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  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

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  • ffmpeg, /dev/video0, -f decklink

    20 mars 2019, par Camille Goudeseune

    I’m trying to capture video from a PCI card, the Blackmagic DeckLink Mini Recorder, via ffmpeg, on a headless host running Ubuntu 18.04.2 LTS, hopefully with a command like

    ffmpeg -f decklink -i /dev/video0 ...

    How can I make that work ? I have two obstacles.

    No /dev/video0

    ffmpeg -i /dev/video0 ... fails : /dev/video0: No such device or address.
    v4l2-ctl --list-devices fails with the same error message.

    I built /dev/video0, and it looks okay :

    mknod /dev/video0 c 81 0
    chown root.video /dev/video0
    chmod g+rw /dev/video0

    To compare this file with a working one, I ran strace cat /dev/video0 on this host, and on another host (Ubuntu 14) with a working /dev/video0. The outputs began to differ here (good, then bad) :

    fstat(1, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
    open("/dev/video0", O_RDONLY)           = 3  
    fstat(3, {st_mode=S_IFCHR|0660, st_rdev=makedev(81, 0), ...}) = 0
    fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
    ----

    fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
    openat(AT_FDCWD, "/dev/video0", O_RDONLY) = -1 ENXIO (No such device or address)

    So /dev/video0 is broken at a level lower than ffmpeg or v4l2 or even cat.

    On Ubuntu 14, man 8 MAKEDEV suggests that the error message means that "the kernel does not have the driver configured or loaded."

    This Ubuntu 18 host lacks that manpage, but it does have a few /snap/core/*/sbin/MAKEDEV, all the same, so I tried

    /snap/core/6350/sbin/MAKEDEV -n -v video

    It would have created over a hundred devices videoXX, radioXX, vtxXX, vbiXX. Those devices didn’t exist yet, so it seemed harmless to try it.

    rm /dev/video0; /snap/core/6350/sbin/MAKEDEV video

    That rebuilt /dev/video0, but "No such device" remains, from cat or ffmpeg.

    No decklink

    ffmpeg -f decklink ... fails with Unknown input format: 'decklink'.

    Neither black nor deck nor link is mentioned by ffmpeg -devices (fbdev, lavfi, oss, v4l2) and ffmpeg -formats (about 350), either for Ubuntu’s own version 3.4.4-0ubuntu0.18.04.1, or for version N-93330-g7ff89574c7 compiled from source on 2019 Mar 13 :

    git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
    cd ffmpeg
    ./configure --enable-nonfree --disable-doc --disable-w32threads --enable-pthreads

    (Although ./configure --help mentions --enable-decklink, using that yielded "ERROR : DeckLinkAPI.h not found." updatedb && locate DeckLinkAPI.h finds no file with that name, either.)

    The DeckLink PCI card is recognized by hwinfo and lspci.

    lsmod reports the loaded modules blackmagic and blackmagic_io.

    Maybe the PCI card is installed ok, but ffmpeg just can’t reach it because I can’t configure it for that.

    Edit : Rebooting didn’t fix anything.

  • OpenCV compile process fails

    12 septembre 2017, par bork

    So I’m following this post on how to install openCV for Python 3. And I’m running into some issues at the compile process. Running the make -j4 command goes fine up until it’s 28% through when I get this error message : error: use of undeclared identifier 'avcodec_free_frame'; did you mean 'avcodec_get_name'?

    I don’t even know where to start to solve this issue. I’ve got ffmpeg installed through brew.

    Complete list of commands :

    cd ~
    git clone https://github.com/Itseez/opencv.git
    cd opencv
    git checkout 3.0.0
    cd ~
    git clone https://github.com/Itseez/opencv_contrib.git
    cd opencv_contrib
    git checkout 3.0.0
    cd ~/opencv
    mkdir build
    cd build
    cmake CMAKE_BUILD_TYPE=RELEASE \
       -D CMAKE_INSTALL_PREFIX=/usr/local \
       -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \
       -D PYTHON3_LIBRARY=/usr/local/Cellar/python3/3.5.2_3/Frameworks/Python.framework/Versions/3.5/lib/python3.5/config-3.5m/libpython3.5.dylib \
       -D PYTHON3_INCLUDE_DIR=/usr/local/Cellar/python3/3.5.2_3/Frameworks/Python.framework/Versions/3.5/include/python3.5m/ \
       -D PYTHON3_EXECUTABLE=$VIRTUAL_ENV/bin/python \
       -D BUILD_opencv_python2=OFF \
       -D BUILD_opencv_python3=ON \
       -D INSTALL_PYTHON_EXAMPLES=ON \
       -D INSTALL_C_EXAMPLES=OFF \
       -D BUILD_EXAMPLES=ON .. \
       -D FFMPEG_INCLUDE_DIR=/usr/local/Cellar/ffmpeg/3.3.4/include/
       -D FFMPEG_LIB_DIR=/usr/local/Cellar/ffmpeg/3.3.4/lib/
       -D WITH_FFMPEG=ON
    cmake
    make -j4

    I got the FFMPEG_INCLUDE_DIR, FFMPEG_LIB_DIR and WITH_FFMPEG from this post : http://blog.jiashen.me/2014/12/23/build-opencv-3-on-mac-os-x-with-python-3-and-ffmpeg-support/

    The full error log :

    [ 28%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_qtkit.mm.o
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:317:9: error: use of undeclared identifier
         'avcodec_free_frame'; did you mean 'avcodec_get_name'?
           avcodec_free_frame(&picture);
           ^~~~~~~~~~~~~~~~~~
           avcodec_get_name
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavcodec/avcodec.h:6289:13: note: 'avcodec_get_name' declared here
    const char *avcodec_get_name(enum AVCodecID id);
               ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:317:28: error: cannot initialize a parameter of type
         'enum AVCodecID' with an rvalue of type 'AVFrame **'
           avcodec_free_frame(&picture);
                              ^~~~~~~~
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavcodec/avcodec.h:6289:45: note: passing argument to parameter 'id' here
    const char *avcodec_get_name(enum AVCodecID id);
                                               ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:632:23: error: use of undeclared identifier
         'avcodec_alloc_frame'
               picture = avcodec_alloc_frame();
                         ^
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:635:41: error: use of undeclared identifier
         'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                       avpicture_get_size( PIX_FMT_BGR24,
                                           ^~~~~~~~~~~~~
                                           AV_PIX_FMT_BGR24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
       AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:638:29: error: use of undeclared identifier
         'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                               PIX_FMT_BGR24, enc->width, enc->height );
                               ^~~~~~~~~~~~~
                               AV_PIX_FMT_BGR24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
       AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:738:67: error: use of undeclared identifier
         'PIX_FMT_RGB24'; did you mean 'AV_PIX_FMT_RGB24'?
       avpicture_fill((AVPicture*)&rgb_picture, rgb_picture.data[0], PIX_FMT_RGB24,
                                                                     ^~~~~~~~~~~~~
                                                                     AV_PIX_FMT_RGB24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:64:5: note: 'AV_PIX_FMT_RGB24' declared here
       AV_PIX_FMT_RGB24,     ///< packed RGB 8:8:8, 24bpp, RGBRGB...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:756:17: error: use of undeclared identifier
         'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                   PIX_FMT_BGR24,
                   ^~~~~~~~~~~~~
                   AV_PIX_FMT_BGR24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
       AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1110:15: error: use of undeclared identifier
         'avcodec_alloc_frame'
       picture = avcodec_alloc_frame();
                 ^
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1113:33: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
       size = avpicture_get_size( (PixelFormat) pix_fmt, width, height);
                                   ^~~~~~~~~~~
                                   AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1122:25: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
                          (PixelFormat) pix_fmt, width, height);
                           ^~~~~~~~~~~
                           AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1230:19: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
       c->pix_fmt = (PixelFormat) pixel_format;
                     ^~~~~~~~~~~
                     AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1405:26: error: use of undeclared identifier
         'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
       if (input_pix_fmt == PIX_FMT_BGR24) {
                            ^~~~~~~~~~~~~
                            AV_PIX_FMT_BGR24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
       AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1410:31: error: use of undeclared identifier
         'PIX_FMT_GRAY8'; did you mean 'AV_PIX_FMT_GRAY8'?
       else if (input_pix_fmt == PIX_FMT_GRAY8) {
                                 ^~~~~~~~~~~~~
                                 AV_PIX_FMT_GRAY8
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:70:5: note: 'AV_PIX_FMT_GRAY8' declared here
       AV_PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1423:25: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
                          (PixelFormat)input_pix_fmt, width, height);
                           ^~~~~~~~~~~
                           AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1429:47: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
                                                (PixelFormat)input_pix_fmt,
                                                 ^~~~~~~~~~~
                                                 AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1447:25: error: unknown type name 'PixelFormat'; did you
         mean 'AVPixelFormat'?
                          (PixelFormat)input_pix_fmt, width, height);
                           ^~~~~~~~~~~
                           AVPixelFormat
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
    enum AVPixelFormat {
        ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1604:25: error: use of undeclared identifier
         'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
           input_pix_fmt = PIX_FMT_BGR24;
                           ^~~~~~~~~~~~~
                           AV_PIX_FMT_BGR24
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
       AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1607:25: error: use of undeclared identifier
         'PIX_FMT_GRAY8'; did you mean 'AV_PIX_FMT_GRAY8'?
           input_pix_fmt = PIX_FMT_GRAY8;
                           ^~~~~~~~~~~~~
                           AV_PIX_FMT_GRAY8
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:70:5: note: 'AV_PIX_FMT_GRAY8' declared here
       AV_PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
       ^
    In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
    /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1683:25: error: use of undeclared identifier
         'PIX_FMT_YUV422P'; did you mean 'AV_PIX_FMT_YUV422P'?
           codec_pix_fmt = PIX_FMT_YUV422P;
                           ^~~~~~~~~~~~~~~
                           AV_PIX_FMT_YUV422P
    /usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:66:5: note: 'AV_PIX_FMT_YUV422P' declared here
       AV_PIX_FMT_YUV422P,   ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
       ^
    fatal error: too many errors emitted, stopping now [-ferror-limit=]
    20 errors generated.
    make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o] Error 1
    make[2]: *** Waiting for unfinished jobs....
    /Users/myuser/opencv/modules/videoio/src/cap_qtkit.mm:46:9: fatal error: 'QTKit/QTKit.h' file not found
    #import <qtkit></qtkit>QTKit.h>
           ^
    1 error generated.
    make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_qtkit.mm.o] Error 1
    make[1]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/all] Error 2
    make: *** [all] Error 2

    This question on openCV’s website seems to adress the same issue but there is no solution posted : http://answers.opencv.org/question/90091/error-use-of-undeclared-identifier-avcodec_free_frame-did-you-mean-avcodec_get_name/

  • ERROR : Cannot Autodetect input stream or No signal

    23 juin 2022, par Damián Devera

    I am using Decklink Mini Recorder to capture video (it has SDI and HDMI inputs, tried both).

    &#xA;

    This is my setup : Debian 10.2.1 (non GUI), ffmpeg 5.0, Blackmagic software 12.3

    &#xA;

    For that I installed custom build of ffmpeg :

    &#xA;

    sudo apt-get update -qq &amp;&amp; sudo apt-get -y install \&#xA;  autoconf \&#xA;  automake \&#xA;  build-essential \&#xA;  cmake \&#xA;  git-core \&#xA;  libass-dev \&#xA;  libmp3lame-dev \&#xA;  libfreetype6-dev \&#xA;  libtool \&#xA;  libvorbis-dev \&#xA;  pkg-config \&#xA;  texinfo \&#xA;  wget \&#xA;  zlib1g-dev&#xA;sudo apt-get -y install \&#xA;  nasm yasm&#xA;&#xA;sudo apt-get install -y libopus-dev&#xA;sudo apt-get install -y libvpx-dev&#xA;sudo apt-get install -y libx264-dev&#xA;sudo apt-get install -y libx265-dev&#xA;sudo apt-get install -y libnuma-dev&#xA;sudo apt-get install -y libfdk-aac-dev&#xA;sudo apt-get install -y libmp3lame-dev&#xA;&#xA;cd ~/ffmpeg_sources &amp;&amp; \&#xA;git -C fdk-aac pull 2> /dev/null || git clone --depth 1 https://github.com/mstorsjo/fdk-aac &amp;&amp; \&#xA;cd fdk-aac &amp;&amp; \&#xA;autoreconf -fiv &amp;&amp; \&#xA;./configure --prefix="$HOME/ffmpeg_build" --disable-shared &amp;&amp; \&#xA;make &amp;&amp; \&#xA;make install&#xA;&#xA;&#xA;&#xA;cd ~/ffmpeg_sources&#xA;wget https://ffmpeg.org/releases/ffmpeg-4.1.3.tar.bz2&#xA;tar -xvf ffmpeg-*.tar.bz2&#xA;cd ffmpeg-*/&#xA;PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \&#xA;  --prefix="$HOME/ffmpeg_build" \&#xA;  --pkg-config-flags="--static" \&#xA;  --extra-cflags="-I$HOME/ffmpeg_build/include -I$HOME/ffmpeg_sources/BMD_SDK/include" \&#xA;  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \&#xA;  --extra-libs="-lpthread -lm" \&#xA;  --bindir="$HOME/bin" \&#xA;  --enable-gpl \&#xA;  --enable-libass \&#xA;  --enable-libfdk-aac \&#xA;  --enable-libfreetype \&#xA;  --enable-libmp3lame \&#xA;  --enable-libopus \&#xA;  --enable-libvorbis \&#xA;  --enable-libvpx \&#xA;  --enable-libx264 \&#xA;  --enable-libx265 \&#xA;  --enable-nonfree \&#xA;  --enable-decklink&#xA;&#xA;PATH="$HOME/bin:$PATH" make -j `nproc`&#xA;sudo cp ffmpeg ffprobe /usr/local/bin/&#xA;

    &#xA;

    I can see my card using Blackmagic softwares for the card and also using ffmpeg -sources decklink.

    &#xA;

    But when I try to run this : ffmpeg -f decklink -i &#x27;DeckLink Mini Recorder&#x27; -t 10 -c:v libx264 -f mp4 test.mp4

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    I get error : Cannot Autodetect input stream or No signal  DeckLink Mini Recorder: Input/output error

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    UPDATE 1 : I used new command ffmpeg -y -format_code 23ps -f decklink -i &#x27;DeckLink Mini Recorder&#x27; test.mov -report&#xA;Now I can run command, but I capture only colour bars.

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    UPDATE 2 : I used new command ffmpeg -f decklink -video_input hdmi -i ‘DeckLink Mini Recorder’ -t 10 test.mp4&#xA;I am now capturing over HDMI.

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    Now I am trying to use SDI on the card (which is my main target) but running into same problems (using this command : ffmpeg -f decklink -video_input sdi -i ‘DeckLink Mini Recorder’ -t 10 test.mp4). I have HDMI to SDI convertor from BlackMagic (HDMI to SDI 3G). Does anybody know, what is the problem ?

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