ffmpeg capturing color bars only on blackmagic

Command
ffmpeg.exe  -f decklink -i "DeckLink Studio 2@6" -vcodec mpeg4 -strict -2 -b:v 2M -pix_fmt yuv420p -acodec aac -b:a 128k -bsf:v h264_mp4toannexb -f mpegts udp://127.0.0.1:5000?pkt_size=1316

Output
ffmpeg version git-2014-10-16-0e406ab Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct 16 2014 13:15:53 with gcc 4.9.1 (Rev3, Built by MSYS2 project)
  configuration: --arch=x86 --disable-debug --disable-doc --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avfilter --enable-bzlib --enable-zlib --enable-librtmp --enable-gnutls --enable-avisynth --enable-frei0r --enable-filter=frei0r --enable-libbluray --enable-libopenjpeg --enable-fontconfig --enable-libfreetype --enable-libass --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libschroedinger --enable-libsoxr --enable-libutvideo --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvo-aacenc --enable-openal --enable-libopus --enable-libvidstab --enable-libvpx --enable-libwavpack --enable-libxavs --enable-libx265 --enable-libxvid --enable-libzvbi --enable-decklink --enable-pthreads --enable-nonfree --enable-libfaac --enable-libfdk-aac --extra-cflags=-I/d/decklinkapi/include --extra-libs='-lxml2 -llzma -lstdc++ -lpng -lm -lpthread -lwsock32 -lhogweed -lnettle -lgmp -ltasn1 -lws2_32 -lwinmm -lgdi32 -lcrypt32 -lintl -lz -liconv -lole32' --extra-ldflags='-Wl,--allow-multiple-definition'
  libavutil      54. 10.100 / 54. 10.100
  libavcodec     56.  8.100 / 56.  8.100
  libavformat    56.  9.100 / 56.  9.100
  libavdevice    56.  1.100 / 56.  1.100
  libavfilter     5.  1.106 /  5.  1.106
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[decklink @ 0000000004d50c80] Found Decklink mode 1920 x 1080 with rate 25.00
[decklink @ 0000000004d50c80] Frame received (#1) - No input signal detected - Frames dropped 1
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, decklink, from 'DeckLink Studio 2@6':
  Duration: N/A, start: 0.000000, bitrate: 830976 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
    Stream #0:1: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1920x1080, 829440 kb/s, 25 tbr, 1000k tbn, 25 tbc
Output #0, mpegts, to 'udp://127.0.0.1:5000?pkt_size=1316':
  Metadata:
    encoder         : Lavf56.9.100
    Stream #0:0: Video: mpeg4, yuv420p, 1920x1080, q=2-31, 2000 kb/s, 25 fps, 90k tbn, 25 tbc
    Metadata:
      encoder         : Lavc56.8.100 mpeg4
    Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc56.8.100 aac
Stream mapping:
  Stream #0:1 -> #0:0 (rawvideo (native) -> mpeg4 (native))
  Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 4227 fps= 25 q=2.0 Lsize=   13146kB time=00:02:49.08 bitrate= 636.9kbits/s
video:11894kB audio:47kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 10.094250%