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  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
    sur le web 2.0 et dans les entreprises qui en vivent.
    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

  • Activation de l’inscription des visiteurs

    12 avril 2011, par

    Il est également possible d’activer l’inscription des visiteurs ce qui permettra à tout un chacun d’ouvrir soit même un compte sur le canal en question dans le cadre de projets ouverts par exemple.
    Pour ce faire, il suffit d’aller dans l’espace de configuration du site en choisissant le sous menus "Gestion des utilisateurs". Le premier formulaire visible correspond à cette fonctionnalité.
    Par défaut, MediaSPIP a créé lors de son initialisation un élément de menu dans le menu du haut de la page menant (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (4064)

  • FFmpeg, overlay, black detect, intermission — too much to ask ?

    11 avril 2016, par Timo Mika Gläßer

    I have two streams (see the schematic in the picture below). One is the main video-stream which is constantly on and one is a picture-in-picture stream which have intermissions. Both are fed to ffmpeg as live streams and I want to redistribute them as a merged live stream again.

    Is there a way to either have a static image for the picture-in-picture stream when it has no data (i.e. using blackdetect) or completely hiding it temporarily ?

    Screenlayout

  • How can I add "retro-looking" black round cornert to my videos ?

    4 mars 2020, par user3018558

    I’m looking to add (e.g. overlay) some retro/cinematic effect to my video and specifically the black rounded corners.
    Can this be achieved via ffmpeg ? I’m actually using Handbrake mainly but since it relies on ffmpeg I guess I could pass something as a parameter in Handbrake’s Video/Advanced/options to affect the output file ?

    I mean one option would be to add an overlay I guess like :
    enter image description here

    But considering the input files have different resolution/aspect-ration I would ideally be looking to have this dynamically added to the output file.

    Any idea/tip ?

    Thanks

  • FFMPEG two black frames in the beginning when converting mp4 aac to mov pcm [closed]

    12 octobre 2023, par Veikka

    I'm trying to convert mp4 h265 aac file to mov 265 pcm16sle file using ffmpeg withoat touching the video stream. When opening the file in DaVinci Resolve, there is two black frames in beginning.

    


    I used this ffmpeg command :

    


    ffmpeg -i file.mp4 -map_metadata 0 -c:v copy -c:a pcm_s16le file.mov


    


    For some reason this command changes timestamp info :

    


    file.mp4
---
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 519000,
"duration": "20.760000",
"bit_rate": "80688676",

file.mov
---
"start_pts": 2000,
"start_time": "0.080000",
"duration_ts": 517000,
"duration": "20.680000",
"bit_rate": "81000818",


    


    I also get this error when converting file :

    


    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x565392b65800] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1000


    


    I found this bug report, but there didn't found any fixes to my problem.

    


    file.mp4 edit lists looks like this :

    


    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] track[0].edit_count = 1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] Processing st: 0, edit list 0 - media time: 1000, duration: 519000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] st: 0 edit list 1 Cannot find an index entry before timestamp: 1000.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] track[1].edit_count = 1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561fc98ff800] Processing st: 1, edit list 0 - media time: 0, duration: 996353


    


    AAC timecode and H265 has almost same duration withoat the media time: 1000 starting time :

    


    AAC timebase is 1/48000

    


    996353/48000 = 20.75735416666666666667


    


    H265 timebase is 1/25000

    


    519000/25000 = 20.76