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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (109)
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L’utiliser, en parler, le critiquer
10 avril 2011La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
Une liste de discussion est disponible pour tout échange entre utilisateurs. -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
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Sur d’autres sites (9275)
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Android studio + OpenCV + FFmpeg
26 février 2016, par t0mI have problem with code, which is functional only for Genymotion device (Android 4.1.1), but for Genymotion device 5.0.1 and real device Huawei honor 4c Android 4.4.2 not.
I have imported OpenCV 3.1 to Android studio by : http://stackoverflow.com/a/27421494/4244605
I added JavaCV with FFmpeg by : https://github.com/bytedeco/javacvAndroid studio 1.5.1
minSdkVersion 15
compileSdkVersion 23Code is only for test.
OpenCVCameraActivity.java :package co.timeiseverything.pstimeiseverything;
import android.app.Activity;
import android.hardware.Camera;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.SubMenu;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.Toast;
import org.bytedeco.javacv.FFmpegFrameRecorder;
import org.bytedeco.javacv.Frame;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Mat;
import java.io.File;
import java.nio.ShortBuffer;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.ListIterator;
@SuppressWarnings("ALL")
public class OpenCVCameraActivity extends Activity implements
CameraBridgeViewBase.CvCameraViewListener2,
View.OnTouchListener {
//name of activity, for DEBUGGING
private static final String TAG = OpenCVCameraActivity.class.getSimpleName();
private OpenCVCameraPreview mOpenCvCameraView;
private List mResolutionList;
private MenuItem[] mEffectMenuItems;
private SubMenu mColorEffectsMenu;
private MenuItem[] mResolutionMenuItems;
private SubMenu mResolutionMenu;
private static long frameCounter = 0;
long startTime = 0;
private Mat edgesMat;
boolean recording = false;
private int sampleAudioRateInHz = 44100;
private int imageWidth = 1920;
private int imageHeight = 1080;
private int frameRate = 30;
private Frame yuvImage = null;
private File ffmpeg_link;
private FFmpegFrameRecorder recorder;
/* audio data getting thread */
private AudioRecord audioRecord;
private AudioRecordRunnable audioRecordRunnable;
private Thread audioThread;
volatile boolean runAudioThread = true;
ShortBuffer[] samples;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
mOpenCvCameraView.setOnTouchListener(OpenCVCameraActivity.this);
break;
default:
super.onManagerConnected(status);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(Static.DEBUG) Log.i(TAG, "onCreate()");
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
try {
setContentView(R.layout.activity_opencv);
mOpenCvCameraView = (OpenCVCameraPreview) findViewById(R.id.openCVCameraPreview);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
//mOpenCvCameraView.enableFpsMeter();
ffmpeg_link = new File(Environment.getExternalStorageDirectory(), "stream.mp4");
} catch (Exception e){
e.printStackTrace();
}
}
@Override
protected void onRestart() {
if (Static.DEBUG) Log.i(TAG, "onRestart()");
super.onRestart();
}
@Override
protected void onStart() {
if (Static.DEBUG) Log.i(TAG, "onStart()");
super.onStart();
}
@Override
protected void onResume() {
if (Static.DEBUG) Log.i(TAG, "onResume()");
super.onResume();
if (!OpenCVLoader.initDebug()) {
Log.i(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_11, this, mLoaderCallback);
} else {
Log.i(TAG, "OpenCV library found inside package. Using it!");
mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (Static.DEBUG) Log.i(TAG, "onCreateOptionsMenu()");
super.onCreateOptionsMenu(menu);
List<string> effects = mOpenCvCameraView.getEffectList();
if (effects == null) {
Log.e(TAG, "Color effects are not supported by device!");
return true;
}
mColorEffectsMenu = menu.addSubMenu("Color Effect");
mEffectMenuItems = new MenuItem[effects.size()];
int idx = 0;
ListIterator<string> effectItr = effects.listIterator();
while(effectItr.hasNext()) {
String element = effectItr.next();
mEffectMenuItems[idx] = mColorEffectsMenu.add(1, idx, Menu.NONE, element);
idx++;
}
mResolutionMenu = menu.addSubMenu("Resolution");
mResolutionList = mOpenCvCameraView.getResolutionList();
mResolutionMenuItems = new MenuItem[mResolutionList.size()];
ListIterator resolutionItr = mResolutionList.listIterator();
idx = 0;
while(resolutionItr.hasNext()) {
Camera.Size element = resolutionItr.next();
mResolutionMenuItems[idx] = mResolutionMenu.add(2, idx, Menu.NONE,
Integer.valueOf(element.width).toString() + "x" + Integer.valueOf(element.height).toString());
idx++;
}
return true;
}
@Override
protected void onPause() {
if (Static.DEBUG) Log.i(TAG, "onPause()");
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
protected void onStop() {
if (Static.DEBUG) Log.i(TAG, "onStop()");
super.onStop();
}
@Override
protected void onDestroy() {
if (Static.DEBUG) Log.i(TAG, "onDestroy()");
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
++frameCounter;
//Log.i(TAG, "Frame number: "+frameCounter);
return inputFrame.rgba();
}
@Override
public void onCameraViewStarted(int width, int height) {
edgesMat = new Mat();
}
@Override
public void onCameraViewStopped() {
if (edgesMat != null)
edgesMat.release();
edgesMat = null;
}
public boolean onOptionsItemSelected(MenuItem item) {
Log.i(TAG, "called onOptionsItemSelected; selected item: " + item);
if (item.getGroupId() == 1)
{
mOpenCvCameraView.setEffect((String) item.getTitle());
Toast.makeText(this, mOpenCvCameraView.getEffect(), Toast.LENGTH_SHORT).show();
} else if (item.getGroupId() == 2) {
int id = item.getItemId();
Camera.Size resolution = mResolutionList.get(id);
mOpenCvCameraView.setResolution(resolution);
resolution = mOpenCvCameraView.getResolution();
String caption = Integer.valueOf(resolution.width).toString() + "x" + Integer.valueOf(resolution.height).toString();
Toast.makeText(this, caption, Toast.LENGTH_SHORT).show();
}
return true;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.i(TAG,"onTouch event");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
String currentDateandTime = sdf.format(new Date());
String fileName = Environment.getExternalStorageDirectory().getPath() +
"/sample_picture_" + currentDateandTime + ".jpg";
mOpenCvCameraView.takePicture(fileName);
Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
return false;
}
/**
* Click to ImageButton to start recording.
*/
public void onClickBtnStartRecord2(View v) {
if (Static.DEBUG) Log.i(TAG, "onClickBtnStartRecord()");
if(!recording)
startRecording();
else
stopRecording();
}
private void startRecording() {
if (Static.DEBUG) Log.i(TAG, "startRecording()");
initRecorder();
try {
recorder.start();
startTime = System.currentTimeMillis();
recording = true;
audioThread.start();
} catch(FFmpegFrameRecorder.Exception e) {
e.printStackTrace();
}
}
private void stopRecording() {
if (Static.DEBUG) Log.i(TAG, "stopRecording()");
runAudioThread = false;
try {
audioThread.join();
} catch(InterruptedException e) {
e.printStackTrace();
}
audioRecordRunnable = null;
audioThread = null;
if(recorder != null && recording) {
recording = false;
Log.v(TAG, "Finishing recording, calling stop and release on recorder");
try {
recorder.stop();
recorder.release();
} catch(FFmpegFrameRecorder.Exception e) {
e.printStackTrace();
}
recorder = null;
}
}
//---------------------------------------
// initialize ffmpeg_recorder
//---------------------------------------
private void initRecorder() {
Log.w(TAG, "init recorder");
try {
if (yuvImage == null) {
yuvImage = new Frame(imageWidth, imageHeight, Frame.DEPTH_UBYTE, 2);
Log.i(TAG, "create yuvImage");
}
Log.i(TAG, "ffmpeg_url: " + ffmpeg_link.getAbsolutePath());
Log.i(TAG, "ffmpeg_url: " + ffmpeg_link.exists());
recorder = new FFmpegFrameRecorder(ffmpeg_link, imageWidth, imageHeight, 1);
recorder.setFormat("mp4");
recorder.setSampleRate(sampleAudioRateInHz);
// Set in the surface changed method
recorder.setFrameRate(frameRate);
Log.i(TAG, "recorder initialize success");
audioRecordRunnable = new AudioRecordRunnable();
audioThread = new Thread(audioRecordRunnable);
runAudioThread = true;
} catch (Exception e){
e.printStackTrace();
}
}
//---------------------------------------------
// audio thread, gets and encodes audio data
//---------------------------------------------
class AudioRecordRunnable implements Runnable {
@Override
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
// Audio
int bufferSize;
ShortBuffer audioData;
int bufferReadResult;
bufferSize = AudioRecord.getMinBufferSize(sampleAudioRateInHz,
AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleAudioRateInHz,
AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
audioData = ShortBuffer.allocate(bufferSize);
Log.d(TAG, "audioRecord.startRecording()");
audioRecord.startRecording();
/* ffmpeg_audio encoding loop */
while(runAudioThread) {
//Log.v(TAG,"recording? " + recording);
bufferReadResult = audioRecord.read(audioData.array(), 0, audioData.capacity());
audioData.limit(bufferReadResult);
if(bufferReadResult > 0) {
Log.v(TAG, "bufferReadResult: " + bufferReadResult);
// If "recording" isn't true when start this thread, it never get's set according to this if statement...!!!
// Why? Good question...
if(recording) {
try {
recorder.recordSamples(audioData);
//Log.v(TAG,"recording " + 1024*i + " to " + 1024*i+1024);
} catch(FFmpegFrameRecorder.Exception e) {
Log.v(TAG, e.getMessage());
e.printStackTrace();
}
}
}
}
Log.v(TAG, "AudioThread Finished, release audioRecord");
/* encoding finish, release recorder */
if(audioRecord != null) {
audioRecord.stop();
audioRecord.release();
audioRecord = null;
Log.v(TAG, "audioRecord released");
}
}
}
}
</string></string>OpenCVCameraPreview.java :
package co.timeiseverything.pstimeiseverything;
import android.content.Context;
import android.hardware.Camera;
import android.util.AttributeSet;
import android.util.Log;
import org.opencv.android.JavaCameraView;
import java.io.FileOutputStream;
import java.util.List;
public class OpenCVCameraPreview extends JavaCameraView implements Camera.PictureCallback {
private static final String TAG = OpenCVCameraPreview.class.getSimpleName();
private String mPictureFileName;
public OpenCVCameraPreview(Context context, AttributeSet attrs) {
super(context, attrs);
}
public List<string> getEffectList() {
return mCamera.getParameters().getSupportedColorEffects();
}
public boolean isEffectSupported() {
return (mCamera.getParameters().getColorEffect() != null);
}
public String getEffect() {
return mCamera.getParameters().getColorEffect();
}
public void setEffect(String effect) {
Camera.Parameters params = mCamera.getParameters();
params.setColorEffect(effect);
mCamera.setParameters(params);
}
public List getResolutionList() {
return mCamera.getParameters().getSupportedPreviewSizes();
}
public void setResolution(Camera.Size resolution) {
disconnectCamera();
mMaxHeight = resolution.height;
mMaxWidth = resolution.width;
connectCamera(getWidth(), getHeight());
}
public Camera.Size getResolution() {
return mCamera.getParameters().getPreviewSize();
}
public void takePicture(final String fileName) {
Log.i(TAG, "Taking picture");
this.mPictureFileName = fileName;
// Postview and jpeg are sent in the same buffers if the queue is not empty when performing a capture.
// Clear up buffers to avoid mCamera.takePicture to be stuck because of a memory issue
mCamera.setPreviewCallback(null);
// PictureCallback is implemented by the current class
mCamera.takePicture(null, null, this);
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.i(TAG, "Saving a bitmap to file");
// The camera preview was automatically stopped. Start it again.
mCamera.startPreview();
mCamera.setPreviewCallback(this);
// Write the image in a file (in jpeg format)
try {
FileOutputStream fos = new FileOutputStream(mPictureFileName);
fos.write(data);
fos.close();
} catch (java.io.IOException e) {
Log.e("PictureDemo", "Exception in photoCallback", e);
}
}
}
</string>Gradle :
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "co.timeiseverything.pstimeiseverything"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
packagingOptions {
exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
}
}
repositories {
mavenCentral()
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.google.android.gms:play-services-appindexing:8.1.0'
compile group: 'org.bytedeco', name: 'javacv', version: '1.1'
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-arm'
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-x86'
compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-arm'
compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-x86'
compile project(':openCVLibrary310')
}proguard-rules.pro
Edited by : linkjniLibs :
app/src/main/jniLibs :armeabi armeabi-v7a arm64-v8a mips mips64 x86 x86_64Problem
02-19 11:57:37.684 1759-1759/ I/OpenCVCameraActivity: onClickBtnStartRecord()
02-19 11:57:37.684 1759-1759/ I/OpenCVCameraActivity: startRecording()
02-19 11:57:37.684 1759-1759/ W/OpenCVCameraActivity: init recorder
02-19 11:57:37.691 1759-1759/ I/OpenCVCameraActivity: create yuvImage
02-19 11:57:37.691 1759-1759/ I/OpenCVCameraActivity: ffmpeg_url: /storage/emulated/0/stream.mp4
02-19 11:57:37.696 1759-1759/ I/OpenCVCameraActivity: ffmpeg_url: false
02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x1d arg 0x18cc3
02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x6ffffffe arg 0x21c30
02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x6fffffff arg 0x1
02-19 11:57:37.838 1759-1759/co.timeiseverything.pstimeiseverything E/art: dlopen("/data/app/co.timeiseverything.pstimeiseverything-2/lib/x86/libjniavutil.so", RTLD_LAZY) failed: dlopen failed: cannot locate symbol "av_version_info" referenced by "libjniavutil.so"...
02-19 11:57:37.843 1759-1759/co.timeiseverything.pstimeiseverything I/art: Rejecting re-init on previously-failed class java.lang.Class
02-19 11:57:37.844 1759-1759/co.timeiseverything.pstimeiseverything E/AndroidRuntime: FATAL EXCEPTION: main
Process: co.timeiseverything.pstimeiseverything, PID: 1759
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:4020)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:309)
at org.bytedeco.javacpp.Loader.load(Loader.java:413)
at org.bytedeco.javacpp.Loader.load(Loader.java:381)
at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1650)
at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)
at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:129)
at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.initRecorder(OpenCVCameraActivity.java:320)
at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.startRecording(OpenCVCameraActivity.java:266)
at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.onClickBtnStartRecord2(OpenCVCameraActivity.java:259)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
</init></init></clinit> -
Survey of CD Image Formats
30 avril 2013, par Multimedia Mike — GeneralIn the course of exploring and analyzing the impressive library of CD images curated at the Internet Archive’s Shareware CD collection, one encounters a wealth of methods for copying a complete CD image onto other media for transport. In researching the formats, I have found that many of them are native to various binary, proprietary CD programs that operate under Windows. Since I have an interest in interpreting these image formats and I would also like to do so outside of Windows, I thought to conduct a survey to determine if enough information exists to write processing tools of my own.
Remember from my Grand Unified Theory of Compact Disc that CDs, from a high enough level of software abstraction, are just strings of 2352-byte sectors broken up into tracks. The difference among various types of CDs comes down to the specific meaning of these 2352 bytes.
Most imaging formats rip these strings of sectors into a giant file and then record some metadata information about the tracks and sectors.
ISO
This is perhaps the most common method for storing CD images. It’s generally only applicable to data CD-ROMs. File images generally end with a .iso extension. This refers to ISO-9660 which is the standard CD filesystem.Sometimes, disc images ripped from other types of discs (like Xbox/360 or GameCube discs) bear the extension .iso, which is a bit of a misnomer since they aren’t formatted using the ISO-9660 filesystem. But the extension sort of stuck.
BIN / CUE
I see the BIN & CUE file format combination quite frequently. Reportedly, a program named CDRWIN deployed this format first. This format can handle a mixed mode CD (e.g., starts with a data track and is followed by a series of audio tracks), whereas ISO can only handle the data track. The BIN file contains the raw data while the CUE file is a text file that defines how the BIN file is formatted (how many bytes in a sector, how many sectors to each individual track).CDI
This originates from a program called DiscJuggler. This is extremely prevalent in the Sega Dreamcast hobbyist community for some reason. I studied the raw hex dumps of some sample CDI files but there was no obvious data (mostly 0s). There is an open source utility called cdi2iso which is able to extract an ISO image from a CDI file. The program’s source clued me in that the metadata is actually sitting at the end of the image file. This makes sense when you consider how a ripping program needs to operate– copy tracks, sector by sector, and then do something with the metadata after the fact. Options include : 1) Write metadata at the end of the file (as seen here) ; 2) write metadata into a separate file (seen in other formats on this list) ; 3) write the data at the beginning of the file which would require a full rewrite of the entire (usually large) image file (I haven’t seen this yet).Anyway, I believe I have enough information to write a program that can interpret a CDI file. The reason this format is favored for Dreamcast disc images is likely due to the extreme weirdness of Dreamcast discs (it’s complicated, but eventually fits into my Grand Unified Theory of CDs, if you look at it from a high level).
MDF / MDS
MDF and MDS pairs come from a program called Alcohol 120%. The MDF file has the data while the MDS file contains the metadata. The metadata is in an opaque binary format, though. Thankfully, the Wikipedia page links to a description of the format. That’s another image format down.CCD / SUB / IMG
The CloneCD Control File is one I just ran across today thanks to a new image posted at the IA Shareware Archive (see Super Duke Volume 2). I haven’t found any definitive documentation on this, but it also doesn’t seen too complicated. The .ccd file is a text file that is pretty self-explanatory. The sample linked above, however, only has a .ccd file and a .sub file. I’m led to believe that the .sub file contains subchannel information while a .img file is supposed to contain the binary data.So this rip might be incomplete(nope, the .img file is on the page, in the sidebar ; thanks to Phil in the comments for pointing this out). The .sub file is a bit short compared to the Archive’s description of the disc’s contents (only about 4.6 MB of data) and when I briefly scrolled through, it didn’t look like it contains any real computer data. So it probably is just the disc’s subchannel data (something I glossed over in my Grand Unified Theory).CSO
I have dealt with the CISO (compressed ISO) format before. It’s basically the same as a .iso file described above except that each individual 2048-byte data sector is compressed using zlib. The format boasts up to 9 compression levels, which shouldn’t be a big surprise since that correlates to zlib’s own compression tiers.Others
Wikipedia has a category for optical disc image formats. Of course, there are numerous others. However, I haven’t encountered them in the wild for the purpose of broad image distribution. -
Anomalie #3153 (Fermé) : Problème avec les onglets "Tous" de la médiathèque
24 février 2016, par b bSuper, merci pour le retour :) Intégré par spip:r22860 et spip:r22861
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