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Autres articles (35)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • 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 (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

Sur d’autres sites (4047)

  • FFMpeg : 2 pass encoding, first with CRF and second with maxrate of first pass average bitrate ?

    28 septembre 2022, par Alireza Rinan

    I usually do conversions with ffmpeg 1 pass CRF 22 with maxrate 1400k for some movies to convert them to 720p and generate smallest size with best quality, the parameters I use is :

    


    c:v libx264 -vf format=yuv420p,scale=1280:-2 -crf 22 -maxrate 1400k -bufsize 7000k


    


    Doing this too much I found that apart from the black bars that reduces bitrate, the color theme, number of high movement scenes... etc affects the bitrate too much, CRF 22 makes sure you get constant quality at every scene, that makes bitrate reaches my maximum 1400k at some scenes while the reset of the scenes in some movies are barely 800k, this result the average bitrate for a same movie reaches for example about 1100k, for these movies I do the encoding again with lower maxrate
(Ex:1100k) and I get same quality with lower average rate 1000k.

    


    Now I'm wondering is there any automated method in 2 pass to get same result ?
For example doing the first pass in CRF 22 and the second pass at average bitrate of first pass to lower the quality of those bitrate rages in first pass ?

    


  • Video editing (cutting) with javascript [on hold]

    20 juillet 2019, par Tobias K

    How can I edit video in frontend (specially videocutting) ?
    I found this repo : https://github.com/Kagami/ffmpeg.js/

    But I dont know how to use it.
    How should I upload the video ?
    And how can I then cut the video ?
    I havent found any example how to use this library.

  • FFMPEG - What is the difference or relationship between -rtbufsize and -thread_queue_size ?

    5 septembre 2021, par Meaulnes

    Recording my desktop with ffmpeg (specially on Windows, less on Linux) I meet situations where/when ffmpeg complains about real time buffer size or thread queue size.
I understand that the queue size is the number of frames that can reside in the queue and thus I am incited to think that it increases the buffer size as well.
Can someone clarify these notions to me ?

    


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