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  • Creating farms of unique websites

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    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
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  • Les notifications de la ferme

    1er décembre 2010, par

    Afin d’assurer une gestion correcte de la ferme, il est nécessaire de notifier plusieurs choses lors d’actions spécifiques à la fois à l’utilisateur mais également à l’ensemble des administrateurs de la ferme.
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Sur d’autres sites (6071)

  • As part of my program that I am writing I am using ffmpeg. I am debugging. Why would ffmpeg run slower on a GPU than a CPU when doing mp4 compression ? [closed]

    6 mai 2023, par user875234

    I'm running it on modern equipment with latest drivers. I use it to compress video files, like so :

    


    ffmpeg -i 20230502_200913.mp4 -vcodec libx265 -crf 28 -vf "scale=trunc(iw/10)*2:trunc(ih/10)*2" output.mp4


    


    that command runs in 160 seconds on the CPU. but if I use the GPU, like so :

    


    ffmpeg -hwaccel cuda -i 20230502_200913.mp4 -vcodec libx265 -crf 28 -vf "scale=trunc(iw/10)*2:trunc(ih/10)*2" output.mp4


    


    it actually takes 280 seconds. And again, these are same era CPU and GPU. I can see it uses 100% of the GPU when running on the GPU but only 50% of the CPU when running on the CPU. I expected it to run much faster on the GPU than the CPU.

    


    Am I missing something ?

    


  • FFmpeg : How to convert vertical/horizontal video (any size) with black sides, to 1080x1350 vertical video with blurred background sides/bottom-top

    12 octobre 2023, par devweb

    i've been trying to make a ffmpeg 'filter_complex' code to make what i need but i can't, i've used some codes here on stack but non works for what i need, each is like for a different size/dimension.
I'm trying to make videos like Instagram posts (tallest allowed) : 1080 x 1350

    


    Bassically, horizontal videos with blurred sides or bottom-top.

    


    Any help will be awesome, thanks !

    


    This is the principal which i tried

    


    Something like this :

    


    Example 1
Example 2

    


    Here some codes i tried to worked with and changing stuff :
filter_complex='[0:v]scale=1080*2:1350*2,boxblur=luma_radius=min(h\\,w)/20:luma_power=1:chroma_radius=min(cw\\,ch)/20:chroma_power=1[bg];[0:v]scale=-1:1080[ov];[bg][ov]overlay=(W-w)/2:(H-h)/2,crop=w=1080:h=1350'

    


    filter_complex='[0:v]scale=ih*5/4:-1,crop=h=iw*4/5,gblur=sigma=20[blurred];[blurred][0:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2'

    


    filter_complex='[0:v]scale=1080:1350,setsar=1,gblur=sigma=20[blurred];[blurred][0:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2'

    


  • How to record part of the Activity (ex : Linear layout ,relative layout) and export as a video ?

    22 avril 2019, par Elangovan S

    i want record a video from particular view. the example I have video view inside of my relative layout and text view, and I apply some animation to text view finally I want to record video both video view and text view and make a video. i tried ffmpeg continuously taking screenshot every frame and make a video but its not smooth , take too much time. is there any way to achieve this ? help me with this.

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