ffmpeg decklink.txt

1. Download ffmpeg git master
2. Download blackmagic SDK
3. use something like ./configure --enable-decklink --extra-cflags="-I/Users/admin/kieran_repos/ffmpeg/Mac/include" --extra-ldflags="-L/Users/admin/kieran_repos/ffmpeg/Mac/include" 
4. This will probably fail so use Make V=1
5. This will probably fail so copy paste command and remove -std=c99 as per https://ffmpeg.org/pipermail/ffmpeg-user/2014-November/024313.html
6. Running the gcc command resulted in failures - so I added 'static' to the three problematic lines listed in this thread http://ffmpeg.gusari.org/viewtopic.php?f=8&t=1789
7. make - all seems well
8. ffmpeg -bm_v210 1 -f decklink -i 'UltraStudio 4K@2' -c:v ffv1 -level 3 -c:a copy -vf setfield=tff -t 3 output.mkv


lines for reference in case gusari diesL
CXX   libavdevice/decklink_common.o
In file included from libavdevice/decklink_common.cpp:26:
/Users/jimmartin/BMDSDK_10.3.1/Mac/include/DeckLinkAPIDispatch.cpp:56:6: error: no previous prototype for function
      'InitDeckLinkAPI' [-Werror,-Wmissing-prototypes]
void    InitDeckLinkAPI (void)
        ^
/Users/jimmartin/BMDSDK_10.3.1/Mac/include/DeckLinkAPIDispatch.cpp:77:7: error: no previous prototype for function
      'IsDeckLinkAPIPresent' [-Werror,-Wmissing-prototypes]
bool            IsDeckLinkAPIPresent (void)
                ^
/Users/jimmartin/BMDSDK_10.3.1/Mac/include/DeckLinkAPIDispatch.cpp:157:6: error: no previous prototype for function
      'InitBMDStreamingAPI' [-Werror,-Wmissing-prototypes]
void InitBMDStreamingAPI(void)
     ^
3 errors generated.
make: *** [libavdevice/decklink_common.o] Error 1