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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • 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 (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

Sur d’autres sites (5825)

  • Overcome MPEG 2 TS Link Buildup Latency

    18 février 2015, par user2389323

    I have built a TS audio video link. I send encoded raw audio and video from one computer to another using TS over Ethernet. I am using FFMPEG libraries for this. Everything works fine except there is a latency build up with time.

    When i play the raw video content at both encode and decoder ends, initially there is very little visible latency(less than a second). But when time increases the difference of the two videos slowly increase. I am playing the received video using a fixed frame rate.

    As i have understood it is possible to us the PCR value to overcome this latency build up problem but it is not clear to me how to use that value..

    Can someone kindly tell me how to use the PCR value of a TS stream to avoid latency build up ?

    Thank you.

  • Problems with point to point streaming using FFmpeg

    16 février 2015, par UserOfStackoverflow

    I want to live stream video from webcam and sound from microphone from one computer to another but there is some problems.

    When I use this command line :

    ffmpeg.exe -f dshow -rtbufsize 500M -i video="Camera":audio="Microphone" -c:v mpeg4 -c:a mp2 -f mpegts udp://127.0.0.1:1234

    FFmpeg console starts filling with yellow color messages and stream becomes unstable : http://s16.postimg.org/qglcgr345/Untitled.png

    To solve this problem I have added new parameter to the command line to set the frame rate -r 25 :

    ffmpeg.exe -f dshow -rtbufsize 500M -r 25 -i video="Camera":audio="Microphone" -c:v mpeg4 -c:a mp2 -f mpegts udp://127.0.0.1:1234

    After I added -r 25 problem with yellow color messages disappears but then appears another problem. When I fresh start FFmpeg with this command line video and sound looks synchronous but after one or two minutes appears 25 seconds lag between video and sound, sound goes behind video. I have tried that with different protocols UDP, TCP, RTP but problems are the same. Please help me !

  • Read h.264 video frames with opencv in python Enthough (mac Yosemite)

    3 février 2015, par Bertrand

    I’m using the Enthought distribution (Canopy) to do some data analysis and computer vision in the IPython notebook. I want to read the frames of several .avi files that use the h.264 codec and make some annotations on those images.

    if you’re using the Canopy distribution, you know that you can install opencv through the package manager (just launch the Canopy application, click on package manager, search for opencv and install the package). The issue though is that the following code

    import cv2
    
f = "/Volumes/DATA/temp.avi"
    
cap = cv2.VideoCapture(f)
    

    
flag,frame = cap.read()
    

    
print flag,frame

    always returns (None,None) because opencv can’t read the video. So it seems like ffmpeg is not enabled by default in the Enthought package manager.

    I’ve been losing a lot of time on this problem, so I’ll post the solution below. Hopefully it will help some other folks out there !

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