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Autres articles (50)

  • 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

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Contribute to translation

    13 avril 2011

    You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
    To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
    MediaSPIP is currently available in French and English (...)

Sur d’autres sites (7173)

  • Revision e67d45d4ce : Merge "vpxdec : cosmetics : break some long lines"

    6 juin 2015, par James Zern

    Merge "vpxdec : cosmetics : break some long lines"

  • How to generate a video by looping an image and then concat with another very long video without re-encoding using ffmpeg ?

    23 mars 2021, par Linghao Chen

    I have an image and a very long video (1.5h).
Now I want to generate a heading video about 5 seconds by looping the image, and then concatenate it with the long video. Since the video is long, I don't want to re-encode the videos.
I have tried to generate the heading video using

    


    ffmpeg -loop 1 -i image.png -c:v libx264 -t 5 -pix_fmt yuv420p head.mp4


    


    and then

    


    ffmpeg -f concat -i list.txt -c:v copy concat.mp4


    


    where the list.txt contains

    


    file head.mp4
file longvideo.mp4


    


    I have tried these operations on two machines.
On one machine, the concatenated video has no audio. Moreover, it stucks at 5-10 seconds and directly jump to 11s.
On the other machine, the video and audio are not synchronized.

    


    To provide more information, I have checked the codecs of the two videos by

    


    ffprobe -v error -select_streams v:0 -show_entries stream=codec_name \
  -of default=noprint_wrappers=1:nokey=1 xxxxx.mp4


    


    Both of them are h264.

    


    My question is, how to generate it correctly with ffmpeg ? If it is hard using ffmpeg, is there any method to do it fast ? As far as I know, Adobe Premiere and Final Cut Pro do not export as fast as I expect because they re-encode the videos.

    


  • FFmpeg to push RTMP stream problem, the video completed by push stream takes a long time to display。

    5 juin 2020, par Sacher

    FFmpeg to push RTMP stream problem, the video completed by push stream takes a long time to display。
    
I feel that ffmpeg has a long start time。
My command is
    
ffmpeg -i rtmp://play ip/appName/streamName -threads 4 -tune zerolatency -vcodec copy -bf 0 -g 1 -preset ultrafast -acodec copy -f flv rtmp://push ip/appName/streamName
    
In this way, the startup user will wait for a long time to use, how to deal with it.

    


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