ffmpeg -i "/home/dexter/Downloads/prnfle1797x.m4v" -map 0.0 -map 0.1 -aspect 16:9 -y -f h264 -ab 112k -ar 48000 -ac 2 -vcodec h264_nvenc "/home/dexter/Downloads/prnfle1797x.264"
ffmpeg version 3.2.1-2~xenial Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --prefix=/usr --extra-version='2~xenial' --libdir=/usr/lib/ffmpeg --shlibdir=/usr/lib/ffmpeg --disable-static --disable-debug --toolchain=hardened --enable-pthreads --enable-runtime-cpudetect --enable-gpl --enable-shared --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --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-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv --enable-libkvazaar --enable-libopenh264 --enable-nonfree --enable-libfdk-aac
  libavutil      55. 34.100 / 55. 34.100
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.100 / 57. 56.100
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libavresample   3.  1.  0 /  3.  1.  0
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5575cda27040] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/dexter/Downloads/prnfle1797x.m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: mp42avc1isom
    creation_time   : 2011-12-02T10:36:58.000000Z
    show            : RENstimpy
  Duration: 00:40:40.56, start: 0.000000, bitrate: 5120 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 4983 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2011-12-02T10:36:58.000000Z
      handler_name    : "Gestor de contenido de v�deo Apple
      encoder         : H.264/AVC
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2011-12-02T10:36:58.000000Z
      handler_name    : #Gestor de contenido de sonido Apple
    Stream #0:2: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 512x512 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5575cda27040] Invalid stream specifier: .0.
    Last message repeated 5 times
Stream map '0.0' matches no streams.
To ignore this, add a trailing '?' to the map.