Recherche avancée
Médias (2)
-
GetID3 - Bloc informations de fichiers
9 avril 2013, par
Mis à jour : Mai 2013
Langue : français
Type : Image
-
GetID3 - Boutons supplémentaires
9 avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (96)
-
MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (10925)
-
How do I properly enable ffmpeg for matplotlib.animation ?
7 mars 2017, par spanishgumI have covered a lot of ground on stack so far trying to get ffmpeg going so I can make a timelapse video.
I am on a CentOS 7 machine, running
python3.7.0a0.python3
>>> import numpy as np
>>> np.__version__
'1.12.0'
>>> import matplotlib as mpl
>>> mpl.__version__
'2.0.0'
>>> import mpl_toolkits.basemap as base
>>> base.__version__
'1.0.7'I found this github gist on installing ffmpeg. I used the chromium source, and installed without a
prefixoption (using the default).I have confirmed that ffmpeg is installed, although I don’t know anything about testing whether it works.
which ffmpeg
/usr/local/bin/ffmpeg
ffmpeg -version
ffmpeg version N-83533-gada281d Copyright (c) 2000-2017 the FFmpeg dev elopers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11
configuration:
libavutil 55. 47.100 / 55. 47.100
libavcodec 57. 80.100 / 57. 80.100
libavformat 57. 66.102 / 57. 66.102
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 73.100 / 6. 73.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100I tried to run a few sample examples I found online :
[1] http://matplotlib.org/examples/animation/basic_example_writer.html
[2] http://stackoverflow.com/a/23098090/3454650
Everything works fine up until I try to save the animation file.
[1]
anim.save('basic_animation.mp4', writer = FFwriter, fps=30, extra_args=['-vcodec', 'libx264'])[2]
im_ani.save('im.mp4', writer=writer)I found here that explictly setting the path to ffmpeg might be necessary so I added this to the top of the test scripts :
plt.rcParams['animation.ffmpeg_path'] = '/usr/local/bin/ffmpeg'I tried a few more tweaks in the code but always get the same response, which I do not know how to begin deciphering :
Traceback (most recent call last):
File "testanim.py", line 27, in <module>
writer.grab_frame()
File "/usr/local/lib/python3.7/contextlib.py", line 100, in __exit__
self.gen.throw(type, value, traceback)
File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 256, in saving
self.finish()
File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 276, in finish
self.cleanup()
File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 311, in cleanup
out, err = self._proc.communicate()
File "/usr/local/lib/python3.7/subprocess.py", line 836, in communicate
stdout, stderr = self._communicate(input, endtime, timeout)
File "/usr/local/lib/python3.7/subprocess.py", line 1474, in _communicate
selector.register(self.stdout, selectors.EVENT_READ)
File "/usr/local/lib/python3.7/selectors.py", line 351, in register
key = super().register(fileobj, events, data)
File "/usr/local/lib/python3.7/selectors.py", line 237, in register
key = SelectorKey(fileobj, self._fileobj_lookup(fileobj), events, data)
File "/usr/local/lib/python3.7/selectors.py", line 224, in _fileobj_lookup
return _fileobj_to_fd(fileobj)
File "/usr/local/lib/python3.7/selectors.py", line 39, in _fileobj_to_fd
"{!r}".format(fileobj)) from None
ValueError: Invalid file object: <_io.BufferedReader name=6>
</module>Is there something with my configuration that is malformed ? I searched google for this error for some time but never found anything relevant to animations / ffmpeg. Any help would be greatly appreciated.
UPDATE :
@LordNeckBeard pointed me here : https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
I ran into problems with installing the x264 encoding dependency. Some files in libavcodec/*.c (in the
makeoutput) were reporting undefined references to several functions. After a wild goose chase found this : https://mailman.videolan.org/pipermail/x264-devel/2015-February/010971.htmlTo fix the x264 installation, I simply added some
configureflags :./configure --enable-static --enable-shared --extra-ldflags="-lswresample -llzma"
UPDATE :
So everything installed fine after fixing the libx264 problems. I went ahead and copied the ffmpeg binary from the
ffmpeg_buildfolder into/usr/local/bin/ffmpeg.After running the script I was getting problems where ffmpeg could not find the libx264 shared object. I think I will have to recompile everything using different prefixes. My intuition tells me there are old files laying around after I have messed with everything, using some configuration that is broken.
So I decided maybe I should just try to use NUX : http://linoxide.com/linux-how-to/install-ffmpeg-centos-7/
I installed ffmpeg using the new rpm, but to no avail. I still was not able to run ffmpeg because of a missing shared object.Finally, instead of usiong files copied into my
/usr/local/binfolder, I ran ffmpeg directly from the build bin directory. Turns out that this does work properly !So in essence, if I want to install ffmpeg system wide, I need to manually compile from sources again but using a nonlocal prefix.
-
Announcing Matomo 4 : More security, privacy and better performance
The moment we’ve all been waiting for is here … Matomo Analytics 4 has launched !! We’re incredibly grateful for all community members and contributors who’ve helped with improvements, and our awesome team for all the fixes.
We can’t wait for you to gain greater security, privacy protection, and be able to boost your website performance. Now who’s ready ?
Minimise your business’ web data security risk
We’ve made Matomo even more secure to meet our users’ ever increasing security needs. Matomo 4 has certainly delivered on these expectations with a wide range of security enhancements and fixes across the platform :
- Support for app specific API tokens. [#6559]
- API tokens and session ids are now stored hashed in the database which means if someone can access your database they wouldn’t be able to get the actual token.
- A more secure host validation. [#16169]
- By default, you no longer can embed widgets through tokens with higher privileges. [#16264]
- Plenty of other minor security fixes.
More protection of your customer’s personal data
Matomo 4 ensures you’re compliant with data privacy laws and provides you with more ways to keep your customer’s personal data private, such as :
- The ability to automatically anonymise the referrer to avoid tracking personal data by accident. [#15426]
- The option to enforce the disabling of cookies. [#16258]
- Possibility in JavaScript tracker to turn cookies on and off at any time. [#13056]
- The option to not store any IP address at all. [#16377]
- Easily disable visits log and visitor profile feature if needed for privacy compliance [#16259]
- New segment to separate visitors who gave consent vs visitors who didn’t give consent. [#16192]
Matomo now offers PHP 8 support to users. Want to know more ? Get a detailed list of over 300 fixes and improvements in the Matomo 4 changelog.
Increased conversion rates with a focus on page performance
Our new Page Performance feature in Matomo 4 can help you increase conversion rates by showing you exactly how fast or slow your website is going, and WHY. An Akamai Online Retail Study in 2017 found that a 100-millisecond delay in website load time could underperform website conversion rates by up to 7%.
By using this new feature you can quickly identify slow pages and fix page speed issues as soon as they arise, meaning you never miss out on those valuable new sales opportunities.
Improve your Google search rankings in 2021
According to moz.com, Google’s bringing in a new ranking factor into their algorithm named Core Web Vitals, which will place greater emphasis on load speed (favouring websites that load faster). This means the slower your page loads, the worse it will rank in Google. With Matomo’s new feature, you’ll be able to optimise your pages to rank better according to the Core Web Vitals ranking factor.
Read more on how you can use this new feature : https://matomo.org/faq/how-to/how-do-i-see-page-performance-reports/
Need help upgrading Matomo ?
Read the Updating Matomo user guide or contact the Matomo experts.
Please note : It may take a while for you to receive a notice to update to Matomo 4.
-
ffmpeg unbale to initialize threading in some cases
16 octobre 2020, par Sudipta RoyI am posting this again since the earlier question I posted has been closed


I have a JAVA service running in wildfly which is calling an external ffmpeg binary to convert .au files to .wav files. The actual command that is being executed is as follows :


ffmpeg -y -i INPUT.au OUTPUT.wav


It is running smoothly, except every once in a while it is creating an empty .wav file becasue of the following error :


Error: ffmpeg version c6710aa Copyright (c) 2000-2017 the FFmpeg 
developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --prefix=/tmp/ffmpeg-static/target --pkg-config-flags=- 
-static --extra-cflags=-I/tmp/ffmpeg-static/target/include --extra- 
ldflags=-L/tmp/ffmpeg-static/target/lib --extra-ldexeflags=-static -- 
bindir=/tmp/ffmpeg-static/bin --enable-pic --enable-ffplay --enable- 
ffserver --enable-fontconfig --enable-frei0r --enable-gpl --enable- 
version3 --enable-libass --enable-libfribidi --enable-libfdk-aac -- 
enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb -- 
enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus -- 
enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora - 
-enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis -- 
enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 -- 
enable-libxvid --enable-libzimg --enable-nonfree --enable-openssl
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100

Input #0, ogg, from 'INPUT.au'
Duration: 00:00:34.08, start: 0.01500, bitrate: 15kb/s
Stream: #0.0: Audio: speex, 8000Hz, mono, s16, 15kb/s

[AVFilterGraph @ 0x43ec6e0] Error initializing threading.
[AVFilterGraph @ 0x43ec6e0] Error creating filter 'anull'


If I try to manually convert the file from command line, it works. A brief internet search (this) shows that it might be due to the fact that
ffmpegis unable to create threads for internal use. Can anyone please elaborate ?

The server where I am facing the problem have relatively high load. I have seen that wildfly is creating close to 1800 threads.


Thanks


P.s. I have managed to recreate the problem. Below is the code :


SystemCommandExecutor.java


import java.io.*;
 import java.util.List;
 public class SystemCommandExecutor {
 private List<string> commandInformation;
 private String adminPassword;
 private ThreadedStreamHandler inputStreamHandler;
 private ThreadedStreamHandler errorStreamHandler;

 public SystemCommandExecutor(final List<string> commandInformation)
 {
 if (commandInformation==null) throw new NullPointerException("The commandInformation is required.");
 this.commandInformation = commandInformation;
 this.adminPassword = null;
 }

 public int executeCommand()
 throws IOException, InterruptedException
 {
 int exitValue = -99;

 try
 {
 ProcessBuilder pb = new ProcessBuilder(commandInformation);
 Process process = pb.start();
 OutputStream stdOutput = process.getOutputStream();
 InputStream inputStream = process.getInputStream();
 InputStream errorStream = process.getErrorStream();
 inputStreamHandler = new ThreadedStreamHandler(inputStream, stdOutput, adminPassword);
 errorStreamHandler = new ThreadedStreamHandler(errorStream);
 inputStreamHandler.start();
 errorStreamHandler.start();
 exitValue = process.waitFor();
 inputStreamHandler.interrupt();
 errorStreamHandler.interrupt();
 inputStreamHandler.join();
 errorStreamHandler.join();
 }
 catch (IOException e)
 {
 throw e;
 }
 catch (InterruptedException e)
 {
 throw e;
 }
 finally
 {
 return exitValue;
 }
 }

 public StringBuilder getStandardOutputFromCommand()
 {
 return inputStreamHandler.getOutputBuffer();
 }

 public StringBuilder getStandardErrorFromCommand()
 {
 return errorStreamHandler.getOutputBuffer();
 }
}
</string></string>

ThreadedStreamHandler.java


import java.io.*;

class ThreadedStreamHandler extends Thread
{
 InputStream inputStream;
 String adminPassword;
 OutputStream outputStream;
 PrintWriter printWriter;
 StringBuilder outputBuffer = new StringBuilder();
 private boolean sudoIsRequested = false;

 
 ThreadedStreamHandler(InputStream inputStream)
 {
 this.inputStream = inputStream;
 }

 
 ThreadedStreamHandler(InputStream inputStream, OutputStream outputStream, String adminPassword)
 {
 this.inputStream = inputStream;
 this.outputStream = outputStream;
 this.printWriter = new PrintWriter(outputStream);
 this.adminPassword = adminPassword;
 this.sudoIsRequested = true;
 }

 public void run()
 {
 
 if (sudoIsRequested)
 {
 printWriter.println(adminPassword);
 printWriter.flush();
 }

 BufferedReader bufferedReader = null;
 try
 {
 bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
 String line = null;
 while ((line = bufferedReader.readLine()) != null)
 {
 outputBuffer.append(line + "\n");
 }
 }
 catch (IOException ioe)
 {
 ioe.printStackTrace();
 }
 catch (Throwable t)
 {
 t.printStackTrace();
 }
 finally
 {
 try
 {
 bufferedReader.close();
 }
 catch (IOException e)
 {
 // ignore this one
 }
 }
 }

 private void doSleep(long millis)
 {
 try
 {
 Thread.sleep(millis);
 }
 catch (InterruptedException e)
 {
 // ignore
 }
 }

 public StringBuilder getOutputBuffer()
 {
 return outputBuffer;
 }

}


FfmpegRunnable.java


import java.io.IOException;
import java.util.List;

public class FfmpegRunnable implements Runnable {
 private List<string> command;
 SystemCommandExecutor executor;

 public FfmpegRunnable(List<string> command) {
 this.command = command;
 this.executor = new SystemCommandExecutor(command);
 }

 @Override
 public void run() {
 try {
 int id = (int) Thread.currentThread().getId();
 int result = executor.executeCommand();
 if(result != 0) {
 StringBuilder err = executor.getStandardErrorFromCommand();
 System.out.println("[" + id + "]" + "[ERROR] " + err);
 } else {
 System.out.println("[" + id + "]" + "[SUCCESS]");
 }
 } catch (IOException e) {
 e.printStackTrace();
 } catch (InterruptedException e) {
 e.printStackTrace();
 }
 }
}
</string></string>

FfmpegMain.java


import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
public class FfmpegMain {
 public static void main(String[] args) {
 //boolean threading = false;
 System.out.println(args[0]);
 int nrThread = Integer.parseInt(args[0]);
 boolean threading = Boolean.parseBoolean(args[1]);
 System.out.println("nrThread : " + nrThread + ", threading : " + threading);
 if(threading) {
 System.out.println("ffmpeg threading enabled");
 } else {
 System.out.println("ffmpeg threading not enabled");
 }
 ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(nrThread);
 for(int i=0; i cmd = new ArrayList<string>();
 String dest = "/tmp/OUTPUT/output_" + (Math.random()*1000) + ".wav";
 String cmdStr = "/tmp/FFMPEG/ffmpeg" + (threading ? " -threads 1 " : " ")
 + "-y -i /tmp/input.au " + dest;
 cmd.add("/bin/sh");
 cmd.add("-c");
 cmd.add(cmdStr);

 executor.submit(new FfmpegRunnable(cmd));
 }
 executor.shutdown();
 }
}
</string>

I have created a jar with the class files and run the jar from two seperate terminal with the following command


java -jar JAR.jar 40 true


Here 40 is the number of threads, simulating varous users accessing the system. Every once in a while I get above mentioned error.


Syndiquer tout le site
