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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (2523)

  • C++ : Combine 4 YV12 images to a single image (4 quadrants). FFMPEG ?

    1er juin 2016, par Paul Knopf

    I have 4 YV12 buffers that I need to combine to a single buffer (4 quadrants).

    I could manually write a bunch of memcpy stuff with offsets, but I fear performance issues.

    Is there an FFMPEG method that I can use to achieve this ?

    AVFrame* topLeft = ...
    
AVFrame* topRight = ...
    
AVFrame* bottomLeft = ...
    
AVFrame* bottomRight = ...
    
AVFrame* destination = ... // topLeft-size + topRight->size + bottomLeft->size + bottomRight ->size

    Maybe there is a method with a similar signature here ?

    void blend_image(AVFrame* src, AVFrame dest, int x, int y);

    Then...

    blend_image(topLeft, destination, 0, 0);
    
blend_image(topRight, destination, 1920, 0);
    
blend_image(bottomLeft, destination, 0, 1080);
    
blend_image(bottomRight, destination, 1920, 1080);

    Any guidance would be greatly appreciated.

  • Can I make this FFMPEG animation smoother ?

    21 mai 2021, par mrmaker12345

    I have a basic ffmpeg command which zooms an images from 150% to 100% and overlays onto a stretched and blurred version of itself. All works great, except the zoom effect is very shaky. Is there any way to make this animation smoother ?

    


    ffmpeg -y -loop 1 -i image.jpg -filter_complex "[0:v]scale=1920:1080,boxblur=10:10,setsar=1[bg];[0:v]scale=-1:(ih*1.5)-(ih*1.5)*n/900:eval=frame[fg];[bg][fg]overlay=x=(W-w)/2:y=(H-h)/2[out]" -map "[out]" -t 10 -r 60 "out.mp4"


    


  • FFmpeg : With 1 720p and 1 1080p video, how can I upscale the 1st one to 1080p and hstack them in one command ?

    4 juillet 2021, par YousufSSyed

    This is the command I have right now, but it only works for videos with the same height :

    


    ffmpeg -i "video 1.mp4" -i "video 2.mp4" -c:a copy c:v h264_amf -filter_complex "hstack,format=yuv420p" "Output video.mp4" 


    


      

    • video 1.mp4 is the 720p one

      • 


    • video 2.mp4 is the 1080p one

      • 


    


    I need to keep the audio for the 1st video but not the 2nd one, the 2nd one doesn't have audio. I tried adding [0:v]scale=-1:1080; before hstack but that doesn't work.

    


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