mario@circo3d-md:~/Escritorio/Camera$ ffmpeg -r 19.5 -i VID_20120104_152114.3gp vidff.mp4
ffmpeg version 3.3.9 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  configuration: --disable-decoder=amrnb --disable-decoder=libopenjpeg --disable-mips32r2 --disable-mips32r6 --disable-mips64r6 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-msa --disable-libopencv --disable-podpages --disable-stripping --enable-avfilter --enable-avresample --enable-gcrypt --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libkvazaar --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx265 --enable-libxvid --enable-libzvbi --enable-nonfree --enable-opengl --enable-openssl --enable-postproc --enable-pthreads --enable-shared --enable-version3 --incdir=/usr/include/x86_64-linux-gnu --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --toolchain=hardened --enable-frei0r --enable-chromaprint --enable-libx264 --enable-libiec61883 --enable-libdc1394 --enable-vaapi --disable-opencl --enable-libmfx --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libavresample   3.  5.  0 /  3.  5.  0
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5561eb24e500] Could not find codec parameters for stream 1 (Video: mpeg4 (mp4v / 0x7634706D), none, 495 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'VID_20120104_152114.3gp':
  Metadata:
    major_brand     : 3gp4
    minor_version   : 0
    compatible_brands: isom3gp4
    creation_time   : 2012-01-04T15:22:07.000000Z
    location-eog    : +00.0000+000.0000/QCOM
    location        : +00.0000+000.0000/QCOM
  Duration: 00:00:51.66, start: 0.000000, bitrate: 777 kb/s
    Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 156 kb/s (default)
    Metadata:
      creation_time   : 2012-01-04T15:22:07.000000Z
      handler_name    : SoundHandle
    Stream #0:1(eng): Video: mpeg4 (mp4v / 0x7634706D), none, 495 kb/s, SAR 1:1 DAR 0:0, 17.42 fps, 90k tbr, 90k tbn, 90k tbc (default)
    Metadata:
      rotate          : 90
      creation_time   : 2012-01-04T15:22:07.000000Z
      handler_name    : VideoHandle
      encoder         :                                
    Side data:
      displaymatrix: rotation of -90.00 degrees
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'vidff.mp4':
  Metadata:
    major_brand     : 3gp4
    minor_version   : 0
    compatible_brands: isom3gp4
    location        : +00.0000+000.0000/QCOM
    location-eog    : +00.0000+000.0000/QCOM
    encoder         : Lavf57.71.100
    Stream #0:0(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2012-01-04T15:22:07.000000Z
      handler_name    : SoundHandle
      encoder         : Lavc57.89.100 aac
size=     808kB time=00:00:51.64 bitrate= 128.1kbits/s speed=14.2x    
video:0kB audio:797kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.282464%
[aac @ 0x5561eb2815e0] Qavg: 13020.050
mario@circo3d-md:~/Escritorio/Camera$