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  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
    sur le web 2.0 et dans les entreprises qui en vivent.
    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

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  • Setting dpi flag in image files generated using ffmpeg

    17 mars 2023, par jim_e_jib

    We're using ffmpeg to batch out some TIFF images that are being resized and having white borders created to fit specific paper sizes.

    


    The resulting images default to 72dpi, even when the source is 300dpi. Is there a way to set the dpi flag in the output file ?

    


    Many thanks :-)

    


    The command we're using :

    


    for %%a in ("*.tif") do ffmpeg -i "%%a" -vf "scale=6974:4919:force_original_aspect_ratio=decrease,pad=7016:4961:(ow-iw)/2:(oh-ih)/2:color=white, format=rgb24" "%%~na A2 poster 594x420mm-Border.tif"


    


    We have tried using -dpi 300 in the code but get the error that this is not a recognised.

    


    Edit :

    


    I have just managed to answer my own question :

    


    for %%a in ("*.tif") do ffmpeg -i "%%a" -vf "scale=6974:4919:force_original_aspect_ratio=decrease,pad=7016:4961:(ow-iw)/2:(oh-ih)/2:color=white,format=rgb24" -dpi 300 "%%~na A2 poster 594x420mm-Border.tif"


    


    I had been placing the -dpi 300 in the wrong place when I'd tried it...

    


  • ffmpeg : thumbnail of frame, preserve aspect ratio, apply background / padding / fill colour

    16 octobre 2014, par Pistos

    I already have found out how to scale the thumbnail to stay within specified bounding dimensions while maintaining aspect ratio. For example, to get the frame shown at 6 seconds into the input.mp4 video file, and scale it to fit into 96x60 (16:10 aspect ratio) :

    ffmpeg -y -i input.mp4 -ss 6 -vframes 1 -vf scale="'if(gt(a,16/10),96,-1)':'if(gt(a,16/10),-1,60)'" output.png

    This is fine, it works.

    Next, I would like to do the same, but if the video’s aspect ratio is not exactly 16:10, then I would like to force the output image to have an aspect ratio of 16:10 by taking the above transformation, and filling or padding the space with white. That is, I want the output to be as if I took, say, a 96x48 image, and laid it over a 96x60 white background, resulting in white bars above and below the 96x48 image.

    Ideally, I do not want to resort to using another tool or library, such as ImageMagick. It would be best if ffmpeg could do this on its own.

  • ffmpeg : thumbnail of frame, preserve aspect ratio, apply background / padding / fill colour

    4 juin 2018, par Pistos

    I already have found out how to scale the thumbnail to stay within specified bounding dimensions while maintaining aspect ratio. For example, to get the frame shown at 6 seconds into the input.mp4 video file, and scale it to fit into 96x60 (16:10 aspect ratio) :

    ffmpeg -y -i input.mp4 -ss 6 -vframes 1 -vf scale="'if(gt(a,16/10),96,-1)':'if(gt(a,16/10),-1,60)'" output.png

    This is fine, it works.

    Next, I would like to do the same, but if the video’s aspect ratio is not exactly 16:10, then I would like to force the output image to have an aspect ratio of 16:10 by taking the above transformation, and filling or padding the space with white. That is, I want the output to be as if I took, say, a 96x48 image, and laid it over a 96x60 white background, resulting in white bars above and below the 96x48 image.

    Ideally, I do not want to resort to using another tool or library, such as ImageMagick. It would be best if ffmpeg could do this on its own.

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