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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 (...)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

Sur d’autres sites (5848)

  • lavf : add new struct for data private to generic layer

    13 octobre 2024, par Anton Khirnov
    lavf : add new struct for data private to generic layer

    Trivial for now, will become more useful in future commits, as many
    
fields from FFFormatContext should not be visible to individual
    
(de)muxers.
    • [DH] libavformat/avformat_internal.h
    • [DH] libavformat/options.c

  • ffmpeg complex filter pip loop not working

    4 août 2021, par Dzseti

    I am using an ffmpeg complex filter to :

    


      

    1. turn a number of images into a slideshow

      2. 


    2. scale the slideshow to 1/6th of its original size

      3. 


    3. loop the slideshow infinitely

      4. 


    4. set the looping slideshow as a picture-in-picture over another looping video

      5. 


    


    then add audio from another file which determines the maximum length of the final video.

    


    Everything is working except step 3.

    


    Here is my code (broken down into individual lines) :

    


    ffmpeg -y 
-loop 1 -t 5.5 -i /uploads/2021/07/slide04-scaled.jpg 
-loop 1 -t 5.5 -i /uploads/2021/07/Slide05-scaled.jpg 
-loop 1 -t 5.5 -i /uploads/2021/07/Slide06-scaled.jpg 
-i /slowwmo-videos/intro.mp4 
-i /uploads/2021/07/busy_bees_01.mp3 
-filter_complex 
"
[1]fade=d=0.5:t=in:alpha=1,setpts=PTS-STARTPTS+5/TB[a1];
[2]fade=d=0.5:t=in:alpha=1,setpts=PTS-STARTPTS+10/TB[a2];
[0][a1]overlay[b2];
[b2][a2]overlay[slides];
[slides]loop=loop=-1,scale=iw/6:ih/6,format=yuv420p,fps=fps=25[pip];
[3][pip]overlay=W-w-100:200[v]
" 
-map [v]:v:0 -map 4:a:0 -vcodec libx264 -profile:v main -video_track_timescale 25000 -pix_fmt yuv420p -s 1280x720 -acodec aac -af aresample=44100 -shortest /slowwmo-videos/busy_bees/7494.ts


    


  • How to decode H264 stream to image byte array with ffmpeg in C# ?

    1er juin 2022, par massivemoisture

    I have an application in C# that receives H264 stream from a socket.

    


    The stream is in Annex B format. I want to decode the stream to individual image as a byte array.

    


    I saw this code snippet using PyAV, courtesy of leng-yue (https://github.com/leng-yue/py-scrcpy-client/blob/main/scrcpy/core.py) :

    


    raw_h264 = self.__video_socket.recv(0x10000)
                packets = codec.parse(raw_h264)
                for packet in packets:
                    frames = codec.decode(packet)
                    for frame in frames:
                        frame = frame.to_ndarray(format="bgr24")
                        if self.flip:
                            frame = cv2.flip(frame, 1)
                        self.last_frame = frame
                        self.resolution = (frame.shape[1], frame.shape[0])


    


    How can I do something similar with ffmpeg but in C# and the output is a byte array in BGR24 ? Thank you !

    


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