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1,000,000
27 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Demon Seed
26 septembre 2011, par
Mis à jour : Septembre 2011
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Type : Audio
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The Four of Us are Dying
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Mis à jour : Septembre 2011
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Corona Radiata
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Mis à jour : Septembre 2011
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Head Down
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Type : Audio
Autres articles (65)
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MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
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 (...) -
Mise à jour de la version 0.1 vers 0.2
24 juin 2013, parExplications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)
Sur d’autres sites (9609)
-
Can't save matplotlib animation
19 novembre 2014, par rengerI am trying to get a simple animation saved using ffmpeg. I followed a tutorial to install ffmpeg, and I can now access it from the command prompt.
Now I run this piece of code :
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
line, = ax.plot([], [], lw=2)
def init():
line.set_data([], [])
return line,
def animate(i):
x = np.linspace(0, 2, 1000)
y = np.sin(2 * np.pi * (x - 0.01 * i))
line.set_data(x, y)
return line,
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval=20, blit=True)
mywriter = animation.FFMpegWriter()
anim.save('mymovie.mp4',writer=mywriter)
plt.show()I get this error :
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 523, in runfile
execfile(filename, namespace)
File "C:\Users\Renger\.xy\startups\b.py", line 23, in <module>
anim.save('mymovie.mp4',writer=mywriter)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 609, in save
with writer.saving(self._fig, filename, dpi):
File "C:\Python27\lib\contextlib.py", line 17, in __enter__
return self.gen.next()
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 166, in saving
self.setup(*args)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 156, in setup
self._run()
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 183, in _run
stdin=subprocess.PIPE)
File "C:\Python27\lib\subprocess.py", line 711, in __init__
errread, errwrite)
File "C:\Python27\lib\subprocess.py", line 948, in _execute_child
startupinfo)
WindowsError: [Error 2] Het systeem kan het opgegeven bestand niet vinden
</module></module></stdin>The last dutch sentence does mean something like : The system can’t find the specified file.
What do these errors mean, and how can I solve them ?
-
Can't save matplotlib animation (ffmpeg)
25 mai 2014, par rengerI am trying to get a simple animation saved using ffmpeg. I followed a tutorial to install ffmpeg, and I can now access it from the command prompt.
Now I run this piece of code :
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
line, = ax.plot([], [], lw=2)
def init():
line.set_data([], [])
return line,
def animate(i):
x = np.linspace(0, 2, 1000)
y = np.sin(2 * np.pi * (x - 0.01 * i))
line.set_data(x, y)
return line,
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval=20, blit=True)
mywriter = animation.FFMpegWriter()
anim.save('mymovie.mp4',writer=mywriter)
plt.show()I get this error :
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 523, in runfile
execfile(filename, namespace)
File "C:\Users\Renger\.xy\startups\b.py", line 23, in <module>
anim.save('mymovie.mp4',writer=mywriter)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 609, in save
with writer.saving(self._fig, filename, dpi):
File "C:\Python27\lib\contextlib.py", line 17, in __enter__
return self.gen.next()
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 166, in saving
self.setup(*args)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 156, in setup
self._run()
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 183, in _run
stdin=subprocess.PIPE)
File "C:\Python27\lib\subprocess.py", line 711, in __init__
errread, errwrite)
File "C:\Python27\lib\subprocess.py", line 948, in _execute_child
startupinfo)
WindowsError: [Error 2] Het systeem kan het opgegeven bestand niet vinden
</module></module></stdin>The last dutch sentence does mean something like : The system can’t find the specified file.
What do these errors mean, and how can I solve them ?
Best,
-
ffmpeg unbale to initialize threading [closed]
16 octobre 2020, par Sudipta RoyI 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.


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