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Autres articles (75)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • 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 (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (7934)

  • Should libavcodec handle non-packed/non-byte-aligned mp3 packets ?

    27 août 2015, par Rhythmic Fistman

    I’m transcoding shoutcast streams using libavcodec and I noticed that during the day I get a few 10s’ of packets that it cannot decode without some help :

    1. Leading zero bytes before a packet sync word, e.g. 0x0000fffa

    2. non-byte aligned syncword, e.g 0x82a0fffa

    In the first case I have to toss out the zero bytes and in the second I have to shift the data up by an odd number of nibbles.

    I don’t have a watertight knowledge of the mp3 spec (is there one ?), but my impression was that the packet format was a bit oriented, not byte, so both types of packets look right to me.

    So who is in the wrong here ?

    Is it libavcodec for not parsing valid packets ?

    Or the stream encoder for producing non-standard packets ?

  • FFMPEG - Option to add or omit profiles if input is not conditional when encoding to HLS ?

    20 août 2022, par bui the vuong

    I want my ffmpeg statement to look like this :

    


    ffmpeg -i rtmp://localhost:1935/$app/$name -async 1 -vsync -1
                    if(gte(ih,240),'-c:v libx264 -c:a aac -b:v 256k -b:a 64k -g 2 -vf "scale=426:trunc(ow/a/2)*2" -tune zerolatency -preset superfast -f flv rtmp://localhost:1935/show/$name_240','')
                    if(gte(ih,360),'-c:v libx264 -c:a aac -b:v 768k -b:a 128k -g 2 -vf "scale=720:trunc(ow/a/2)*2" -tune zerolatency -preset superfast -f flv rtmp://localhost:1935/show/$name_360','')
                    if(gte(ih,480),'-c:v libx264 -c:a aac -b:v 1024k -b:a 128k -g 2 -vf "scale=960:trunc(ow/a/2)*2" -tune zerolatency -preset superfast -f flv rtmp://localhost:1935/show/$name_480','')
                    if(gte(ih,720),'-c:v libx264 -c:a aac -b:v 1920k -b:a 128k -g 2 -vf "scale=1280:trunc(ow/a/2)*2" -tune zerolatency -preset superfast -f flv rtmp://localhost:1935/show/$name_720','')
                    -c copy -f flv rtmp://localhost:1935/show/$name_src;


    


    Can I do the same with ffmpeg ?

    


  • Adding frame numbers to a video, along with total frame duration

    21 novembre 2022, par Abraham Thomas

    I need to add frame numbers to videos along with total frame duration of the video. It should show the first frame and the last frame, along with the current frame.

    


    In this forum someone had posted a command, which gives the current frame number ;
I've used this and this below command works for me :

    


    ffmpeg -i inputvid.mp4 -vf "drawtext=fontfile=Arial.ttf : text='%frame_num' : start_number=1001 : x=(w-tw)/2 : y=h-(2*lh) : fontcolor=white : fontsize=55 : box=1 : boxcolor=black : boxborderw=5" -c:a copy D :\Test\outputvid.mp4

    


    But it doesn't show the total frame duration ;
Is there a way to add to this command ; to show the first frame and last frame of the video as well (I'm on windows) ;

    


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