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Médias (2)

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Autres articles (97)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • Possibilité de déploiement en ferme

    12 avril 2011, par

    MediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
    Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)

Sur d’autres sites (6982)

  • letterboxing with correct aspect ratios

    6 juillet 2014, par skcrpk

    i am trying to get letterboxing effect

    i am using

    scale=720:trunc(ow/a/2)*2,pad=720:480:(ow-iw)/2:(oh-ih)/2:black

    this correctly converts the video and calculates the height but it fails for some videos with negative values

    for example

    The aspect ratio for 720x480 is 640 x427

    Based on 640 width , height is changed to maintain the aspect ratio

    The video frame should be
    640 x 360

    Which cannot fit in 640 x 360

    how can correctly convert the videos whose height is larger than provided height

  • trying to create thumbnail per 10 second and scaling them at same time

    25 juin 2014, par user3774884

    i need to convert one video file every 10 second into one image or thumbnail. and at the same time i want to convert image width to 320 pixels and height according to width so that aspect ratio can be maintained.I am using the code written below

    "ffmpeg -i "inputfile" -f image2 -vf fps=fps=1/10,thumbnail,scale=360:trunc(ow/a/2)*2 putputfile%08d.jpg"

    its showing one syntax error near unexpected token ’(’"

  • FFmpeg : Concatenated clips extracted using -ss and -t, hang or go out of sync while playing

    20 juillet 2013, par Yogi

    I have a set of movies in different formats, and I am trying to extract small clips from these source movies, and concatenate them into one movie.

    My workflow has been the following :

    1. Convert all the source movies to the same format (width, height, fps, codec)T the scale and pad options are so that all movies oare of the same size, even if their aspect ratio is different.

      fmpeg  -i $infile -vcodec libx264 -strict -2  -vf scale=iw*sar*min(${MAX_WIDTH}/(iw*sar)\,${MAX_HEIGHT}/ih):ih*min(${MAX_WIDTH}/(iw*sar)\,${MAX_HEIGHT}/ih),pad=${MAX_WIDTH}:${MAX_HEIGHT}:(ow-iw)/2:(oh-ih)/2 -b:v 500k -b:a 64k -movflags +faststart -g 10  -r 25 ${outbasename}.mp4

    2. extract clips :

      ffmpeg -ss $starttime -t $duration -i $in_file -vcodec copy -acodec copy $out_file

    3. Then finally combine clips by first making a concat_list.txt file which contains the list of clips to be concatenated, and their duration, and then using ffmpegs's concat demux :

      ffmpeg -f concat -i concat_list.txt -c copy -movflags +faststart $oname

    The problem I am facing is that many of the final videos hang or go out of sync, somewhere in the middle of playing. I have tried using mjpeg as the codec, but I still get the same behavior. I can play the individual extracted clips, and then all seem to play fine in most players. Does anybody know what I am doing wrong ? I am using ffmpeg version 1.2.1.

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