Recherche avancée

Médias (1)

Mot : - Tags -/epub

Autres articles (24)

  • MediaSPIP Core : La Configuration

    9 novembre 2010, par

    MediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
    Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • 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.

Sur d’autres sites (3504)

  • How to use ffmpeg to stream x11 via netcat ?

    28 janvier 2015, par alasin

    These are the commands I’m trying to use

    Server side :

    ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0+10,20 -f avi - | nc -l 1500

    Client side :

    nc <server ip="ip"> 1500 | mplayer -vo x11 -cache 3000 - 
    
</server>

    It seems to be streaming on the server side but client is not able to view the stream.

  • Grayscale streaming from raw video using FFMPEG

    21 janvier 2015, par user1657208

    I have a raw video file (testvideo_1000f.raw) that I am trying to stream in gray scale using ffmpeg and output the grayscale video to output.swf. The command I am using to do this is :

    ffmpeg/ffmpeg -qmin 2 -qmax 31 -s 320x240 -f rawvideo -flags gray -pix_fmt:output gray -an -i testvideo_1000f.raw output.swf

    However, the result from this command is a video stream that is in gray scale but still contains some of the chrominance data. The output from this command is pasted below :

        3 [volta]/home/student/elliott> ffmpeg/ffmpeg -qmin 2 -qmax 31 -s 320x240 -f rawvideo -flags gray -pix_fmt:output gray -an -i testvideo_1000f.raw output.swf
    
ffmpeg version N-41632-g2b1fc56 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jul 29 2012 10:27:26 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
    
  configuration: 
    
  libavutil      51. 58.100 / 51. 58.100
    
  libavcodec     54. 25.100 / 54. 25.100
    
  libavformat    54.  6.101 / 54.  6.101
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     2. 80.100 /  2. 80.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
*** CHOOSING 8
    
[rawvideo @ 0xdda9660] Estimating duration from bitrate, this may be inaccurate
    
Input #0, rawvideo, from 'testvideo_1000f.raw':
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
   Stream #0:0: Video: rawvideo (Y800 / 0x30303859), gray, 320x240, 25 tbr, 25 tbn, 25 tbc
    
File 'output.swf' already exists. Overwrite ? [y/N] y
    
w:320 h:240 pixfmt:gray tb:1/25 fr:25/1 sar:0/1 sws_param:flags=2
    
[ffmpeg_buffersink @ 0xddb7b40] No opaque field provided
    
[format @ 0xddb7d40] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
    
[auto-inserted scaler 0 @ 0xddb7920] w:320 h:240 fmt:gray sar:0/1 -> w:320 h:240 fmt:yuv420p sar:0/1 flags:0x4
    
*** CHOOSING 8
    
Output #0, swf, to 'output.swf':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
   Stream #0:0: Video: flv1, yuv420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo -> flv)
    
Press [q] to stop, [?] for help
    
Truncating packet of size 76800 to 1 2875kB time=00:00:40.84 bitrate= 576.7kbits/s    
    
frame= 1500 fps=1035 q=24.8 Lsize=    4194kB time=00:01:00.00 bitrate= 572.6kbits/s    
    
video:4166kB audio:0kB global headers:0kB muxing overhead 0.669245%

    I am fairly new to FFMPEG and I am afraid I am using either the wrong syntax or the wrong parameters in my command line. For some reason, the format of the output is yuv420p. I have tried searching for this answer all over but have had no luck. Could anyone please help me and tell me why the output is being formatted in yuv420p when I am giving the command for it to be in 8bit grayscale ? Any help would be greatly appreciated. Thank you.

    Marc Elliott

  • AIR to ffmpeg via argb frames transfer

    4 mai 2014, par mika

    Hey I’m running into a similar problem as : Converting RGB to YUV, + ffmpeg

    From AIR, I figured the encoding was too long to render frames at a reasonable rate - so I exported the argb ByteArray from bitmap.getPixels(rect) directly to a file.

    So for a 30sec flash animation, I’d export let’s say 1500 frames to 1500 .argb files.

    This method works great. I was able to render HD video using the ffmpeg cmd :

    ffmpeg -f image2 -pix_fmt argb -vcodec rawvideo -s 640x380 -i frame_%d.argb -r 24 -qscale 1.1 -s 640x380 -i ./music.mp3 -shortest render-high.mpg

    So far so good ! However, inbetween the two processes we need to store those 3gb of data.

    I then tried to append all the argb to one single file and have ffmpeg consume it, but didn’t get anything good out of it... Also tried messing tcp/udp but getting stuck...

    Does anyone know of a way to streamline that process and hopefully pipe both Air and ffmpeg together ?

Navigation