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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 (...)

  • 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 (...)

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

Sur d’autres sites (4387)

  • Delay in displaying a video stream after streaming by libavformat

    15 janvier 2014, par Blue Sky

    I am using libavformat library to stream a video at a network address like udp ://127.0.0.1:1000. I use ffplay to display the received video stream at the network address. However, the video appears few second later (e.g. 5 6 seconds) at ffplay on the same machine. Do you know what is the reason ?

    More info :

    I have written my own streaming application using libavformat. When I stream a 3sec 1080p video at 25fps, ffplay does not show anything. If I repeat streaming the same video once again, this time, ffplay starts displaying the previous streamed video as well as the current video. So, it looks like ffplay waits for a buffer to be filled up by some amount, and then displays the stream. But am I correct ?

  • ffmpeg VBR -> CBR conversion and streaming of MPEG-2 TS video files

    26 juillet 2017, par Georgе Stoyanov

    I am trying to convert a source VBR SPTS MPEG-2 TS file into CBR using ffmpeg. The code I am using is the following :

    #!/bin/bash
    

    
pkill ffmpeg
    

    
ffmpeg \
    
        -re -i source.ts -c copy \
    
        -muxrate 18000K \
    
        -f mpegts \
    
        udp://destination_ip:1234?pkt_size=1316

    The source VPID bitrate is 10Mbps and the APID is 296Kbps. So according to my understanding this code should deliver 18Mbps CBR where the difference between the muxrate and the bitrate of all the PIDs is filled with null packets.

    The problem is that the output is far from perfect. The overall bitrate is semi-CBR at best. It ranges between 12Mbps and 15Mbps and I see a lot of PCR accuracy and PCR repetition errors along with CC errors both on the VPID and APID.

  • How to save a vedostream on an event using ffmpeg

    26 janvier 2015, par Ludo

    I want to record short video sequences of an online stream (IP CCTV or Internet) on a defined event.

    For example : I want to have two minutes before and one minute after an event occures stored in a output file.

    Is it possible to do this using ffmpeg (avconv) and what are the parameters to use.

    Thanks for your help !

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