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Autres articles (110)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
    Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
    La documentation de l’utilisation du script d’installation (...)

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

  • Que fait exactement ce script ?

    18 janvier 2011, par

    Ce script est écrit en bash. Il est donc facilement utilisable sur n’importe quel serveur.
    Il n’est compatible qu’avec une liste de distributions précises (voir Liste des distributions compatibles).
    Installation de dépendances de MediaSPIP
    Son rôle principal est d’installer l’ensemble des dépendances logicielles nécessaires coté serveur à savoir :
    Les outils de base pour pouvoir installer le reste des dépendances Les outils de développements : build-essential (via APT depuis les dépôts officiels) ; (...)

Sur d’autres sites (4364)

  • Encoding videos for use with Adobe Live Streaming

    10 mai 2016, par FiddleMeRagged

    I have an original video coded at 20Mbps, 1920x1080, 30fps and want to convert it down to be 640x480 30fps at a range of (3 different) bitrates for use by Adobe Live Streaming.

    Should I use ffmpeg to resize and encode at the 3 bitrates then use f4fpackager to create the f4m f4f and f4x files or just use ffmpeg to reduce the resolution and then f4fpackager to encode the relevant bitrates ?

    I’ve had several tries so far, but when encoded the videos seem to play at a much larger bitrate than they’ve been encoded at. For example, if I set up the OSMF to play from my webserver, I’d be expecting my best encoded video to play at 1,500kbps but it’s way above that.

    Has anyone had any experience of encoding for use like this ?

    I’m using the following options to f4fpackager

    --bitrate=1428 --segment-duration 30 --fragment-duration 2

  • Linphone OSx msx264 encryption VGA takes 97% CPU, why ?

    11 septembre 2013, par Maxim Shoustin

    I have problem and today don't know how to fix it or even from where to start.

    I have Linphone application that uses msx264 plugin.

    All stuff I run on OSx and my ffmpeg version installed from port , I didn't using selfupdate for port

    bash-3.2# port installed ffmpeg-devel
    

    
The following ports are currently installed:
    
 ffmpeg-devel @20130205_0+gpl2
    
 ffmpeg-devel @20130328_0 (active)
    
 ffmpeg-devel @20130328_0+gpl2

    So I compiled and build msx264, no errors.

    Now I try to send video over CIP resolution VGA (640x480) and get huge delay 8-9 seconds, even self-view I see in big delay.

    when I configure CIF (352x288), all seems fine.

    It's really strange that self-view camera has delay 4-5 sec.

    So from logs during the session I found that msx264 plugin takes 97% CPU

    On PC (windows 7) the same code runs fine, even HD I don't see any problems.

    What is the problem should be ?

    warning: Video MSTicker: We are late of 32146 miliseconds.
    
message: Filter MSRtpRecv is not scheduled; nothing to do.
    
message: ===========================================================
    
message:              AUDIO SESSION'S RTP STATISTICS                
    
message: -----------------------------------------------------------
    
message: sent                                          2344 packets
    
message:                                             403168 bytes  
    
message: received                                      2038 packets
    
message:                                             350536 bytes  
    
message: incoming delivered to the app               325080 bytes  
    
message: lost                                             0 packets
    
message: received too late                              123 packets
    
message: bad formatted                                    0 packets
    
message: discarded (queue overflow)                      17 packets
    
message: ===========================================================
    
message: ms_filter_unlink: MSAuRead:0x7fb5a34955b0,0-->MSResample:0x7fb5aa917820,0
    
message: ms_filter_unlink: MSResample:0x7fb5aa917820,0-->MSSpeexEC:0x7fb5a34f6d20,1
    
message: ms_filter_unlink: MSSpeexEC:0x7fb5a34f6d20,1-->MSVolume:0x7fb5a3493450,0
    
message: ms_filter_unlink: MSVolume:0x7fb5a3493450,0-->MSTee:0x7fb5a3498e40,0
    
message: ms_filter_unlink: MSTee:0x7fb5a3498e40,0-->MSUlawEnc:0x7fb5a3499410,0
    
message: ms_filter_unlink: MSUlawEnc:0x7fb5a3499410,0-->MSRtpSend:0x7fb5aa910ba0,0
    
message: ms_filter_unlink: MSRtpRecv:0x7fb5a3400170,0-->MSUlawDec:0x7fb5a34933c0,0
    
message: ms_filter_unlink: MSUlawDec:0x7fb5a34933c0,0-->MSGenericPLC:0x7fb5aa91b040,0
    
message: ms_filter_unlink: MSGenericPLC:0x7fb5aa91b040,0-->MSDtmfGen:0x7fb5a6585f00,0
    
message: ms_filter_unlink: MSDtmfGen:0x7fb5a6585f00,0-->MSVolume:0x7fb5aa917790,0
    
message: ms_filter_unlink: MSVolume:0x7fb5aa917790,0-->MSTee:0x7fb5aa914fc0,0
    
message: ms_filter_unlink: MSTee:0x7fb5aa914fc0,0-->MSEqualizer:0x7fb5a3498f50,0
    
message: ms_filter_unlink: MSEqualizer:0x7fb5a3498f50,0-->MSSpeexEC:0x7fb5a34f6d20,0
    
message: ms_filter_unlink: MSSpeexEC:0x7fb5a34f6d20,0-->MSResample:0x7fb5aa9178b0,0
    
message: ms_filter_unlink: MSResample:0x7fb5aa9178b0,0-->MSAuWrite:0x7fb5a3499380,0
    
message: ms_filter_unlink: MSTee:0x7fb5a3498e40,1-->MSAudioMixer:0x7fb5aa914df0,0
    
message: ms_filter_unlink: MSTee:0x7fb5aa914fc0,1-->MSAudioMixer:0x7fb5aa914df0,1
    
message: ms_filter_unlink: MSAudioMixer:0x7fb5aa914df0,0-->MSFileRec:0x7fb5aa911020,0
    
message: Audio MSTicker thread exiting
    
message: ===========================================================
    
message:                   FILTER USAGE STATISTICS                  
    
message: Name                Count     Time/tick (ms)      CPU Usage
    
message: -----------------------------------------------------------
    
message: MSX264Enc           321       138.147             97.1677   
    
message: MSResample          8076      0.0550274           0.97085   
    
message: MSSpeexEC           4302      0.0873765           0.821276  
    
message: MSH264Dec           291       0.880267            0.561463  
    
message: MSRtpSend           6174      0.012353            0.166623  
    
message: MSRtpRecv           6174      0.0115132           0.155295  
    
message: MSOSXGLDisplay      375       0.0376117           0.0308912 
    
message: MSAudioMixer        4695      0.00249638          0.0256072 
    
message: MSV4m               1480      0.00740446          0.0239537 
    
message: MSUlawEnc           4038      0.0019542           0.0172411 
    
message: MSTee               6540      0.000698976         0.00998688
    
message: MSAuRead            4695      0.00095017          0.0097466 
    
message: MSUlawDec           1890      0.00205553          0.00849059
    
message: MSVolume            5928      0.000633159         0.00820007
    
message: MSFileRec           4695      0.000722743         0.00741371
    
message: MSDtmfGen           4695      0.0005              0.00512887
    
message: MSGenericPLC        4695      0.000429514         0.00440585
    
message: MSAuWrite           4038      0.000364199         0.00321319
    
message: MSEqualizer         1890      0.000250661         0.00103538
    
message: MSSizeConv          322       0.00104334          0.000736128
    
message: MSJpegWriter        290       0.000694158         0.00044124
    
message: MSPixConv           322       0.000405573         0.000286151
    
message: MSFilePlayer        0         0                   0         
    
message: MSVoidSink          0         0                   0         
    
message: ===========================================================
    
warning: Video MSTicker: We are late of 32256 miliseconds.
    
message: v4m video device closed.
    
message: Filter MSRtpRecv is not scheduled; nothing to do.
    
message: ===========================================================
    
message:              VIDEO SESSION'S RTP STATISTICS                
    
message: -----------------------------------------------------------
    
message: sent                                          1311 packets
    
message:                                            1517528 bytes  
    
message: received                                      1783 packets
    
message:                                            1049010 bytes  
    
message: incoming delivered to the app               986868 bytes  
    
message: lost                                             0 packets
    
message: received too late                                0 packets
    
message: bad formatted                                    0 packets
    
message: discarded (queue overflow)                       0 packets
    
message: ===========================================================

    In addition the application shows me delay status, from logs :

    message:: Dialog [0x7fb5a7634940]: now updated by transaction [0x7fb5aa9685d0].
    
warning: Video MSTicker: We are late of 20415 miliseconds.
    
warning: Video MSTicker: We are late of 20564 miliseconds.
    
message:: A SPS is being sent.
    
message:: A PPS is being sent.
    
warning: Video MSTicker: We are late of 20609 miliseconds.
    
warning: Video MSTicker: We are late of 20636 miliseconds.
    
warning: Video MSTicker: We are late of 20694 miliseconds.
    
warning: Video MSTicker: We are late of 20784 miliseconds.
    
warning: Video MSTicker: We are late of 20894 miliseconds.
    
warning: Video MSTicker: We are late of 21016 miliseconds.
    
warning: echo canceller: we are accumulating too much reference signal, need to throw out 1216 samples
    
message:: audio_stream_iterate(): local statistics available
    
Local's current jitter buffer size:77.440002 ms
    
message:: bandwidth usage: audio=[d=80.1,u=80.1] video=[d=305.3,u=441.8] kbit/sec
    
message:: Thread processing load: audio=2.135499    video=1268.186768
    
warning: Video MSTicker: We are late of 21134 miliseconds.
    
warning: Video MSTicker: We are late of 21256 miliseconds.
    
warning: Video MSTicker: We are late of 21382 miliseconds.
    
warning: Video MSTicker: We are late of 21506 miliseconds.
    
warning: Video MSTicker: We are late of 21638 miliseconds.
    
warning: Video MSTicker: We are late of 21781 miliseconds.
    
warning: Video MSTicker: We are late of 21921 miliseconds.
    
message:: bandwidth usage: audio=[d=81.6,u=80.0] video=[d=271.9,u=185.5] kbit/sec
    
message:: Thread processing load: audio=1.971647    video=1342.125000
    
warning: Video MSTicker: We are late of 22068 miliseconds.
    
message:: audio_stream_iterate(): remote statistics available
    
remote's interarrival jitter=68
    
remote's lost packets percentage since last report=0.390625
    
round trip time=0.258850 seconds
    
warning: Video MSTicker: We are late of 22216 miliseconds.

    Please, help me to find the problem.

    Thanks,

    this is a msx264 git repository : git clone git://git.linphone.org/msx264.git

  • Perspective transformations

    9 juin 2010, par Mikko Koppanen — Imagick, PHP stuff

    Finally (after a long break) I managed to force myself to update the PHP documentation and this time it was distortImage code example. Things have been hectic lately but that does not quite explain the 6 months(?) break between this and the previous post. As a matter of a fact there is no excuse for such a long silence so I will try to update this blog a bit more often from now on.

    Back in the day I used to blog the examples and update the documentation if I remembered but I am trying to fix this bad habit. Most of the latest examples have been updated in to the manual. In the case of the two last examples I updated the documentation first and then blogged on the subject.

    I took some time to actually understand the perspective transformations properly using the excellent ImageMagick examples (mainly created by Anthony Thyssen) as a reference. The basic idea of perspective distortion seems simple : to distort the control points to new locations. Grabbing the syntax for Imagick was easy, an array of control point pairs in the form of :

    php

    < view plain text >

    1. array(source_x, source_y, dest_x, dest_y ... )

    The following example uses the built-in checkerboard pattern to demonstrate perspective distortion :

    php

    < view plain text >

    1. < ?php
    2. /* Create new object */
    3. $im = new Imagick() ;
    4.  
    5. /* Create new checkerboard pattern */
    6. $im->newPseudoImage(100, 100, "pattern:checkerboard") ;
    7.  
    8. /* Set the image format to png */
    9. $im->setImageFormat(’png’) ;
    10.  
    11. /* Fill background area with transparent */
    12. $im->setImageVirtualPixelMethod(Imagick: :VIRTUALPIXELMETHOD_TRANSPARENT) ;
    13.  
    14. /* Activate matte */
    15. $im->setImageMatte(true) ;
    16.  
    17. /* Control points for the distortion */
    18. $controlPoints = array( 10, 10,
    19.             10, 5,
    20.  
    21.             10, $im->getImageHeight() - 20,
    22.             10, $im->getImageHeight() - 5,
    23.  
    24.             $im->getImageWidth() - 10, 10,
    25.             $im->getImageWidth() - 10, 20,
    26.  
    27.             $im->getImageWidth() - 10, $im->getImageHeight() - 10,
    28.             $im->getImageWidth() - 10, $im->getImageHeight() - 30) ;
    29.  
    30. /* Perform the distortion */ 
    31. $im->distortImage(Imagick: :DISTORTION_PERSPECTIVE, $controlPoints, true) ;
    32.  
    33. /* Ouput the image */ 
    34. header("Content-Type : image/png") ;
    35. echo $im ;
    36.  ?>

    Here is the source image :
    checker before

    And the result :
    after

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