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Médias (17)
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Matmos - Action at a Distance
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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DJ Dolores - Oslodum 2004 (includes (cc) sample of “Oslodum” by Gilberto Gil)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Danger Mouse & Jemini - What U Sittin’ On ? (starring Cee Lo and Tha Alkaholiks)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Cornelius - Wataridori 2
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Rapture - Sister Saviour (Blackstrobe Remix)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Chuck D with Fine Arts Militia - No Meaning No
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
Autres articles (91)
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Qu’est ce qu’un masque de formulaire
13 juin 2013, parUn masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
Chaque formulaire de publication d’objet peut donc être personnalisé.
Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 is the first MediaSPIP stable release.
Its official release date is June 21, 2013 and is announced here.
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 (...)
Sur d’autres sites (8219)
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ffmpeg webcam capture a/v out of sync
7 juillet 2014, par Cameron BallI’m running this command to capture video and audio from my webcam :
ffmpeg -y -f video4linux2 -s 320x240 -i /dev/video0 -f alsa -i "plughw:CARD=U0x46d0x825,DEV=0" -ac 2 -strict experimental Filename.mp4It works, but the audio is about half a second behind the video (EG if I clap, when I watch the video I’ll hear the clap and then see me do it).
This is for an online stream, so I can’t fix it up later, it needs to be recorded correctly.
It always seems to be off by the same amount, so I’m trying to find an option to simply delay when audio starts recording, but I can’t figure it out.
Any ideas ?
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How to make video from images using Java + x264 ; cross platform solution required
19 octobre 2014, par Shashank TulsyanI have made a software which records my entire day into a video.
Example video : https://www.youtube.com/watch?v=ITZYMMcubdw (Note : >16hrs compressed in 2mins, video speed too high, might cause epilepsy :P )The approach that I use right now is, Avisynth + x264 + Java.
This is very very efficient. The video for entire day is created in 3-4mins, and reduced to a size of 40-50MB. This is perfect, the only issue is that this solution is not cross platform.
Does anyone have a better idea ?I tried using java based x246 libraries but
- They are slow as hell
- The video output size is too big
- The video quality is not satisfactory.
Some website suggest a command such as :
x264.exe --crf 18 --fps 24 --input-res 1920x1080 --input-csp rgb -o "T:\crf18.mkv" "T:\___BBB\big_buck_bunny_%05d.png"There are 2 problems with this approach.
- As far as I know, x264 does accept image sequence as input, ffmpeg does
- The input images are not named in sequence such as image01.png , image02.png etc. They are named as timestamp_as_longinteger.png . So inorder to allow x264 to accept these images as input, I have to rename all of them ( i make a symbolic link for all images in a new folder ). This approach is again unsatisfactory, because I need more flexibility in selecting/unselecting files which would be converted to a video. Right now my approach is a hack.
The best solution is x264. But not sure how I can send it an image sequence from Java. That too, images which are not named in sequential fashion.
BTW The purpose of making video is going back in time, and finding out how time was spend/wasted.
The software is aware of what the user is doing. So using this I can find out (visually) how a class evolved with time. How much time I spend on a particular class/package/module/project/customer. The granuality right now is upto the class level, I wish to take it to the function level. The software is called jitendriya.
Here is 1 solution
How does one encode a series of images into H264 using the x264 C API ?But this is for C. If I have to do the same in java, and in a cross plaform fashion, I will have to resort to JNA/JNI. JNA might have a significant performance hit. JNI would be more work.
FFMpeg also looks like a nice alternative, but I am still not satisfied by any of these solutions looking at the pros and cons.
Solution Adapted.
package weeklyvideomaker;
import java.awt.AWTException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;
import neembuu.release1.util.StreamGobbler;
import org.shashaank.activitymonitor.ScreenCaptureHandler;
import org.shashaank.jitendriya.JitendriyaParams;
/**
*
* @author Shashank
*/
public class DirectVideoScreenHandler implements ScreenCaptureHandler {
private final JitendriyaParams jp;
private String extension="264";
private boolean lossless=false;
private String fps="24/1";
private Process p = null;
private Rectangle r1;
private Robot r;
private int currentDay;
private static final String[]weeks={"sun","mon","tue","wed","thu","fri","sat"};
public DirectVideoScreenHandler(JitendriyaParams jp) {
this.jp = jp;
}
public String getExtension() {
return extension;
}
public void setExtension(String extension) {
this.extension = extension;
}
public boolean isLossless() {
return lossless;
}
public void setLossless(boolean lossless) {
this.lossless = lossless;
}
public String getFps() {
return fps;
}
public void setFps(String fps) {
this.fps = fps;
}
private static int getday(){
return Calendar.getInstance().get(Calendar.DAY_OF_WEEK) - 1;
}
public void make()throws IOException,AWTException{
currentDay = getday();
File week = jp.getWeekFolder();
String destinationFile = week+"\\videos\\"+weeks[currentDay]+"_"+System.currentTimeMillis()+"_direct."+extension;
r = new Robot();
r1 = getScreenSize();
ProcessBuilder pb = makeProcess(destinationFile, 0, r1.width, r1.height);
p = pb.start();
StreamGobbler out = new StreamGobbler(p.getInputStream(), "out");
StreamGobbler err = new StreamGobbler(p.getErrorStream(), "err");
out.start();err.start();
}
private static Rectangle getScreenSize(){
return new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
}
private void screenShot(OutputStream os)throws IOException{
BufferedImage bi = r.createScreenCapture(r1);
int[]intRawData = ((java.awt.image.DataBufferInt)
bi.getRaster().getDataBuffer()).getData();
byte[]rawData = new byte[intRawData.length*3];
for (int i = 0; i < intRawData.length; i++) {
int rgb = intRawData[i];
rawData[ i*3 + 0 ] = (byte) (rgb >> 16);
rawData[ i*3 + 1 ] = (byte) (rgb >> 8);
rawData[ i*3 + 2 ] = (byte) (rgb);
}
os.write(rawData);
}
private ProcessBuilder makeProcess(String destinationFile, int numberOfFrames,
int width, int height){
LinkedList<string> commands = new LinkedList<>();
commands.add("\""+encoderPath()+"\"");
if(true){
commands.add("-");
if(lossless){
commands.add("--qp");
commands.add("0");
}
commands.add("--keyint");
commands.add("240");
commands.add("--sar");
commands.add("1:1");
commands.add("--output");
commands.add("\""+destinationFile+"\"");
if(numberOfFrames>0){
commands.add("--frames");
commands.add(String.valueOf(numberOfFrames));
}else{
commands.add("--stitchable");
}
commands.add("--fps");
commands.add(fps);
commands.add("--input-res");
commands.add(width+"x"+height);
commands.add("--input-csp");
commands.add("rgb");//i420
}
return new ProcessBuilder(commands);
}
private String encoderPath(){
return jp.getToolsPath()+File.separatorChar+"x264_64.exe";
}
@Override public void run() {
try {
if(p==null){
make();
}
if(currentDay!=getday()){// day changed
destroy();
return;
}
if(!r1.equals(getScreenSize())){// screensize changed
destroy();
return;
}
screenShot(p.getOutputStream());
} catch (Exception ex) {
Logger.getLogger(DirectVideoScreenHandler.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void destroy()throws Exception{
p.getOutputStream().flush();
p.getOutputStream().close();
p.destroy();
p = null;
}
}
</string>package weeklyvideomaker;
import org.shashaank.jitendriya.JitendriyaParams;
/**
*
* @author Shashank
*/
public class DirectVideoScreenHandlerTest {
public static void main(String[] args)throws Exception {
JitendriyaParams jp = new JitendriyaParams.Builder()
.setToolsPath("F:\\GeneralProjects\\JReminder\\development_environment\\tools")
.setOsDependentDataFolderPath("J:\\jt_data")
.build();
DirectVideoScreenHandler w = new DirectVideoScreenHandler(jp);
w.setExtension("264");
w.setFps("24/1");
w.setLossless(false);
w.make();
for (int i = 0; ; i++) {
w.run();
Thread.sleep(1000);
}
}
} -
FFMPEG Cutting Commercials puts audio out of sync
11 septembre 2014, par JaBbAUbuntu 14.04.1 with the real ffmpeg loaded (same problem with the avconv version).
I’m trying to take files created in MythTV with a HDPVR, cut the commercials and put the video into an MP4 container for use with MythRoku.
the command
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 file.mp4Works fine. Once I update the database, I can watch the file in MythRoku or Plex.
However, when I try to cut out the commercials, the audio gets out of sync by just over 1 second (audio delayed) whenever I cut past the 0 mark. Totem Video player and VLC both play the resulting video fine, but I can see a "hitch" at the beginning while they are syncing the audio, so I know the information on the audio sync is in the file somewhere. Mythroku and Plex both are out of sync when playing the file. The MythTV Frontend player actually does play it correctly, and I can hear the "hitch" as it syncs the audio.
After hours of reading posts and playing with settings, I’ve got it down to this :
If I say :
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 0 -t <anything> out.mp4</anything>The file is fine, plays both locally and in MythRoku/Plex
But if I advance the start any amount - even 1 second - audio is out of sync
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 1 -t <anything> out.mp4</anything>I’ve tried splitting the video (as mp4) and audio (as ac3) first, splitting them separately, and then putting them back together as the last step, but I get the same results.
The information is in the file - Totem, VLC and the Frontend all can figure it out. How can I get ffmpeg to figure out the sync and write the file so it’s correct ?
Original file :
mythtv@marvin:~$ mediainfo /var/lib/mythtv/recordings/2225_20140824001500.mpg
General
ID : 0 (0x0)
Complete name : /var/lib/mythtv/recordings/2225_20140824001500.mpg
Format : MPEG-TS
File size : 4.03 GiB
Duration : 1h 45mn
Overall bit rate mode : Variable
Overall bit rate : 5 491 Kbps
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : 27
Duration : 1h 45mn
Bit rate mode : Variable
Bit rate : 4 831 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.087
Stream size : 3.55 GiB (88%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 1h 45mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -6ms
Stream size : 289 MiB (7%)File cut from 0 :
mythtv@marvin:~$ mediainfo 2225_20140824001500_1.mp4
General
Complete name : 2225_20140824001500_1.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 58.5 MiB
Duration : 1mn 45s
Overall bit rate mode : Variable
Overall bit rate : 4 676 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 45s
Bit rate mode : Variable
Bit rate : 4 281 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.077
Stream size : 53.6 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1mn 45s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 4.81 MiB (8%)File cut from 1 second with audio sync problem :
mythtv@marvin:~$ mediainfo 2225_20140824001500_2.mp4
General
Complete name : 2225_20140824001500_2.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 68.0 MiB
Duration : 2mn 0s
Overall bit rate mode : Variable
Overall bit rate : 4 750 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 58s
Bit rate mode : Variable
Bit rate : 4 394 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.080
Stream size : 62.3 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 2mn 0s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 5.49 MiB (8%)
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