1) Install the Mac driver for BMD (BMD Desktop)
I assume you mean the standard desktop video driver (which is installed
together with Media Express)?
2) Download the Decklink SDK (from
https://www.blackmagicdesign.com/support/download/f3e35f03b97440c4893fdf7e0dfdf97c/Mac%20OS%20X)
Where should I unzip the sdks, does it matter?
3) Install all dependencies for FFMPEG (use Brew as explained in the FFMPEG
compilation guide for Mac OS)
—> brew install automake fdk-aac git lame libass libtool libvorbis libvpx \
opus sdl shtool texi2html theora wget x264 xvid yasm
If I’ve run brew before to install the stuff should I remove and reinstall?
4) Download FFMPEG from Git
—> git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg
cd ffmpeg
5) Prepare the configuration file (adapt according to your needs BUT
—enable-deckling is required for BMD). Adapt the path for your Decklink SDK
—> ./configure --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-libass \
--enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus \
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libxvid --enable-decklink
--extra-cflags=-I/somepath/blackmagicsdk/Mac/include
--extra-ldflags=-L/somepath/blackmagicsdk/Mac/include
6) If you use Mac OS X 10.9 or above, edit « config.mak »
—> vi config.mak
Remove all references to « -std=c99 » (there are 2)
7) Edit DeckLinkAPIDispatch.cpp (in /somepath/blackmagicsdk/Mac/include)
—> add the word "static" to the beginning of lines 56, 77, and 157
56: void InitDeckLinkAPI (void)
77: bool IsDeckLinkAPIPresent (void)
157: void InitBMDStreamingAPI(void)
8) Make && sudo make install
Now that FFMPEG in installed with Decklink support, you can get the audio-video
stream from your BMD devices directly in FFMPEG.
Use the following commands:
ffmpeg -f decklink -list_devices 1 -i dummy
ffmpeg -f decklink -list_formats 1 -i ‘UltraStudio Mini Recorder’
If I wish to do this on a linux system [ ubuntu ]
do I need to edit
the DeckLinkAPIDispatch.cpp & config.mak
or simply
—enable-deckling in the config?
basically - what are the suggested steps?
thank you
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