$ ffmpeg -i movie.mp4 -i logos/watermark.png -filter_complex 'overlay=x=main_w-overlay_w-10:y=main_h-overlay_h-10' -strict -2 output.mp4
ffmpeg version N-81498-g92916e8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 20160609
  configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-encoder=png
  libavutil      55. 29.100 / 55. 29.100
  libavcodec     57. 54.101 / 57. 54.101
  libavformat    57. 48.101 / 57. 48.101
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 58.100 /  6. 58.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'movie.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.40.101
  Duration: 00:07:54.94, start: 0.000000, bitrate: 208 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240, 147 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 56 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
[png_pipe @ 0x33fae60] Could not find codec parameters for stream 0 (Video: png, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #1, png_pipe, from 'logos/watermark.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, none, 25 tbr, 25 tbn, 25 tbc
No decoder for stream #1:0, filtering impossible
Error configuring complex filters.
Decoder not found