[FFmpeg-user] Question on enable decklink in ffmpeg

[Ricardo Pena]

Thank you for your critique.  I overlooked my version numbers.

I upgraded my docker container build to 2.8.4 and used Blackmagic version
10.5.2 and it has compiled and now detected the device correctly.  Thanks
again!

Once I extracted the compiled executables into the host computer, the
output is now:

> ./ffmpeg -f decklink -list_devices 1 -i dummy

ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  configuration: --prefix=/usr/local --extra-cflags=-I/usr/local/include
--extra-ldflags=-L/usr/local/lib --bindir=/usr/local/bin --extra-libs=-ldl
--enable-version3 --enable-libx264 --enable-gpl --enable-postproc
--enable-nonfree --enable-avresample --enable-libfdk_aac --disable-debug
--enable-small --enable-decklink
--extra-cflags=-I/usr/src/Blackmagic-SDK-10.5.2/Linux/include/
--extra-ldflags=-L/usr/src/Blackmagic-SDK-10.5.2/Linux/include/
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[decklink @ 0x2310380] Blackmagic DeckLink devices:
[decklink @ 0x2310380] 'DeckLink SDI'
dummy: Immediate exit requested

------
Sincerely,
Ricardo Peña, Jr.
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On Wed, Jan 6, 2016 at 3:15 AM, Moritz Barsnick <barsnick at gmx.net> wrote:

> On Tue, Jan 05, 2016 at 15:23:12 -0600, Ricardo Pena wrote:
> >   I keep getting the error:
> > " Unknown input format: 'decklink' "
> > when typing in the command :
> > " ffmpeg -f decklink -list_devices 1 -i dummy "
>
> Please show us the complete, uncut console output of that command. The
> output contains information which is useful and not just there for the fun
> of it.
>
> > Setup:
> > - Blackmagic Decklink (working in Ubuntu 64 bit 14.04 with MediaExpress
> > from Blackmagic)
> > - FFMPEG (compiled 2.4.11)
> > - Blackmagic SDK (10.5.2)
>
> Why ffmpeg 2.4.11? That should have decklink support, but it has
> improved (extremely?) in recent versions. And I see no reason
> whatsoever for choosing an old ffmpeg tree when compiling your own
> version!
>
> > ENV FFMPEG_VERSION 2.4.11
> > # monitor releases at https://github.com/FFmpeg/FFmpeg/releases
>
> Well, somebody is apparently not actually monitoring. 2.8.4 is latest,
> and you might as well take HEAD of git master when compiling yourself.
>
> > ENV BLACKMAGIC_SDK_VERSION 10.5.1
>
> There's a newer version of that available as well.
>
> Moritz
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