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Autres articles (43)

  • 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 (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (9429)

  • avformat/dashdec : fix code style and remove some empty line

    10 juillet 2019, par Steven Liu
    avformat/dashdec : fix code style and remove some empty line
    • [DH] libavformat/dashdec.c

  • avutil/frame : Document the possibility of negative line sizes

    14 novembre 2021, par Soft Works
    avutil/frame : Document the possibility of negative line sizes

    Signed-off-by : softworkz <softworkz@hotmail.com>
    
Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavutil/frame.h

  • FFMPEG : Youtube streaming quality and speed issues

    25 février 2020, par Alex Paramonov

    I am trying to make a reliable stream from my Icecast/Shoutcast servers to Youtube live. The command that I use is :

    ffmpeg -v verbose -framerate 30 -loop 1 -i /var/image.jpg -re -i http://127.0.0.1:4700/radio -c:v libx264 -preset ultrafast -b:v 2250k -maxrate 6000k -bufsize 6000k -c:a copy -ab 128k -s 1920x1080 -framerate 30 -g 60 -keyint_min 60 -f flv  rtmp://a.rtmp.youtube.com/live2/xxx

    As you can see I am using recommended bitrate for Youtube, insert keyframes every 2 seconds and streaming at 30 frames per second.
    The stream is working but after running for some time two thing are happening :

    1. FFMPEG speed falls from 1x to something like 0.998x
    2. Youtube starts complaining that video stream speed is slow, markes the quality as bad and sometimes video starts buffering.

    Why is this happening ? CPU load is normal, connectivity is ok (the stream is running on a 1Gg/s dedicated server).

    Since in my example above I am streaming a single image as a logo of the stream I also tried to generate a short 30 seconds video with that image and broadcast that video instead of an image, but that did not help as well.

    The command I used for conversion :

    ffmpeg -framerate 30 -loop 1 -i /var/image.jpg -c:v libx264 -preset ultrafast -tune stillimage  -b:v 2250k -minrate 2250k -maxrate 6000k -bufsize 6000k -framerate 30 -g 60 -keyint_min 60 -t 30 out4.mp4

    And broadcast with

    ffmpeg -stream_loop -1 -i out4.mp4  -re -i http://127.0.0.1:4700/radio -c:v copy -c:a copy  -framerate 30 -g 60 -keyint_min 60 -f flv  rtmp://a.rtmp.youtube.com/live2/xxx

    ffmpeg version is 4.1.1

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