01-25 21:47:33
      timecode        : 21:46:14:55
aevalsrc=0: could not seek to position 0.570
Input #1, lavfi, from 'aevalsrc=0':
  Duration: N/A, start: 0.000000, bitrate: 2822 kb/s
    Stream #1:0: Audio: pcm_f64le, 44100 Hz, mono, dbl, 2822 kb/s
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x170b680] using SAR=1/1
[libx264 @ 0x170b680] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
[libx264 @ 0x170b680] profile High, level 3.2
[libx264 @ 0x170b680] 264 - core 142 r2495 6a301b6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=4 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=20 rc=crf mbtree=1 crf=28.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '4518596030918392239_test.mp4':
  Metadata:
    encoder         : Lavf56.15.102
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 59.94 fps, 60k tbn, 59.94 tbc (default)
    Metadata:
      encoder         : Lavc56.13.100 libx264
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, mono, fltp, 128 kb/s (default)
    Metadata:
      encoder         : Lavc56.13.100 aac
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[mp4 @ 0x16565c0] Starting second pass: moving the moov atom to the beginning of the file
frame=  401 fps=104 q=-1.0 Lsize=     259kB time=00:00:06.69 bitrate= 316.9kbits/s
video:140kB audio:107kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.737318%
[libx264 @ 0x170b680] frame I:2     Avg QP:29.42  size: 22146
[libx264 @ 0x170b680] frame P:102   Avg QP:30.25  size:   568
[libx264 @ 0x170b680] frame B:297   Avg QP:31.04  size:   137
[libx264 @ 0x170b680] consecutive B-frames:  1.0%  0.5%  0.7% 97.8%
[libx264 @ 0x170b680] mb I  I16..4: 49.5% 37.5% 13.0%
[libx264 @ 0x170b680] mb P  I16..4:  1.2%  0.3%  0.0%  P16..4:  5.0%  0.3%  0.0%  0.0%  0.0%    skip:93.2%
[libx264 @ 0x170b680] mb B  I16..4:  0.2%  0.0%  0.0%  B16..8:  1.0%  0.0%  0.0%  direct: 0.6%  skip:98.3%  L0:63.8% L1:35.8% BI: 0.4%
[libx264 @ 0x170b680] 8x8 transform intra:26.9% inter:54.6%
[libx264 @ 0x170b680] coded y,uvDC,uvAC intra: 22.5% 33.7% 4.2% inter: 0.1% 1.0% 0.0%
[libx264 @ 0x170b680] i16 v,h,dc,p: 41% 26% 12% 21%
[libx264 @ 0x170b680] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 20% 39%  4%  6%  4%  6%  3%  6%
[libx264 @ 0x170b680] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 28% 17%  4%  6%  5%  8%  3%  6%
[libx264 @ 0x170b680] i8c dc,h,v,p: 69% 17% 12%  2%
[libx264 @ 0x170b680] Weighted P-Frames: Y:5.9% UV:1.0%
[libx264 @ 0x170b680] ref P L0: 70.3% 29.7%
[libx264 @ 0x170b680] ref B L0: 74.3% 25.7%
[libx264 @ 0x170b680] ref B L1: 95.4%  4.6%
[libx264 @ 0x170b680] kb/s:170.86