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Autres articles (21)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • 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 (4734)

  • x264 rate control set

    2 juillet 2015, par chinayin

    I have been learning x264 encode for months. What I need is to control the rate and get an average bitrate. Following is my set, I got an average bitrate but the picture quality is bad, so I need your suggestion or something that can help me learn more about x264.

    Params.rc.i_rc_method = X264_RC_ABR ;
    
Params.rc.i_bitrate = nBitRate*0.65/1000  ;
    
Params.rc.i_vbv_buffer_size = nBitRate/1000;
    
Params.rc.i_vbv_max_bitrate = nBitRate*0.65/1000 ;
    
Params.rc.f_vbv_buffer_init = 1.0 ;
    
Params.rc.f_rate_tolerance = 1.0 ;                              
    
Params.i_fps_num =  ParamIn.dFrameRate*0.6 ;
    
Params.i_fps_den = 1 ;
    
Params.i_width = ParamIn.nWidth ;
    
Params.i_height = ParamIn.nHeight ;

  • Video streaming with ipCamera in iphone

    6 juillet 2013, par user1120998

    I am developing app for the connecting ip camera and get stream. I don't know how to convert stream into video. I have analysed, and then i tried FFMPEG library. But i did not get correct url for ios with FFMPEG. Can you suggest the guide for implementation.

    Now i am integrating ffmpeg, when i integrated i got the error when opening avformat_find_stream_info() function. I used the increase or less the value of pFormatCtx->max_analyze_duration. But no solution for this.

    [mjpeg @ 0x8b85000] max_analyze_duration 1000 reached at 40000
    [mjpeg @ 0x8b85000] Estimating duration from bitrate, this may be inaccurate

    Pls help how to solve this.

  • FFmpeg with PHP causes Internal Server Error

    19 novembre 2015, par Scott Heath

    I have a PHP script that calls exec() to convert video files using ffmpeg. The script works fine with smaller files, but larger files, usually around 20MB, produce a 500 Internal Server Error after the conversion has run for about 45 seconds.

    The max_execution_time is set to 600 seconds (10 minutes) and the max post and upload sizes are set to 1000 MB. The server is Unix based and is not running in safe mode.

    Although the issue only happens with larger sizes, I’m not even sure it’s a file size issue. The script will pass with a 12.6MB MOV file but will fail with an 11MB MP4 file.

    Below is the exec() line from my script :

    exec('ffmpeg -y -i '.escapeshellarg($uploadFile).' -vcodec libx264 -ab 128k -ac 2 -b 640k -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -maxrate 10M -bufsize 10M -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 '.$convertFile);

    Thanks !

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