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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (88)
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Taille des images et des logos définissables
9 février 2011, parDans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...) -
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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Pas question de marché, de cloud etc...
10 avril 2011Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
sur le web 2.0 et dans les entreprises qui en vivent.
Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)
Sur d’autres sites (10626)
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How to create a FFMPEG VIDSTAB batch script Windows
2 octobre 2019, par esdoublelefi’m a photographer and I download photographs (.jpg) and videos (.mov) into a single Windows folder
I’m looking to create a script that will run the below 3 lines of FFMPEG for every instance of .mov in the folder and let it create stabilized .mp4 copies of the video. I’ll delete the originals manually later.
ffmpeg -i DSCF0229.MOV -vf vidstabdetect=shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=2 -y dummy.mp4
ffmpeg -i DSCF0229.MOV -vf scale=trunc((iw*1.15)/2)*2:trunc(ow/a/2)*2 -y scaled.mp4
ffmpeg -i scaled.mp4 -vf vidstabtransform=smoothing=30:input="transforms.trf":interpol=linear:crop=black:zoom=0:optzoom=1,unsharp=5:5:0.8:3:3:0.4 -y DSCF0229stabilized.mp4i can tweak a bit of code, but i’m clueless on where to start. i tried "for do" and even a batch.bat file, but i just can’t get the proper syntax right.
really appreciate any help here !!
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Manage multipe IP cameras at the same time
4 juin 2015, par AlessioHow I can manage multiple GoPro cameras at the same time ? I want to stream three videos of three GoPro cameras at the same time and record the videos on the hard disk.
I have written a tool in Java for one GoPro and it works correctly.
Help me please !
This is the code :
public class GoProStreamer extends JFrame {
private static final String CAMERA_IP = "10.5.5.9";
private static int PORT = 8080;
private static DatagramSocket mOutgoingUdpSocket;
private Process streamingProcess;
private Process writeVideoProcess;
private KeepAliveThread mKeepAliveThread;
private JPanel contentPane;
public GoProStreamer() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(800, 10, 525, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JButton btnStop = new JButton("Stop stream");
JButton btnStart = new JButton("Start stream");
JButton btnRec = new JButton("Rec");
JButton btnStopRec = new JButton("Stop Rec");
// JButton btnZoomIn = new JButton("Zoom In sincrono");
// JButton btnZoomOut = new JButton("Zoom out sincrono");
// JButton btnZoomIn1 = new JButton("Zoom In Camera 1");
// JButton btnZoomOut1 = new JButton("Zoom out Camera 1");
// JButton btnZoomIn2 = new JButton("Zoom in Camera 2");
// JButton btnZoomOut2 = new JButton("Zoom out Camera 2");
// JButton btnZoomIn3 = new JButton("Zoom in camera 3");
// JButton btnZoomOut3 = new JButton("Zoom out Camera 3");
btnStop.setEnabled(false);
btnRec.setEnabled(false);
btnStopRec.setEnabled(false);
// btnZoomIn.setEnabled(false);
// btnZoomOut.setEnabled(false);
// btnZoomIn1.setEnabled(false);
// btnZoomOut1.setEnabled(false);
// btnZoomIn2.setEnabled(false);
// btnZoomOut2.setEnabled(false);
// btnZoomIn3.setEnabled(false);
// btnZoomOut3.setEnabled(false);
JPanel panel = new JPanel();
// JPanel panel2 = new JPanel();
// JPanel panel3 = new JPanel();
// JPanel panel4 = new JPanel();
panel.add(btnStart);
panel.add(btnStop);
panel.add(btnRec);
panel.add(btnStopRec);
// panel2.add(btnZoomIn1);
// panel3.add(btnZoomOut1);
// panel2.add(btnZoomIn2);
// panel3.add(btnZoomOut2);
// panel2.add(btnZoomIn3);
// panel3.add(btnZoomOut3);
// panel4.add(btnZoomIn);
// panel4.add(btnZoomOut);
contentPane.add(panel, BorderLayout.SOUTH);
// contentPane.add(panel2, BorderLayout.NORTH);
// contentPane.add(panel3, BorderLayout.CENTER);
btnStart.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
startStreamService();
keepAlive();
startStreaming();
btnStart.setEnabled(false);
btnStop.setEnabled(true);
btnRec.setEnabled(true);
btnStopRec.setEnabled(false);
// btnZoomIn.setEnabled(true);
// btnZoomOut.setEnabled(true);
// btnZoomIn1.setEnabled(true);
// btnZoomOut1.setEnabled(true);
// btnZoomIn2.setEnabled(true);
// btnZoomOut2.setEnabled(true);
// btnZoomIn3.setEnabled(true);
// btnZoomOut3.setEnabled(true);
}
});
btnStop.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
stopStreaming();
stopKeepalive();
btnStart.setEnabled(true);
btnStop.setEnabled(false);
btnRec.setEnabled(false);
btnStopRec.setEnabled(false);
}
});
btnRec.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
startRec();
btnStart.setEnabled(false);
btnStop.setEnabled(false);
btnRec.setEnabled(false);
btnStopRec.setEnabled(true);
}
});
btnStopRec.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
stopRec();
btnStart.setEnabled(false);
btnStop.setEnabled(true);
btnRec.setEnabled(true);
btnStopRec.setEnabled(false);
}
});
}
private void startStreamService() {
HttpURLConnection localConnection = null;
try {
String str = "http://" + CAMERA_IP + "/gp/gpExec?p1=gpStreamA9&c1=restart";
localConnection = (HttpURLConnection) new URL(str).openConnection();
localConnection.addRequestProperty("Cache-Control", "no-cache");
localConnection.setConnectTimeout(5000);
localConnection.setReadTimeout(5000);
int i = localConnection.getResponseCode();
if (i >= 400) {
throw new IOException("sendGET HTTP error " + i);
}
}
catch (Exception e) {
}
if (localConnection != null) {
localConnection.disconnect();
}
}
@SuppressWarnings("static-access")
private void sendUdpCommand(int paramInt) throws SocketException, IOException {
Locale localLocale = Locale.US;
Object[] arrayOfObject = new Object[4];
arrayOfObject[0] = Integer.valueOf(0);
arrayOfObject[1] = Integer.valueOf(0);
arrayOfObject[2] = Integer.valueOf(paramInt);
arrayOfObject[3] = Double.valueOf(0.0D);
byte[] arrayOfByte = String.format(localLocale, "_GPHD_:%d:%d:%d:%1f\n", arrayOfObject).getBytes();
String str = CAMERA_IP;
int i = PORT;
DatagramPacket localDatagramPacket = new DatagramPacket(arrayOfByte, arrayOfByte.length, new InetSocketAddress(str, i));
this.mOutgoingUdpSocket.send(localDatagramPacket);
}
private void startStreaming() {
Thread threadStream = new Thread() {
@Override
public void run() {
try {
streamingProcess = Runtime.getRuntime().exec("ffmpeg-20150318-git-0f16dfd-win64-static\\bin\\ffplay -i http://10.5.5.9:8080/live/amba.m3u8");
InputStream errorStream = streamingProcess.getErrorStream();
byte[] data = new byte[1024];
int length = 0;
while ((length = errorStream.read(data, 0, data.length)) > 0) {
System.out.println(new String(data, 0, length));
System.out.println(System.currentTimeMillis());
}
} catch (IOException e) {
}
}
};
threadStream.start();
}
private void startRec() {
Thread threadRec = new Thread() {
@Override
public void run() {
try {
writeVideoProcess = Runtime.getRuntime().exec("ffmpeg-20150318-git-0f16dfd-win64-static\\bin\\ffmpeg -re -i http://10.5.5.9:8080/live/amba.m3u8 -c copy -an Video_GoPro_" + Math.random() + ".avi");
InputStream errorRec = writeVideoProcess.getErrorStream();
byte[] dataRec = new byte[1024];
int lengthRec = 0;
while ((lengthRec = errorRec.read(dataRec, 0, dataRec.length)) > 0) {
System.out.println(new String(dataRec, 0, lengthRec));
System.out.println(System.currentTimeMillis());
}
} catch (IOException e) {
}
}
};
threadRec.start();
}
private void keepAlive() {
mKeepAliveThread = new KeepAliveThread();
mKeepAliveThread.start();
}
class KeepAliveThread extends Thread {
public void run() {
try {
Thread.currentThread().setName("gopro");
if (mOutgoingUdpSocket == null) {
mOutgoingUdpSocket = new DatagramSocket();
}
while ((!Thread.currentThread().isInterrupted()) && (mOutgoingUdpSocket != null)) {
sendUdpCommand(2);
Thread.sleep(2500L);
}
}
catch (SocketException e) {
}
catch (InterruptedException e) {
}
catch (Exception e) {
}
}
}
private void stopStreaming() {
if (streamingProcess != null) {
streamingProcess.destroy();
streamingProcess = null;
}
stopKeepalive();
mOutgoingUdpSocket.disconnect();
mOutgoingUdpSocket.close();
}
private void stopRec() {
writeVideoProcess.destroy();
writeVideoProcess = null;
}
private void stopKeepalive() {
if (mKeepAliveThread != null) {
mKeepAliveThread.interrupt();
try {
mKeepAliveThread.join(10L);
mKeepAliveThread = null;
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
public static void main(String[] args) {
GoProStreamer streamer = new GoProStreamer();
streamer.setVisible(true);
streamer.setTitle("Pannello di controllo");
}}
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ffmpeg : combining/ordering vidstab and crop filters
30 juillet 2016, par ljwobkerI have a workflow which essentially takes a raw video file, crops away portions of the frame that aren’t relevant, then performs a two-pass deshake filter using the vidstab filter. At the moment I’m running this as three distinct commands : one to do the crop, a second to do the vidstab "detect" pass, and a third to do the vidstab "transform" pass.
My working script :
# do the crop first and strip the audio
nice -20 ffmpeg -hide_banner -ss $SEEK -i $INFILE -t $DURATION -preset veryfast -crf 12 -vf crop=0.60*in_w:in_h/9*8:0.22*in_w:0 -an -y $TEMP
# now run the vidstab detection pass
nice -20 ffmpeg -hide_banner -i $TEMP -vf vidstabdetect=stepsize=6:shakiness=10:accuracy=15:result=${INFILE}.trf -f null -
# now the vidstab transform, with unsharp and writing the overlay text
nice -20 ffmpeg -hide_banner -i $TEMP -preset veryfast -crf 22 -vf \
" \
vidstabtransform=input=${INFILE}.trf:zoom=2:smoothing=60,
unsharp=5:5:0.8:3:3:0.4,
drawtext=fontfile=/Windows/Fonts/arialbd.ttf:text=$DIVE:enable='between(t,0,65)':fontcolor=black:fontsize=72:x=w*0.01:y=h*0.01,
null"\
-y $OUTFILEWhat I can’t seem to figure out is how I can combine the first two filter passes into a single chain, which (at least in theory) would be a faster encode time, and at the very least would be simpler to maintain and would eliminate a pass of the encoder. What I tried to do was the second code block, which just builds a filterchain that combines the initial crop with the vidstab detection filter.
# this is a combined filter for the crop and the vidstab detect
nice -20 ffmpeg -hide_banner -ss $SEEK -i $INFILE -t $DURATION -preset veryfast -crf 12 -vf \
" \
crop=0.60*in_w:in_h/9*8:0.22*in_w:0,
vidstabdetect=stepsize=6:shakiness=10:accuracy=15:result=${INFILE}.trf,
null " \
-an -r 30 -y $TEMP
# now run the transcoding and the vidstab transform
nice -20 ffmpeg -hide_banner -i $TEMP -preset veryfast -crf 22 -vf \
" \
vidstabtransform=input=${INFILE}.trf:zoom=2:smoothing=60,
unsharp=5:5:0.8:3:3:0.4,
drawtext=fontfile=/Windows/Fonts/arialbd.ttf:text=$DIVE:enable='between(t,0,65)':fontcolor=black:fontsize=72:x=w*0.01:y=h*0.01,
null"\
-y $OUTFILEHowever, when I run this (and it runs) the final output video has most definitely NOT been effectively stabilized. The logs show that both the detect and the transform passes have been processed, it’s just that the output isn’t right.
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