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Autres articles (36)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

Sur d’autres sites (6678)

  • When I use the hevc_videotoolbox encoder in ffmpeg it always prompts me the same error

    18 février 2023, par 张益铭

    when i use

    


    ffmpeg -i BabyShark.mp4 -c:v hevc_videotoolbox -b:v 6000k BabyShark1.mp4


    


    it always returns an error like

    


    


    [hevc_videotoolbox @ 0x7fec79206e00] Error encoding frame : -12905
[hevc_videotoolbox @ 0x7fec79206e00] popping : -542398533 Error
initializing output stream 0:0 — Error while opening encoder for
output stream #0:0 - maybe incorrect parameters such as bit_rate,
rate, width or height [aac @ 0x7fec79208a80] Qavg : 13693.864 [aac @
0x7fec79208a80] 2 frames left in the queue on closing Conversion
failed !

    


    


    but

    


    ffmpeg -i BabyShark1.mp4 -c:v h264_videotoolbox -b:v 6000k BabyShark2.mp4


    


    works fine.

    


    Other tutorials say that the above error is a problem of out-of-sync audio and video
But I changed a lot of videos, the error still appears, even the videos I recorded myself.
How can i fix it.

    


    My computer model is MacBook Pro 2019
I want to use GPU to convert video to H265 encoding

    


    Same problem with a computer using another M1 chip With GPU

    


  • lavc/qsvenc : set HRD buffer size

    1er décembre 2017, par Li, Zhong
    lavc/qsvenc : set HRD buffer size

    Hypothetical Reference Decoding (HRD) model assumes that data flows
    
into a buffer of the fixed size BufferSizeInKB with a constant bitrate.
    
Smaller BufferSizeInKB means smaller frame size variations,
    
but more difficult to maintain HRD.
    

    Signed-off-by : Zhong Li <zhong.li@intel.com>
    
Signed-off-by : Maxym Dmytrychenko <maxim.d33@gmail.com>
    • [DBH] libavcodec/qsvenc.c

  • How to change ffmpeg -threads settings [migrated]

    5 août 2014, par Jacob

    Working on a tube site. I’m running videos through ffmpeg on a linux dedicated server to convert to mp4.

    The server specs :

    Architecture:          x86_64
    
CPU op-mode(s):        32-bit, 64-bit
    
Byte Order:            Little Endian
    
CPU(s):                8
    
On-line CPU(s) list:   0-7
    
Thread(s) per core:    2
    
Core(s) per socket:    4
    
Socket(s):             1
    
NUMA node(s):          1
    
Vendor ID:             GenuineIntel
    
CPU family:            6
    
Model:                 60
    
Stepping:              3
    
CPU MHz:               3491.749
    
BogoMIPS:              6983.49
    
Virtualization:        VT-x
    
L1d cache:             32K
    
L1i cache:             32K
    
L2 cache:              256K
    
L3 cache:              8192K
    
NUMA node0 CPU(s):     0-7

    Issue during testing is that even only doing 4-5 at once, the server load skyrockets to an average of around 36. This is just a single person. I imagine when it opens, many people will be uploading at once.

    It seems ffmpeg tries to use all the resources available per conversion.

    I’ve heard there’s a -threads setting you can change, but I cannot find it. I have an 8 cpu server. It’s only used for conversions, so I’ve heard the best setting would be between 2 and 4. I can test it out.

    But how do I change this setting ? Everything I see online discusses this setting, but not the steps to change it.

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