Compilando e instalando ffmpeg com Decklink SDK e o protocolo SRT

• Faça download do Descktop Video Driver e Desktop Video SDK https://www.blackmagicdesign.com/support/family/capture-and-playback

• Instalando driver Decklink

tar -xf Blackmagic_Desktop_Video_Linux_*.tar
cd Blackmagic_Desktop_Video_Linux_*/deb/x86_64/
sudo dpkg -i desktopvideo_*.deb
sudo apt-get install -f
BlackmagicFirmwareUpdater status
# se solicitado a atualizar, execute uma atualização:
BlackmagicFirmwareUpdater update 0
# se solicitado a renicialização, reinicie o dispositivo:
sudo reboot

• Unzip Desktop Video SDK

  sudo apt install unzip
  unzip Blackmagic_DeckLink_SDK_*.zip
  mkdir -p ~/ffmpeg_sources ~/bin
  cp -r Blackmagic\ DeckLink\ SDK\ */Linux/ ~/ffmpeg_sources/BMD_SDK

• Instale o protocolo SRT

sudo apt-get install libssl-dev
cd ~/ffmpeg_sources
git clone --depth 1 https://github.com/Haivision/srt.git
mkdir srt/build
cd srt/build
cmake -DCMAKE_INSTALL_PREFIX="$HOME/ffmpeg_build" -DENABLE_C_DEPS=ON -DENABLE_SHARED=OFF -DENABLE_STATIC=ON ..
make
make install

• Siga as instruções para compilar o ffmpeg https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  • Install dependencies

    sudo apt-get update -qq && sudo apt-get -y install \
    autoconf \
    automake \
    build-essential \
    cmake \
    git-core \
    libass-dev \
    libfreetype6-dev \
    libtool \
    libvorbis-dev \
    pkg-config \
    texinfo \
    wget \
    zlib1g-dev
    sudo apt-get -y install \
    nasm yasm libx264-dev libx265-dev libnuma-dev libvpx-dev \
    libfdk-aac-dev libmp3lame-dev libopus-dev

  • Baixe o código fonte do ffmpeg e siga os comandos abaixo.

    cd ~/ffmpeg_sources
    wget https://ffmpeg.org/releases/ffmpeg-4.1.3.tar.bz2
    tar -xvf ffmpeg-*.tar.bz2
    cd ffmpeg-*/
    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
    --prefix="$HOME/ffmpeg_build" \
    --pkg-config-flags="--static" \
    --extra-cflags="-I$HOME/ffmpeg_build/include -I$HOME/ffmpeg_sources/BMD_SDK/include" \
    --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
    --extra-libs="-lpthread -lm" \
    --bindir="$HOME/bin" \
    --enable-gpl \
    --enable-libass \
    --enable-libfdk-aac \
    --enable-libfreetype \
    --enable-libmp3lame \
    --enable-libopus \
    --enable-libvorbis \
    --enable-libvpx \
    --enable-libx264 \
    --enable-libx265 \
    --enable-nonfree \
    --enable-decklink \
    --enable-libsrt

    Observe a adição de --enable-decklink, --enable-libsrt e BlackMagicDesign SDK em--extra-cflags. Existem alterações de API no BMD SDK 11 em diante; portanto, se o ffmpeg não for compilado, compile-o com o BMD SDK 10.11.4

  • Compile e instale.

    PATH="$HOME/bin:$PATH" make -j `nproc`
    sudo cp ffmpeg ffprobe /usr/local/bin/

  • Essa documentação teve como base os seguintes projetos https://github.com/Haivision/srt/blob/master/README.md https://gist.github.com/afriza/879fed4ede539a5a6501e0f046f71463

• Exemplo de execução

  • Server SRT

    [program:SRT1]
    command=srt-live-transmit srt://5000 srt://9999
    user=cidadeverde
    numprocs=1
    autostart=true
    autorestart=true
    startsecs=10
    startretries=1000
    priority=1

  • SRT -> BlackMagic ffmpeg -probesize 1024 -vcodec hevc -loglevel debug -i srt://192.168.254.70:9998 -f decklink -pix_fmt uyvy422 - format_code Hi59 -s 1920x1080 -r 30000/1001 'DeckLink Duo (2)' -analyzeduration 0