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Autres articles (58)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

Sur d’autres sites (4480)

  • Revision d9655e42b8 : Change in rddiv parameter to make it a power of 2 Converts the constant rddiv p

    11 octobre 2013, par Deb Mukherjee

    Changed Paths :
     Modify /vp9/encoder/vp9_rdopt.c


     Modify /vp9/encoder/vp9_rdopt.h



    Change in rddiv parameter to make it a power of 2

    Converts the constant rddiv parameter to 128 (from 100) and
    implements RDCOST with bit-shift rather than multiplication.
    Other parameters are also adjusted to roughly keep the same
    balance between Rate and Distortion.

    There is a slight speed-up of about 0.5-1% (at speed 0) as
    testted on football_cif.

    There is a slight change in performance due to small change
    in the parameters.
    derfraw300 : +0.033%
    stdhdraw250 ; +0.102%

    Change-Id : I70ac69f58fa71c83108f68fe41796cd19d1fc760

  • How to run ffmpeg in a scheduled batch file with a file exclusion list ?

    5 juin 2022, par MrZoops

    I have the following batch file created to run as a schedule task. It auto encodes the audio to AAC in my main media folder. Everything is working, but now I need to do 2 more things :

    



      

    1. Delete the original upon completion.

      2. 


    2. Set it so that the next time it runs, it does not try to convert the already converted files.

      3. 


    



    Is that possible ? How would that look ? Is there a way to "disregard" file names with CONVERTED in them ?

    



    for /r "C:\Users\USER\Desktop\TEST" %%a in ("*.mkv") do ffmpeg -i "%%a" -vcodec copy -acodec aac -ac 2 -ab 256K %%~dpnaCONVERTED.mkv


    


  • How to extract duration time of online videos listed in a text file

    22 août 2022, par Ginofalaci

    I need to check the duration of thousand of videos online. I m trying to get this from a text file containing the urls of the videos.

    


    I have those two commands that are working great with one url, but i don't find out how to get it work with a list within a file text.

    


    fmpeg -i My.url 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,//


    


    or this :

    


    ffmpeg -i my.url 2>&1 | grep Duration | sed 's/Duration: \(.*\), start/\1/g'


    


    im trying :

    


    fmpeg -i listurls.txt 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,//


    


    or this :

    


    ffmpeg -i listurls.txt 2>&1 | grep Duration | sed 's/Duration: \(.*\), start/\1/g'


    


    my file text is like this :

    


    myurl1.m3u8
    
myurl2.m3u8
    
myurl3.m3u8
    
myurl4.m3u8
    
myurl5.m3u8

    


    I've also tried :

    


    file 'myurl1.m3u8'
    
file 'myurl2.m3u8'
    
file 'myurl3.m3u8'
    
file 'myurl4.m3u8'
    
file 'myurl5.m3u8'

    


    but it doesn't work.

    


    Also some videos might not be online anymore, but still referenced, so it would give no result, but I would like if possible to have the result "0" than nothing, it will be much easier to use the results afterwards.

    


    (awk, sed, mediainfo, exiftool, any will be good, ) Thanks in advance.

    


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