Recherche avancée

Médias (91)

Autres articles (63)

  • 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 (...)

  • 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

  • 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 (...)

Sur d’autres sites (7018)

  • Broadcast to youtube live via rtmp using vlc from terminal

    7 novembre 2016, par devprashant

    When run :

    cvlc -vvv 'Bootstrap Tutorial.mp4' --sout 
    
'#rtp{dst=rtmp://a.rtmp.youtube.com/live2,name=pa1p-8c4m-zzvp-5j6t,mux=ts}'

    i got this debug : http://www.wepaste.com/vlcdebug/

    when run :

    cvlc -vvv 'Bootstrap Tutorial.mp4' --sout 
    
'#std{access=rtmp,dst=rtmp://a.rtmp.youtube.com/live2/pa1p-8c4m-zzvp-5j6t,mux=ts}'  

    i got this debug http://www.wepaste.com/vlcdebug2/

    how to stream live video and audio to youtube using vlc from terminal.

    Resources followed :

    1. https://blog.vucica.net/2015/08/streaming-to-youtube-live-with-vlc-and-ffmpeg.html
    2. https://forum.videolan.org/viewtopic.php?f=14&t=130520&p=436913&hilit=rtmp+youtube#p436913
    3. Problems Starting VLC HTTP Stream with Servlet
    4. https://forum.videolan.org/viewtopic.php?f=4&t=112221&p=380232&hilit=rtmp+youtube#p380232

  • Grayscale streaming from raw video using FFMPEG

    31 août 2022, 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

    


  • 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

Navigation