iMac-de-damien:desktop damien$ /usr/local/bin/ffmpeg -i kU102A4*bb.mov -i logo_play_watermark.png -filter_complex "blend=all_mode='overlay':all_opacity=0.1" kU102A43.mp4
ffmpeg version 2.5.3 Copyright (c) 2000-2015 the FFmpeg developers
  built on Feb  7 2015 00:45:50 with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.5.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libfaac --enable-libass --enable-ffplay --enable-libfdk-aac --enable-openssl --enable-libopus --enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
  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 'kU102A4*bb.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2013-12-28 16:32:48
    encoder         : Lavf54.63.100
    title           : B S04 E00
  Duration: 00:00:59.54, start: 0.000000, bitrate: 10280 kb/s
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 165 kb/s (default)
    Metadata:
      creation_time   : 2013-12-28 16:32:48
      handler_name    : Core Media Data Handler
    Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 10104 kb/s, 49.92 fps, 50 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2013-12-28 16:32:48
      handler_name    : Core Media Data Handler
      encoder         : H.264
Input #1, png_pipe, from 'logo_play_watermark.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba, 100x62 [SAR 11811:11811 DAR 50:31], 25 tbr, 25 tbn, 25 tbc
[Parsed_blend_0 @ 0x7fc3d050b5c0] First input link top parameters (size 1280x720, SAR 1:1) do not match the corresponding second input link bottom parameters (100x62, SAR 1:1)
[Parsed_blend_0 @ 0x7fc3d050b5c0] Failed to configure output pad on Parsed_blend_0