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  • 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

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • 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 (...)

Sur d’autres sites (9672)

  • What makes the bitrate of dash stream output low as compared to bitrate of input mp4 video

    7 janvier 2021, par Chinmaey Shende

    I used ffmpeg to convert bbb.mp4 to dash stream. I used the ffprobe to get the bitrates of input and output (shown below)
For the same resolution video 1920x1080 input has bit rate 2998 kb/s where as output has bitate of 20 kb/s.
My profile is set to "-b:v:0 200K -s:v:0 640x360 -b:v:1 600K -s:v:1 852x480 -b:v:2 4000K -s:v:2 1920x1080".
I am trying to understand what determines the output bit rate for the dash stream ?
Why does my output different from the input profile set in ffmpeg command

    



    Input video stream - bbb.mp4

    



    '''  Duration: 00:10:34.53, start: 0.000000, bitrate: 3481 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2998 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)'''


    



    Output :

    



    '''  Duration: 00:10:34.60, start: 630.000000, bitrate: 20 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 20 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    major_brand     : iso5
    minor_version   : 512
    compatible_brands: iso5iso6mp41
    encoder         : Lavf58.42.100
  Duration: 00:10:34.60, start: 630.000000, bitrate: 4 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x480 [SAR 640:639 DAR 16:9], 4 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    major_brand     : iso5
    minor_version   : 512
    compatible_brands: iso5iso6mp41
    encoder         : Lavf58.42.100
  Duration: 00:10:34.60, start: 630.000000, bitrate: 1 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x360 [SAR 1:1 DAR 16:9], 1 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
'''


    



    I tried to look in ffprobe documentation I could not find the definition of the bit_rate field output in ffprobe.

    



    Can you please help me to understand this ?

    


  • Sony Launches Less Useful Z5U

    18 novembre 2009

    Sony today announced the NXCAM, an AVCHD-based "professional" camera which bears a striking resemblance to the EX1 and Z5U.

    You get 1080p exmor CMOS chips (presumably 1/3" ?) and records AVCHD to the highly popular (sarcasm) Memory Stick media.

    Pricing hasn’t been announced, but presumably it’ll be in the $4000 range like the Z5U. I’ll be curious to see how this shakes out in the market.

  • Anomalie #3398 : Date du thread modifiée lorsqu’un message de forum est soumis, sans tenir compte ...

    14 mai 2015, par marcimat ☺☮☯♫

    Complété par http://zone.spip.org/trac/spip-zone/changeset/89344 et http://zone.spip.org/trac/spip-zone/changeset/89345

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