Recherche avancée

Médias (3)

Mot : - Tags -/plugin

Autres articles (54)

  • 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

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (4208)

  • FFMPEG Concat Demuxer adds more time to video than expected

    5 septembre 2023, par Shreyas

    I am using ffmpeg concat demuxer to join multiple(189) videos together.
The videos are originally split from a single video using the following command :

    


    ffmpeg -ss time[2] -vsync 1 -copyts -i inputfile.mp4 -ss time[0] -to time[1] -c:a copy -c:v libx264 -b:v 800k output.mp4


    


    Thereafter I am using the following concat command :

    


    ffmpeg -f concat -safe 0 -i list.txt -c copy output.mp4


    


    The problem is that the sum of the lengths of the input videos is 24:03:520
The output.mp4 video comes out to be 24:05:550.
Which is two seconds longer than the constituent video length.

    


    I need the output video to be time accurate. How can I achieve this without reencoding the video ?

    


  • How to create video with images and different time interval using ffmpeg

    8 janvier 2013, par XCoder

    It seems duplicate :
    How to create video with images and different time interval ?
    But it ain't duplicate since the author of the above question has framed the wrong title because the images are displayed for fixed time-interval.

    What I want to do is this

    1. Image 1 : 5 seconds

    2. Image 2-5 : 10 seconds

    3. Image 6 : 4 seconds

    Please let me know how can I achieve this using ffmpeg. I tried googling but found nothing as such.

  • Absolute timestamp as MP4 start time

    14 juin 2016, par galbarm

    I’d like to store the exact start time a video was recorded on, inside its mp4 container.
    I need a millisecond accuracy (i.e. year,month,day,hour,sec,milli).
    Such an accuracy requires 8 bytes.

    The only standard way I found to store a video creation time is to use the mvhd/tkhd/mdhd boxes creation_time field.
    But according to the base media file format spec, the field only gives a granularity of seconds :

    creation_time is an integer that declares the creation time of this
    track (in seconds since midnight, Jan. 1, 1904, in UTC time)

    In version 0 the field size was 4 bytes, while in version 1 it was increased to 8 bytes. But the description remained unchanged so it can still only reflect a timestamp in up to second granularity. (for maintaining backward compatibility maybe ?)

    So finally, is there a standard way to store a single absolute timestamp with millisecond accuracy in a mp4 container ?
    If the only way to do it, is to store it as a custom metadata, is there an agreed common way to do it according to ?

Navigation