[FFmpeg-user] ffmpeg on windows with dshow, support for blackmagic intensity pro with HDYC uyvy422 support.

[Bjorn Ramakers]

Hey,

Please bear with me, I have very little experience with ffmpeg but I dont
mind listening (reading) and am usually a quick study.

I am trying to use ffmpeg (http://ffmpeg.zeranoe.com windows build) with my
blackmagic intensity pro, but cant get it to work. Input should be HDYC
uyvy422.

Whatever I do I keep getting no video (neither on ffmpeg to file nor with
ffplay).

If I try : ffplay -f dshow -i video="Decklink Video Capture"

this is the output :

ffplay version N-56892-ge1f8184 Copyright (c) 2003-2013 the FFmpeg
developers
  built on Oct  4 2013 18:01:41 with gcc 4.8.1 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 46.100 / 52. 46.100
  libavcodec     55. 34.100 / 55. 34.100
  libavformat    55. 19.100 / 55. 19.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 88.101 /  3. 88.101
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, dshow, from 'video=Decklink Video Capture':    0B f=0/0
  Duration: N/A, start: 0.030097, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422(tv),
1280x720, 59.
94 tbr, 10000k tbn, 59.94 tbc
[dshow @ 042dd000] real-time buffer 121% full! frame dropped!
    Last message repeated 1 times
[dshow @ 042dd000] real-time buffer 121% full! frame dropped!=0/0
    Last message repeated 6 times
    Last message repeated 6 times


Even specifying the formats gives the same buffer full error :

c:\ffmpeg>ffplay -video_size 1280x720 -pixel_format uyvy422 -framerate
59.94 -fdshow -i video="Decklink Video Capture"  -format x264

Gives :

ffplay version N-56892-ge1f8184 Copyright (c) 2003-2013 the FFmpeg
developers
  built on Oct  4 2013 18:01:41 with gcc 4.8.1 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 46.100 / 52. 46.100
  libavcodec     55. 34.100 / 55. 34.100
  libavformat    55. 19.100 / 55. 19.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 88.101 /  3. 88.101
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, dshow, from 'video=Decklink Video Capture':    0B f=0/0
  Duration: N/A, start: 0.030254, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422(tv),
1280x720, 59.
94 tbr, 10000k tbn, 59.94 tbc
[dshow @ 0437d220] real-time buffer 121% full! frame dropped!
      Last message repeated 1 times
[dshow @ 0437d220] real-time buffer 121% full! frame dropped!=0/0
    Last message repeated 4 times
    Last message repeated 4 times


Anyone have an idea what I am doing wrong? Or is this setup just not
supported?

Bjorn.