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Autres articles (111)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • 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

Sur d’autres sites (10463)

  • exr : check if line offset table is complete only once per frame

    21 février 2013, par Paul B Mahol

    exr : check if line offset table is complete only once per frame

  • cmdutils : add opencl command line options to ffmpeg

    11 avril 2013, par highgod0401

    cmdutils : add opencl command line options to ffmpeg

  • Get middle line from the output of a command

    14 décembre 2022, par Kishore T

    The following command list the duration of I-frames present in a video file.

    


    ffprobe -i ./test.mp4 -v quiet -skip_frame nokey -select_streams v:0 -of flat -show_entries frame=pkt_pts_time | awk -F'=' '{gsub(/"/, "", $NF); print $NF}'


    


    I'm trying to get the duration of I-frame that is in middle. The output of the above command will be like

    


    0.066667
2.066667
4.066667
9.066667
14.066667
19.066667
24.066667


    


    How do I get the middle value ? Here, I would like to get 9.066667 as the result. If the number of lines is even (say I've 2 values), I need to get the 1st value.

    


    I tried using wc to get the number of lines and sed to print the middle line. But, this straightforward solution required me to run the command twice. I tried piping the command, but I didn't find any solution for storing the value in a variable (from the wc command) and using the same in another command (sed command) while retaining the piped output.

    


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