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Autres articles (36)

  • 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" (...)

  • Submit enhancements and plugins

    13 avril 2011

    If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
    You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.

Sur d’autres sites (6992)

  • FFMMEP Trim video then add watermark with multiple text

    20 novembre 2016, par Iura Gaitur

    I want to trim a video then convert a video using FFMPEG and place a watermark with multiple texts on it. I have commands for trimming :

    ffmpeg -i 1.mp4 -ss 00:00:03 -t 00:00:08 -async 1 -c copy output1.mp4

    and for watermark with text placing

    ffmpeg -i 1.mp4 -i watermark_small.png -filter_complex "[0:v][1:v]overlay=10:10, drawtext=enable='between(t,0,12)':fontfile=font.ttf:text='Some text' : fontcolor=black: fontsize=18: box=1: boxcolor=yellow@0.5:boxborderw=5: x=(w-text_w)/1.15:y=30, drawtext=enable='between(t,14,22)':fontfile=font.ttf:text='Next text' : fontcolor=black: fontsize=18: box=1: boxcolor=yellow@0.5:boxborderw=5: x=(w-text_w)/1.15:y=30" -codec:v libx264 -preset ultrafast output1.mp4

    Can someone help me to combine them together ?

  • How can I simply do color interpolation on this image and then save the image ? With RGBA channels as example

    24 août 2020, par karl-police

    So I got this GIF here :

    


    


    As you can see, it has Red, Green and Blue in it. And it also has a full transparency in it. This was composed together with FFMPEG out of images that looked exactly like that.

    


     

    


    Then, with FFMPEG I "decomposed" the RGB and Alpha channels using the filter "extractplanes".

    


    The gallery of that, in correct order starting from up to down, can be found here :

    


    https://imgur.com/a/WN0aGuW

    


    I am not sure if this actually helps me or if I'm supposed to decompose them. Because apperantly now, after decomposing them, I'm supposed to modify them, but I'm not really sure how. It's like how do I modify the red channel that only has black and white, so all at the end, will match to the specified HEX color that I want it to be to.

    


     

    


    Now, my question is. How do I exactly make the color changing happen ? Can I do this simply with JavaScript ? Is it possible to do with FFMPEG, if possible without ImageMagicks ? Maybe a programming language where not much installation is needed to do that ?

    


    What I understood is that. These channels basically contain values from 0 to 255 with black and white. I think the "brightness" is that what 0 and 255. So something inbetween, would be like grey.

    


    So basically, like we do (255,0,0) for red. In these channels, if I want red somewhere I need to put one fully white pixel on the red channel and on all the other channels, there has to be a fully black pixel.

    


    That's the concept. Now is the question, how can I do this ?

    


     

    


    At the end I want to make it look like this one as example :

    


    


    This is from a game. So basically that's how it looks like in the game. And the game files only use these RGBA template sprites.

    


     

    


    I asked a similar question here : How to change colors of an image using RGBA and more channels independently of their color

    


    But somehow, I might didn't seem to explain it that well.

    


     

    


    I made a thing here to test around with things. I guess that's nearly close, but the lines are kinda weird. jsfiddle.net/qsgazubk

    


  • FFmpeg : Trim video then add watermark with multiple text

    21 novembre 2016, par Iura Gaitur

    I want to trim a video then convert a video using FFMPEG and place a watermark with multiple texts on it. I have commands for trimming :

    ffmpeg -i 1.mp4 -ss 00:00:03 -t 00:03:08 -async 1 -c copy output1.mp4

    and for watermark with text placing

    ffmpeg -i 1.mp4 -i watermark_small.png -filter_complex "[0:v][1:v]overlay=10:10, drawtext=enable='between(t,0,12)':fontfile=font.ttf:text='Some text' : fontcolor=black: fontsize=18: box=1: boxcolor=yellow@0.5:boxborderw=5: x=(w-text_w)/1.15:y=30, drawtext=enable='between(t,14,22)':fontfile=font.ttf:text='Next text' : fontcolor=black: fontsize=18: box=1: boxcolor=yellow@0.5:boxborderw=5: x=(w-text_w)/1.15:y=30" -codec:v libx264 -preset ultrafast output1.mp4

    Can someone help me to combine them together ?

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