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  • 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

  • Contribute to translation

    13 avril 2011

    You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
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  • 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".
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Sur d’autres sites (6778)

  • FFmpeg capture, mkvtimestamp_v2 and timecode don't play nice

    24 mai 2021, par Bouke

    Trying to capture and modify the TC in-file afterwards.
I've found a nice way to store the timestamps from the capture.
Gyan's brillant filterchain

    


    This works fine using this line :

    


    ffmpeg -hide_banner -f "decklink" -queue_size "1073741824" -raw_format "auto" -format_code "Hi50" -video_input "sdi" -i "bm mini One" -filter_complex "settb=1/1000,setpts=RTCTIME/1000-1500000000000,mpdecimate,split[out][ts];[out]setpts=N/25/TB[out]" -map "[out]" -c:a "copy" -c:v "prores" -profile:v "1" -vendor "ap10" -pix_fmt "yuv422p10le" "/Volumes/Data/tst1.mov" -map "[ts]" -f mkvtimestamp_v2 "/Volumes/Data/time.txt" -vsync 0


    


    But, when I add -timecode "00:00:00:00" (to force a TC atom in the output), horrible things happen.

    


    ffmpeg -f "decklink" -queue_size "1073741824" -raw_format "auto" -format_code "Hi50" -video_input "sdi" -i "bm mini One" -filter_complex "settb=1/1000,setpts=RTCTIME/1000-1500000000000,mpdecimate,split[out][ts];[out]setpts=N/25/TB[out]" -map "[out]" -timecode "00:01:00:00" -c:a "copy" -c:v "prores" -profile:v "1" -vendor "ap10" -pix_fmt "yuv422p10le" "/Volumes/Data/tst1.mov" -map "[ts]" -f mkvtimestamp_v2 "/Volumes/Data/time.txt" -vsync 0


    


    The timecode does not run at the video speed, skips a frame or two here and there, and the image freezes after a random amount of time (between 10 seconds and a minute or so).

    


    How come the timecode can mess up stuff that much ? From what I understand it's just a couple of atoms in the moov atom, and a reference where the actual TC value (as frames) is stored in the mdat.

    


    I highly suspect the -vsync 0 to also work on the video, and I've had issues with that before. If I omit that, the video is fine, the TC is fine, but there is no metadata output, just the # timecode format v2

    


  • Opencv Won't compile due to "cap_ffmpeg_impl.hpp" and "ffmpeg_codecs.hpp"

    13 octobre 2022, par AmberGraph41161

    I am new to opencv and linux. I am trying to install opencv or build opencv from source to use the library with c++. When building or trying to use "make" to build all the files, everything is fine until around 50% (I've tried to redo the entire installation process multiple times over because I have no idea what I am doing and keep getting the same errors). At around the 50% mark, I get the same two errors :

    


    make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/build.make:244: modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:5218: modules/videoio/CMakeFiles/opencv_videoio.dir/all] Error 2
make: *** [Makefile:166: all] Error 2


    


    I get these two errors as well as a ton of build error messages containing errors about 2 files in particular (I get a bunch of errors and all of them deal with 2 files).

    


    /home/jinwoo_k/opencv/opencv-4.6.0/modules/videoio/src/ffmpeg_codecs.hpp:96:27: error: ‘CODEC_ID_LJPEG’ was not declared in this scope; did you mean ‘AV_CODEC_ID_LJPEG’?
   96 | #define AV_CODEC_ID_LJPEG CODEC_ID_LJPEG
      |                           ^~~~~~~~~~~~~~
/home/jinwoo_k/opencv/opencv-4.6.0/modules/videoio/src/cap_ffmpeg_impl.hpp:215:26: note: in expansion of macro ‘AV_CODEC_ID_LJPEG’
  215 | #  define CV_CODEC(name) AV_##name
      |                          ^~~
/home/jinwoo_k/opencv/opencv-4.6.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2842:10: note: in expansion of macro ‘CV_CODEC’
 2842 |     case CV_CODEC(CODEC_ID_LJPEG):
      |          ^~~~~~~~
/home/jinwoo_k/opencv/opencv-4.6.0/modules/videoio/src/ffmpeg_codecs.hpp:100:30: error: ‘CODEC_ID_RAWVIDEO’ was not declared in this scope; did you mean ‘AV_CODEC_ID_RAWVIDEO’?
  100 | #define AV_CODEC_ID_RAWVIDEO CODEC_ID_RAWVIDEO
      |                              ^~~~~~~~~~~~~~~~~



    


    ^^^These are just a couple of the error messages, I get hundreds of them.

    


    I read another stackoverflow post about opencv and ffmpeg : OpenCV 3.0.0 make error with FFMPEG
but I don't think that this is the same error that I have. I don't believe that I have made a mistake in the installation or build process or anything with cmake - I have followed and redone the process of following mutliple video and forum guides on how to install opencv. What am I doing wrong ?

    


  • Merge commit '3794062ab1a13442b06f6d76c54dce51ffa54697'

    9 avril 2017, par Clément Bœsch
    Merge commit '3794062ab1a13442b06f6d76c54dce51ffa54697'

    * commit '3794062ab1a13442b06f6d76c54dce51ffa54697' :
    
  Remove Plan 9 support
    

    Merged-by : Clément Bœsch <u@pkh.me>
    • [DH] Makefile
    • [DH] compat/plan9/head
    • [DH] compat/plan9/main.c
    • [DH] compat/plan9/printf
    • [DH] configure
    • [DH] doc/platform.texi
    • [DH] libavformat/os_support.h
    • [DH] library.mak
    • [DH] tests/api/Makefile
    • [DH] tests/checkasm/Makefile

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