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Autres articles (58)

  • 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 (15688)

  • avcodec/jpegxl : add Jpeg XL image codec

    17 avril 2022, par Leo Izen
    avcodec/jpegxl : add Jpeg XL image codec

    This commit adds support to libavcodec to read
    
encoded Jpeg XL images. Jpeg XL is intended to be an
    
extended-life replacement to legacy mjpeg.
    • [DH] MAINTAINERS
    • [DH] libavcodec/codec_desc.c
    • [DH] libavcodec/codec_id.h

  • qt-faststart never finish

    19 avril 2012, par Shakti Singh

    I am trying to use qt-faststart on MP4 videos to make the streaming fast but the qt-faststart command is never get finish, It is running from the last one and half hour and video file is of 14MB only.

    The command is showing the ftyp and free as output

    the output look like this

    ftyp 2324322  32
    
free 2324456   8

    and the number is keep increasing with the output. No error is shown.

    The MP4 video is converted from FLV video using the FFMPEG.

    Generally it show the output like this but with my installation of qt-faststart I never get this ouput

        patching stco atom...
    
    patching stco atom..
    
    writing ftyp atom...
    
    writing moov atom...
    
    copying rest of file ...

    What could be the issue ?
    Is there anything wrong with the installation of qt-faststart ?

    I am on Linux 2.6.18-128.2.1.el5PAE i686

  • How to insert bullet screen comments into a video by using ffmpeg ?

    7 septembre 2019, par Saeron Meng

    I would like to add some real-time comments in my video but I do not know how to use ffmpeg to realize this. The comments are like screen bullets through the screen, scrolling from right to left.

    My thought is to count the length of the comments and define speeds for them to move. Don’t worry about the source of the comments, I have already gotten them saved as an xml file. Also, I can transfer it into srt. For instance :

    <chat timestamp="671.195">
    
    <ems utctime="1562584080" sender="Bill">
    
        <richtext></richtext>
    
    </ems>
    
</chat>
    
<chat timestamp="677.798">
    
    <ems utctime="1562584086" sender="Jack">
    
        <richtext></richtext>
    
    </ems>
    
</chat>

    The final result is like this (I did not find an example displayed in English), these fancy characters can move horizontally :

    example

    I have searched some solutions on the Internet, most of which talk about how to write ass/srt files and add motionless subtitles. Like this :

    3
    
00:00:39,770 --> 00:00:41,880
    
When I was lying there in the VA hospital ...
    

    
4
    
00:00:42,550 --> 00:00:44,690
    
... with a big hole blown through the middle of my life,
    

    
5
    
00:00:45,590 --> 00:00:48,120
    
... I started having these dreams of flying.

    ffmpeg -i infile.mp4 -i infile.srt -c copy -c:s mov_text outfile.mp4

    But I need another kind of "subtitles" which can move.

    So my question is, how to modify the ffmpeg command and the template of srt file so as to arrange the subtitles from the top to the bottom and let them move from right to left ?

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