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Autres articles (62)
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Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Keeping control of your media in your hands
13 avril 2011, parThe 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 (...)
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Jitsi and ffplay
15 juin 2014, par KotkotI’m playing with jitsi. Got examples form source code. I modified it a bit.
Here is what I’ve got.
I am trying to play the transmitted stream in VLC of ffplay or any other player,
but I cannot.I use these application parameters to run the code :
--local-port-base=5000 --remote-host=localhost --remote-port-base=10000What am I doing wrong ?
package com.company;
/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
import org.jitsi.service.libjitsi.LibJitsi;
import org.jitsi.service.neomedia.*;
import org.jitsi.service.neomedia.device.MediaDevice;
import org.jitsi.service.neomedia.format.MediaFormat;
import org.jitsi.service.neomedia.format.MediaFormatFactory;
import java.io.PrintStream;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.HashMap;
import java.util.Map;
/**
* Implements an example application in the fashion of JMF's AVTransmit2 example
* which demonstrates the use of the <tt>libjitsi</tt> library for the purposes
* of transmitting audio and video via RTP means.
*
* @author Lyubomir Marinov
*/
public class VideoTransmitter {
/**
* The port which is the source of the transmission i.e. from which the
* media is to be transmitted.
*
* @see #LOCAL_PORT_BASE_ARG_NAME
*/
private int localPortBase;
/**
* The <tt>MediaStream</tt> instances initialized by this instance indexed
* by their respective <tt>MediaType</tt> ordinal.
*/
private MediaStream[] mediaStreams;
/**
* The <tt>InetAddress</tt> of the host which is the target of the
* transmission i.e. to which the media is to be transmitted.
*
* @see #REMOTE_HOST_ARG_NAME
*/
private InetAddress remoteAddr;
/**
* The port which is the target of the transmission i.e. to which the media
* is to be transmitted.
*
* @see #REMOTE_PORT_BASE_ARG_NAME
*/
private int remotePortBase;
/**
* Initializes a new <tt>AVTransmit2</tt> instance which is to transmit
* audio and video to a specific host and a specific port.
*
* @param localPortBase the port which is the source of the transmission
* i.e. from which the media is to be transmitted
* @param remoteHost the name of the host which is the target of the
* transmission i.e. to which the media is to be transmitted
* @param remotePortBase the port which is the target of the transmission
* i.e. to which the media is to be transmitted
* @throws Exception if any error arises during the parsing of the specified
* <tt>localPortBase</tt>, <tt>remoteHost</tt> and <tt>remotePortBase</tt>
*/
private VideoTransmitter(
String localPortBase,
String remoteHost, String remotePortBase)
throws Exception {
this.localPortBase
= (localPortBase == null)
? -1
: Integer.valueOf(localPortBase).intValue();
this.remoteAddr = InetAddress.getByName(remoteHost);
this.remotePortBase = Integer.valueOf(remotePortBase).intValue();
}
/**
* Starts the transmission. Returns null if transmission started ok.
* Otherwise it returns a string with the reason why the setup failed.
*/
private String start()
throws Exception {
/*
* Prepare for the start of the transmission i.e. initialize the
* MediaStream instances.
*/
MediaType[] mediaTypes = MediaType.values();
MediaService mediaService = LibJitsi.getMediaService();
int localPort = localPortBase;
int remotePort = remotePortBase;
mediaStreams = new MediaStream[mediaTypes.length];
for (MediaType mediaType : mediaTypes) {
if(mediaType != MediaType.VIDEO) continue;
/*
* The default MediaDevice (for a specific MediaType) is configured
* (by the user of the application via some sort of UI) into the
* ConfigurationService. If there is no ConfigurationService
* instance known to LibJitsi, the first available MediaDevice of
* the specified MediaType will be chosen by MediaService.
*/
MediaDevice device
= mediaService.getMediaDeviceForPartialDesktopStreaming(100,100,100,100);
if (device == null) {
continue;
}
MediaStream mediaStream = mediaService.createMediaStream(device);
// direction
/*
* The AVTransmit2 example sends only and the AVReceive2 receives
* only. In a call, the MediaStream's direction will most commonly
* be set to SENDRECV.
*/
mediaStream.setDirection(MediaDirection.SENDONLY);
// format
String encoding;
double clockRate;
/*
* The AVTransmit2 and AVReceive2 examples use the H.264 video
* codec. Its RTP transmission has no static RTP payload type number
* assigned.
*/
byte dynamicRTPPayloadType;
switch (device.getMediaType()) {
case AUDIO:
encoding = "PCMU";
clockRate = 8000;
/* PCMU has a static RTP payload type number assigned. */
dynamicRTPPayloadType = -1;
break;
case VIDEO:
encoding = "H264";
clockRate = MediaFormatFactory.CLOCK_RATE_NOT_SPECIFIED;
/*
* The dymanic RTP payload type numbers are usually negotiated
* in the signaling functionality.
*/
dynamicRTPPayloadType = 99;
break;
default:
encoding = null;
clockRate = MediaFormatFactory.CLOCK_RATE_NOT_SPECIFIED;
dynamicRTPPayloadType = -1;
}
if (encoding != null) {
MediaFormat format
= mediaService.getFormatFactory().createMediaFormat(
encoding,
clockRate);
/*
* The MediaFormat instances which do not have a static RTP
* payload type number association must be explicitly assigned
* a dynamic RTP payload type number.
*/
if (dynamicRTPPayloadType != -1) {
mediaStream.addDynamicRTPPayloadType(
dynamicRTPPayloadType,
format);
}
mediaStream.setFormat(format);
}
// connector
StreamConnector connector;
if (localPortBase == -1) {
connector = new DefaultStreamConnector();
} else {
int localRTPPort = localPort++;
int localRTCPPort = localPort++;
connector
= new DefaultStreamConnector(
new DatagramSocket(localRTPPort),
new DatagramSocket(localRTCPPort));
}
mediaStream.setConnector(connector);
// target
/*
* The AVTransmit2 and AVReceive2 examples follow the common
* practice that the RTCP port is right after the RTP port.
*/
int remoteRTPPort = remotePort++;
int remoteRTCPPort = remotePort++;
mediaStream.setTarget(
new MediaStreamTarget(
new InetSocketAddress(remoteAddr, remoteRTPPort),
new InetSocketAddress(remoteAddr, remoteRTCPPort)));
// name
/*
* The name is completely optional and it is not being used by the
* MediaStream implementation at this time, it is just remembered so
* that it can be retrieved via MediaStream#getName(). It may be
* integrated with the signaling functionality if necessary.
*/
mediaStream.setName(mediaType.toString());
mediaStreams[mediaType.ordinal()] = mediaStream;
}
/*
* Do start the transmission i.e. start the initialized MediaStream
* instances.
*/
for (MediaStream mediaStream : mediaStreams) {
if (mediaStream != null) {
mediaStream.start();
}
}
return null;
}
/**
* Stops the transmission if already started
*/
private void stop() {
if (mediaStreams != null) {
for (int i = 0; i < mediaStreams.length; i++) {
MediaStream mediaStream = mediaStreams[i];
if (mediaStream != null) {
try {
mediaStream.stop();
} finally {
mediaStream.close();
mediaStreams[i] = null;
}
}
}
mediaStreams = null;
}
}
/**
* The name of the command-line argument which specifies the port from which
* the media is to be transmitted. The command-line argument value will be
* used as the port to transmit the audio RTP from, the next port after it
* will be to transmit the audio RTCP from. Respectively, the subsequent
* ports will be used to transmit the video RTP and RTCP from."
*/
private static final String LOCAL_PORT_BASE_ARG_NAME
= "--local-port-base=";
/**
* The name of the command-line argument which specifies the name of the
* host to which the media is to be transmitted.
*/
private static final String REMOTE_HOST_ARG_NAME = "--remote-host=";
/**
* The name of the command-line argument which specifies the port to which
* the media is to be transmitted. The command-line argument value will be
* used as the port to transmit the audio RTP to, the next port after it
* will be to transmit the audio RTCP to. Respectively, the subsequent ports
* will be used to transmit the video RTP and RTCP to."
*/
private static final String REMOTE_PORT_BASE_ARG_NAME
= "--remote-port-base=";
/**
* The list of command-line arguments accepted as valid by the
* <tt>AVTransmit2</tt> application along with their human-readable usage
* descriptions.
*/
private static final String[][] ARGS
= {
{
LOCAL_PORT_BASE_ARG_NAME,
"The port which is the source of the transmission i.e. from"
+ " which the media is to be transmitted. The specified"
+ " value will be used as the port to transmit the audio"
+ " RTP from, the next port after it will be used to"
+ " transmit the audio RTCP from. Respectively, the"
+ " subsequent ports will be used to transmit the video RTP"
+ " and RTCP from."
},
{
REMOTE_HOST_ARG_NAME,
"The name of the host which is the target of the transmission"
+ " i.e. to which the media is to be transmitted"
},
{
REMOTE_PORT_BASE_ARG_NAME,
"The port which is the target of the transmission i.e. to which"
+ " the media is to be transmitted. The specified value"
+ " will be used as the port to transmit the audio RTP to"
+ " the next port after it will be used to transmit the"
+ " audio RTCP to. Respectively, the subsequent ports will"
+ " be used to transmit the video RTP and RTCP to."
}
};
public static void main(String[] args)
throws Exception {
// We need two parameters to do the transmission. For example,
// ant run-example -Drun.example.name=AVTransmit2 -Drun.example.arg.line="--remote-host=127.0.0.1 --remote-port-base=10000"
if (args.length < 2) {
prUsage();
} else {
Map argMap = parseCommandLineArgs(args);
LibJitsi.start();
try {
// Create a audio transmit object with the specified params.
VideoTransmitter at
= new VideoTransmitter(
argMap.get(LOCAL_PORT_BASE_ARG_NAME),
argMap.get(REMOTE_HOST_ARG_NAME),
argMap.get(REMOTE_PORT_BASE_ARG_NAME));
// Start the transmission
String result = at.start();
// result will be non-null if there was an error. The return
// value is a String describing the possible error. Print it.
if (result == null) {
System.err.println("Start transmission for 600 seconds...");
// Transmit for 60 seconds and then close the processor
// This is a safeguard when using a capture data source
// so that the capture device will be properly released
// before quitting.
// The right thing to do would be to have a GUI with a
// "Stop" button that would call stop on AVTransmit2
try {
Thread.sleep(600_000);
} catch (InterruptedException ie) {
}
// Stop the transmission
at.stop();
System.err.println("...transmission ended.");
} else {
System.err.println("Error : " + result);
}
} finally {
LibJitsi.stop();
}
}
}
/**
* Parses the arguments specified to the <tt>AVTransmit2</tt> application on
* the command line.
*
* @param args the arguments specified to the <tt>AVTransmit2</tt>
* application on the command line
* @return a <tt>Map</tt> containing the arguments specified to the
* <tt>AVTransmit2</tt> application on the command line in the form of
* name-value associations
*/
static Map parseCommandLineArgs(String[] args) {
Map argMap = new HashMap();
for (String arg : args) {
int keyEndIndex = arg.indexOf('=');
String key;
String value;
if (keyEndIndex == -1) {
key = arg;
value = null;
} else {
key = arg.substring(0, keyEndIndex + 1);
value = arg.substring(keyEndIndex + 1);
}
argMap.put(key, value);
}
return argMap;
}
/**
* Outputs human-readable description about the usage of the
* <tt>AVTransmit2</tt> application and the command-line arguments it
* accepts as valid.
*/
private static void prUsage() {
PrintStream err = System.err;
err.println("Usage: " + VideoTransmitter.class.getName() + " <args>");
err.println("Valid args:");
for (String[] arg : ARGS)
err.println(" " + arg[0] + " " + arg[1]);
}
}
</args> -
ffmpeg overlay picture not every frame
14 juillet 2016, par ssiditTo overlay picture on video I use next command
ffmpeg -i video.mp4 -i pic.png -strict -2 -filter_complex 'overlay=10:main_h-overlay_h-10' result.mp4But as I can see it takes quite a lot of time to process even small HD video. I want overlay image on my android device, so I need some performance hacks.
Are there any commands to overlay image on each 10’s frame, which is suitable for human eye ?
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Help us Reset The Net today on June 5th
This blog post explains why the Piwik project is joining ResetTheNet online protest and how you can help make a difference against mass surveillance. It also includes an infographic and links to useful resources which may be of interest to you.
Snowden revelations, a year ago today
On June 5, 2013 the Guardian newspaper published the first of Edward Snowden’s astounding revelations. It was the first of a continuous stream of stories that pointed out what we’ve suspected for a long time : that the world’s digital communications are being continuously spied upon by nation states with precious little oversight.
Unfortunately, mass surveillance is affecting the internet heavily. The Internet is a powerful force that can promote democracy, innovation, and creativity, but it’s being subverted as a tool for government spying. That is why Piwik has decided to join Reset The Net.
June 5, 2014 marks a new year : a year that will not just be about listening to the inside story of mass surveillance, but a new year of fighting back !
How do I protect myself and others ?
Reset the Net is asking everyone to help by installing free software tools that are designed to protect your privacy on a computer or a mobile device.
Reset the Net is also calling on websites and developers to add surveillance resistant features such as HTTPS and forward secrecy.
Participate in ResetTheNet online protest
Have you got your own website, blog or tumblr ? Maybe you can show the Internet Defense League’s “Cat Signal !” on your website.Get the code now to run the Reset the Net splash screen or banner to help make privacy viral on June 5th.
Message from Edward Snowden
Evan from FFTF sent us this message from Edward Snowden and we thought we would share it with you :
One year ago, we learned that the internet is under surveillance, and our activities are being monitored to create permanent records of our private lives — no matter how innocent or ordinary those lives might be.
Today, we can begin the work of effectively shutting down the collection of our online communications, even if the US Congress fails to do the same. That’s why I’m asking you to join me on June 5th for Reset the Net, when people and companies all over the world will come together to implement the technological solutions that can put an end to the mass surveillance programs of any government. This is the beginning of a moment where we the people begin to protect our universal human rights with the laws of nature rather than the laws of nations.
We have the technology, and adopting encryption is the first effective step that everyone can take to end mass surveillance. That’s why I am excited for Reset the Net — it will mark the moment when we turn political expression into practical action, and protect ourselves on a large scale.
Join us on June 5th, and don’t ask for your privacy. Take it back.
– Message by Edward Snowden
ResetTheNet privacy pack infographic
Additional Resources
Configure Piwik for Security and Privacy
- Turn on automatic SSL redirection in your Piwik.
- Configure Piwik for advanced Privacy.
- Best security practises for Piwik.
More info
- Learn why this matters (EFF)
- Data Privacy Day – Why is privacy important ? (Piwik)
- Web Analytics Privacy (Piwik)
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