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Merge "docs: Camera Features for developers" into ics-mr0

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This commit is contained in:
Joe Fernandez
2011-11-17 17:34:33 -08:00
committed by Android (Google) Code Review
parent 48eaa6c9e5 452e41f607
commit 366113fa1b
3 changed files with 466 additions and 16 deletions
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docs/html/guide/topics/media/camera.jd
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@@ -29,6 +29,15 @@ parent.link=index.html
</ol>
</li>
<li><a href="#saving-media">Saving Media Files</a></li>
<li><a href="#camera-features">Camera Features</a>
<ol>
<li><a href="#check-feature">Checking feature availability</a></li>
<li><a href="#using-features">Using camera features</a></li>
<li><a href="#metering-focus-areas">Metering and focus areas</a></li>
<li><a href="#face-detection">Face detection</a></li>
<li><a href="#time-lapse-video">Time lapse video</a></li>
</ol>
</li>
</ol>
<h2>Key Classes</h2>
<ol>
@@ -39,8 +48,7 @@ parent.link=index.html
</ol>
<h2>See also</h2>
<ol>
<li><a href="{@docRoot}reference/android/hardware/Camera.html">Camera</a></li>
<li><a href="{@docRoot}reference/android/media/MediaRecorder.html">MediaRecorder</a></li>
<li><a href="{@docRoot}guide/topics/media/mediaplayer.html">Media Playback</a></li>
<li><a href="{@docRoot}guide/topics/data/data-storage.html">Data Storage</a></li>
</ol>
</div>
@@ -64,7 +72,7 @@ manifest</a>.</li>
<li><strong>Quick Picture or Customized Camera</strong> - How will your application use the
camera? Are you just interested in snapping a quick picture or video clip, or will your application
provide a new way to use cameras? For a getting a quick snap or clip, consider
provide a new way to use cameras? For a getting a quick snap or clip, consider
<a href="#intents">Using Existing Camera Apps</a>. For developing a customized camera feature, check
out the <a href="#custom-camera">Building a Camera App</a> section.</li>
@@ -85,7 +93,7 @@ classes:</p>
<dl>
<dt>{@link android.hardware.Camera}</dt>
<dd>This class is the primary API for controlling device cameras. This class is used to take
pictures or videos when you are building a camera application.</a>.</dd>
pictures or videos when you are building a camera application.</dd>
<dt>{@link android.view.SurfaceView}</dt>
<dd>This class is used to present a live camera preview to the user.</dd>
@@ -120,8 +128,8 @@ for example:
<pre>
&lt;uses-feature android:name=&quot;android.hardware.camera&quot; /&gt;
</pre>
<p>For a list of camera features, see the manifest <a
href="{@docRoot}guide/topics/manifest/uses-feature-element.html#features-reference">Features
<p>For a list of camera features, see the manifest
<a href="{@docRoot}guide/topics/manifest/uses-feature-element.html#hw-features">Features
Reference</a>.</p>
<p>Adding camera features to your manifest causes Android Market to prevent your application from
being installed to devices that do not include a camera or do not support the camera features you
@@ -148,6 +156,15 @@ application must request the audio capture permission.
&lt;uses-permission android:name="android.permission.RECORD_AUDIO" /&gt;
</pre>
</li>
<li><strong>Location Permission</strong> - If your application tags images with GPS location
information, you must request location permission:
<pre>
&lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
</pre>
<p>For more information about getting user location, see
<a href="{@docRoot}guide/topics/location/obtaining-user-location.html">Obtaining User
Location</a>.</p>
</li>
</ul>
@@ -224,8 +241,8 @@ After the user finishes taking a picture (or cancels the operation), the user in
your application, and you must intercept the {@link
android.app.Activity#onActivityResult(int, int, android.content.Intent) onActivityResult()}
method to receive the result of the intent and continue your application execution. For information
on how to receive the completed intent, see <a href="#intent-receive">Receiving Camera Intent
Result</a>.</p>
on how to receive the completed intent, see <a href="#intent-receive">Receiving camera intent
result</a>.</p>
<h3 id="intent-video">Video capture intent</h3>
@@ -360,8 +377,8 @@ properly release it for use by other applications.</li>
<p>Camera hardware is a shared resource that must be carefully managed so your application does
not collide with other applications that may also want to use it. The following sections discusses
how to detect camera hardware, how to request access to a camera and how to release it when your
application is done using it.</p>
how to detect camera hardware, how to request access to a camera, how to capture pictures or video
and how to release the camera when your application is done using it.</p>
<p class="caution"><strong>Caution:</strong> Remember to release the {@link android.hardware.Camera}
object by calling the {@link android.hardware.Camera#release() Camera.release()} when your
@@ -492,7 +509,8 @@ public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback
// ignore: tried to stop a non-existent preview
}
// make any resize, rotate or reformatting changes here
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
@@ -506,6 +524,12 @@ public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback
}
</pre>
<p>If you want to set a specific size for your camera preview, set this in the {@code
surfaceChanged()} method as noted in the comments above. When setting preview size, you
<em>must use</em> values from {@link android.hardware.Camera.Parameters#getSupportedPreviewSizes}.
<em>Do not</em> set arbitrary values in the {@link
android.hardware.Camera.Parameters#setPreviewSize setPreviewSize()} method.</p>
<h3 id="preview-layout">Placing preview in a layout</h3>
<p>A camera preview class, such as the example shown in the previous section, must be placed in the
@@ -780,6 +804,10 @@ without creating a camera preview first and skip the first few steps of this pro
since users typically prefer to see a preview before starting a recording, that process is not
discussed here.</p>
<p class="note"><strong>Tip:</strong> If your application is typically used for recording video, set
{@link android.hardware.Camera.Parameters#setRecordingHint} to {@code true} prior to starting your
preview. This setting can help reduce the time it takes to start recording.</p>
<h4 id="configuring-mediarecorder">Configuring MediaRecorder</h4>
<p>When using the {@link android.media.MediaRecorder} class to record video, you must perform
configuration steps in a <em>specific order</em> and then call the {@link
@@ -851,7 +879,7 @@ setAudioChannels()}</li>
<li>{@link android.media.MediaRecorder#setAudioSamplingRate(int) setAudioSamplingRate()}</li>
</ul>
<h4 id="start-stop-mediarecorder">Starting and Stopping MediaRecorder</h4>
<h4 id="start-stop-mediarecorder">Starting and stopping MediaRecorder</h4>
<p>When starting and stopping video recording using the {@link android.media.MediaRecorder} class,
you must follow a specific order, as listed below.</p>
@@ -938,7 +966,7 @@ public class CameraActivity extends Activity {
private MediaRecorder mMediaRecorder;
...
&#64;Override
protected void onPause() {
super.onPause();
@@ -1052,4 +1080,425 @@ instead. For more information, see <a
href="{@docRoot}guide/topics/data/data-storage.html#SavingSharedFiles">Saving Shared Files</a>.</p>
<p>For more information about saving files on an Android device, see <a
href="{@docRoot}guide/topics/data/data-storage.html">Data Storage</a>.</p>
href="{@docRoot}guide/topics/data/data-storage.html">Data Storage</a>.</p>
<h2 id="camera-features">Camera Features</h2>
<p>Android supports a wide array of camera features you can control with your camera application,
such as picture format, flash mode, focus settings, and many more. This section lists the common
camera features, and briefly discusses how to use them. Most camera features can be accessed and set
using the through {@link android.hardware.Camera.Parameters} object. However, there are several
important features that require more than simple settings in {@link
android.hardware.Camera.Parameters}. These features are covered in the following sections:<p>
<ul>
<li><a href="#metering-focus-areas">Metering and focus areas</a></li>
<li><a href="#face-detection">Face detection</a></li>
<li><a href="#time-lapse-video">Time lapse video</a></li>
</ul>
<p>For general information about how to use features that are controlled through {@link
android.hardware.Camera.Parameters}, review the <a href="#using-features">Using camera
features</a> section. For more detailed information about how to use features controlled through the
camera parameters object, follow the links in the feature list below to the API reference
documentation.</p>
<p class="table-caption" id="table1">
<strong>Table 1.</strong> Common camera features sorted by the Android API Level in which they
were introduced.</p>
<table>
<tr>
<th>Feature</th> <th>API Level</th> <th>Description</th>
</tr>
<tr>
<td><a href="#face-detection">Face Detection</a></td>
<td>14</td>
<td>Identify human faces within a picture and use them for focus, metering and white
balance</td>
</tr>
<tr>
<td><a href="#metering-focus-areas">Metering Areas</a></td>
<td>14</td>
<td>Specify one or more areas within an image for calculating white balance</td>
</tr>
<tr>
<td><a href="#metering-focus-areas">Focus Areas</a></td>
<td>14</td>
<td>Set one or more areas within an image to use for focus</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock White Balance Lock}</td>
<td>14</td>
<td>Stop or start automatic white balance adjustments</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setAutoExposureLock Exposure Lock}</td>
<td>14</td>
<td>Stop or start automatic exposure adjustments</td>
</tr>
<tr>
<td>{@link android.hardware.Camera#takePicture Video Snapshot}</td>
<td>14</td>
<td>Take a picture while shooting video (frame grab)</td>
</tr>
<tr>
<td><a href="#time-lapse-video">Time Lapse Video</a></td>
<td>11</td>
<td>Record frames with set delays to record a time lapse video</td>
</tr>
<tr>
<td>{@link android.hardware.Camera#open(int) Multiple Cameras}</td>
<td>9</td>
<td>Support for more than one camera on a device, including front-facing and back-facing
cameras</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#getFocusDistances Focus Distance}</td>
<td>9</td>
<td>Reports distances between the camera and objects that appear to be in focus</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setZoom Zoom}</td>
<td>8</td>
<td>Set image magnification</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setExposureCompensation Exposure
Compensation}</td>
<td>8</td>
<td>Increase or decrease the light exposure level</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setGpsLatitude GPS Data}</td>
<td>5</td>
<td>Include or omit geographic location data with the image</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setWhiteBalance White Balance}</td>
<td>5</td>
<td>Set the white balance mode, which affects color values in the captured image</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setFocusMode Focus Mode}</td>
<td>5</td>
<td>Set how the camera focuses on a subject such as automatic, fixed, macro or infinity</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setSceneMode Scene Mode}</td>
<td>5</td>
<td>Apply a preset mode for specific types of photography situations such as night, beach, snow
or candlelight scenes</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setJpegQuality JPEG Quality}</td>
<td>5</td>
<td>Set the compression level for a JPEG image, which increases or decreases image output file
quality and size</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setFlashMode Flash Mode}</td>
<td>5</td>
<td>Turn flash on, off, or use automatic setting</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setColorEffect Color Effects}</td>
<td>5</td>
<td>Apply a color effect to the captured image such as black and white, sepia tone or negative.
</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setAntibanding Anti-Banding}</td>
<td>5</td>
<td>Reduces the effect of banding in color gradients due to JPEG compression</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setPictureFormat Picture Format}</td>
<td>1</td>
<td>Specify the file format for the picture</td>
</tr>
<tr>
<td>{@link android.hardware.Camera.Parameters#setPictureSize Picture Size}</td>
<td>1</td>
<td>Specify the pixel dimensions of the saved picture</td>
</tr>
</table>
<p class="note"><strong>Note:</strong> These features are not supported on all devices due to
hardware differences and software implementation. For information on checking the availability
of features on the device where your application is running, see <a href="#check-feature">Checking
feature availability</a>.</p>
<h3 id="check-feature">Checking feature availability</h3>
<p>The first thing to understand when setting out to use camera features on Android devices is that
not all camera features are supported on all devices. In addition, devices that support a particular
feature may support them to different levels or with different options. Therefore, part of your
decision process as you develop a camera application is to decide what camera features you want to
support and to what level. After making that decision, you should plan on including code in your
camera application that checks to see if device hardware supports those features and fails
gracefully if a feature is not available.</p>
<p>You can check the availabilty of camera features by getting an instance of a camera’s parameters
object, and checking the relevant methods. The following code sample shows you how to obtain a
{@link android.hardware.Camera.Parameters} object and check if the camera supports the autofocus
feature:</p>
<pre>
// get Camera parameters
Camera.Parameters params = mCamera.getParameters();
List&lt;String&gt; focusModes = params.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
// Autofocus mode is supported
}
</pre>
<p>You can use the technique shown above for most camera features. The
{@link android.hardware.Camera.Parameters} object provides a {@code getSupported...()}, {@code
is...Supported()} or {@code getMax...()} method to determine if (and to what extent) a feature is
supported.</p>
<p>If your application requires certain camera features in order to function properly, you can
require them through additions to your application manifest. When you declare the use of specific
camera features, such as flash and auto-focus, the Android Market restricts your application from
being installed on devices which do not support these features. For a list of camera features that
can be declared in your app manifest, see the manifest
<a href="{@docRoot}guide/topics/manifest/uses-feature-element.html#hw-features"> Features
Reference</a>.</p>
<h3 id="using-features">Using camera features</h3>
<p>Most camera features are activated and controlled using a {@link
android.hardware.Camera.Parameters} object. You obtain this object by first getting an instance of
the {@link android.hardware.Camera} object, calling the {@link
android.hardware.Camera#getParameters getParameters()} method, changing the returned parameter
object and then setting it back into the camera object, as demonstrated in the following example
code:</p>
<pre>
// get Camera parameters
Camera.Parameters params = mCamera.getParameters();
// set the focus mode
params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
// set Camera parameters
mCamera.setParameters(params);
</pre>
<p>This technique works for nearly all camera features, and most parameters can be changed at any
time after you have obtained an instance of the {@link android.hardware.Camera} object. Changes to
parameters are typically visible to the user immediately in the application’s camera preview.
On the software side, parameter changes may take several frames to actually take effect as the
camera hardware processes the new instructions and then sends updated image data.</p>
<p class="caution"><strong>Important:</strong> Some camera features cannot be changed at will. In
particular, changing the size or orientation of the camera preview requires that you first stop the
preview, change the preview size, and then restart the preview. Starting with Android 4.0 (API
Level 14) preview orientation can be changed without restarting the preview.</p>
<p>Other camera features require more code in order to implement, including:</p>
<ul>
<li>Metering and focus areas</li>
<li>Face detection</li>
<li>Time lapse video</li>
</ul>
<p>A quick outline of how to implement these features is provided in the following sections.</p>
<h3 id="metering-focus-areas">Metering and focus areas</h3>
<p>In some photographic scenarios, automatic focusing and light metering may not produce the
desired results. Starting with Android 4.0 (API Level 14), your camera application can provide
additional controls to allow your app or users to specify areas in an image to use for determining
focus or light level settings and pass these values to the camera hardware for use in capturing
images or video.</p>
<p>Areas for metering and focus work very similarly to other camera features, in that you control
them through methods in the {@link android.hardware.Camera.Parameters} object. The following code
demonstrates setting two light metering areas for an instance of
{@link android.hardware.Camera}:</p>
<pre>
// Create an instance of Camera
mCamera = getCameraInstance();
// set Camera parameters
Camera.Parameters params = mCamera.getParameters();
if (params.getMaxNumMeteringAreas() > 0){ // check that metering areas are supported
List&lt;Camera.Area&gt; meteringAreas = new ArrayList&lt;Camera.Area&gt;();
Rect areaRect1 = new Rect(-100, -100, 100, 100); // specify an area in center of image
meteringAreas.add(new Camera.Area(areaRect1, 600)); // set weight to 60%
Rect areaRect2 = new Rect(800, -1000, 1000, -800); // specify an area in upper right of image
meteringAreas.add(new Camera.Area(areaRect2, 400)); // set weight to 40%
params.setMeteringAreas(meteringAreas);
}
mCamera.setParameters(params);
</pre>
<p>The {@link android.hardware.Camera.Area} object contains two data parameters: A {@link
android.graphics.Rect} object for specifying an area within the camera’s field of view and a weight
value, which tells the camera what level of importance this area should be given in light metering
or focus calculations.</p>
<p>The {@link android.graphics.Rect} field in a {@link android.hardware.Camera.Area} object
describes a rectangular shape mapped on a 2000 x 2000 unit grid. The coordinates -1000, -1000
represent the top, left corner of the camera image, and coordinates 1000, 1000 represent the
bottom, right corner of the camera image, as shown in the illustration below.</p>
<img src='images/camera-area-coordinates.png' />
<p class="img-caption">
<strong>Figure 1.</strong> The red lines illustrate the coordinate system for specifying a
{@link android.hardware.Camera.Area} within a camera preview. The blue box shows the location and
shape of an camera area with the {@link android.graphics.Rect} values 333,333,667,667.
</p>
<p>The bounds of this coordinate system always correspond to the outer edge of the image visible in
the camera preview and do not shrink or expand with the zoom level. Similarly, rotation of the image
preview using {@link android.hardware.Camera#setDisplayOrientation Camera.setDisplayOrientation()}
does not remap the coordinate system.</p>
<h3 id="face-detection">Face detection</h3>
<p>For pictures that include people, faces are usually the most important part of the picture, and
should be used for determining both focus and white balance when capturing an image. The Android 4.0
(API Level 14) framework provides APIs for identifying faces and calculating picture settings using
face recognition technology.</p>
<p class="note"><strong>Note:</strong> While the face detection feature is running,
{@link android.hardware.Camera.Parameters#setWhiteBalance},
{@link android.hardware.Camera.Parameters#setFocusAreas} and
{@link android.hardware.Camera.Parameters#setMeteringAreas} have no effect.</p>
<p>Using the face detection feature in your camera application requires a few general steps:</p>
<ul>
<li>Check that face detection is supported on the device</li>
<li>Create a face detection listener</li>
<li>Add the face detection listener to your camera object</li>
<li>Start face detection after preview (and after <em>every</em> preview restart)</li>
</ul>
<p>The face detection feature is not supported on all devices. You can check that this feature is
supported by calling {@link android.hardware.Camera.Parameters#getMaxNumDetectedFaces}. An
example of this check is shown in the {@code startFaceDetection()} sample method below.</p>
<p>In order to be notified and respond to the detection of a face, your camera application must set
a listener for face detection events. In order to do this, you must create a listener class that
implements the {@link android.hardware.Camera.FaceDetectionListener} interface as shown in the
example code below.</p>
<pre>
class MyFaceDetectionListener implements Camera.FaceDetectionListener {
&#064;Override
public void onFaceDetection(Face[] faces, Camera camera) {
if (faces.length > 0){
Log.d("FaceDetection", "face detected: "+ faces.length +
" Face 1 Location X: " + faces[0].rect.centerX() +
"Y: " + faces[0].rect.centerY() );
}
}
}
</pre>
<p>After creating this class, you then set it into your application’s
{@link android.hardware.Camera} object, as shown in the example code below:</p>
<pre>
mCamera.setFaceDetectionListener(new MyFaceDetectionListener());
</pre>
<p>Your application must start the face detection function each time you start (or restart) the
camera preview. Create a method for starting face detection so you can call it as needed, as shown
in the example code below.</p>
<pre>
public void startFaceDetection(){
// Try starting Face Detection
Camera.Parameters params = mCamera.getParameters();
// start face detection only *after* preview has started
if (params.getMaxNumDetectedFaces() > 0){
// camera supports face detection, so can start it:
mCamera.startFaceDetection();
}
}
</pre>
<p>You must start face detection <em>each time</em> you start (or restart) the camera preview. If
you use the preview class shown in <a href="#camera-preview">Creating a preview class</a>, add your
{@link android.hardware.Camera#startFaceDetection startFaceDetection()} method to both the
{@link android.view.SurfaceHolder.Callback#surfaceCreated surfaceCreated()} and {@link
android.view.SurfaceHolder.Callback#surfaceChanged surfaceChanged()} methods in your preview class,
as shown in the sample code below.</p>
<pre>
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
startFaceDetection(); // start face detection feature
} catch (IOException e) {
Log.d(TAG, "Error setting camera preview: " + e.getMessage());
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
if (mHolder.getSurface() == null){
// preview surface does not exist
Log.d(TAG, "mHolder.getSurface() == null");
return;
}
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
Log.d(TAG, "Error stopping camera preview: " + e.getMessage());
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
startFaceDetection(); // re-start face detection feature
} catch (Exception e){
// ignore: tried to stop a non-existent preview
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
</pre>
<p class="note"><strong>Note:</strong> Remember to call this method <em>after</em> calling
{@link android.hardware.Camera#startPreview startPreview()}. Do not attempt to start face detection
in the {@link android.app.Activity#onCreate onCreate()} method of your camera app’s main activity,
as the preview is not available by this point in your application's the execution.</p>
<h3 id="time-lapse-video">Time lapse video</h3>
<p>Time lapse video allows users to create video clips that combine pictures taken a few seconds or
minutes apart. This feature uses {@link android.media.MediaRecorder} to record the images for a time
lapse sequence. </p>
<p>To record a time lapse video with {@link android.media.MediaRecorder}, you must configure the
recorder object as if you are recording a normal video, setting the captured frames per second to a
low number and using one of the time lapse quality settings, as shown in the code example below.</p>
<pre>
// Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_TIME_LAPSE_HIGH));
...
// Step 5.5: Set the video capture rate to a low number
mMediaRecorder.setCaptureRate(0.1); // capture a frame every 10 seconds
</pre>
<p>These settings must be done as part of a larger configuration procedure for {@link
android.media.MediaRecorder}. For a full configuration code example, see <a
href="#configuring-mediarecorder">Configuring MediaRecorder</a>. Once the configuration is complete,
you start the video recording as if you were recording a normal video clip. For more information
about configuring and running {@link android.media.MediaRecorder}, see <a
href="#capture-video">Capturing videos</a>.</p>

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docs/html/guide/topics/media/index.jd
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@@ -6,7 +6,7 @@ page.title=Multimedia and Camera
<h2>Topics</h2>
<ol>
<li><a href="{@docRoot}guide/topics/media/mediaplayer.html">MediaPlayer</a></li>
<li><a href="{@docRoot}guide/topics/media/mediaplayer.html">Media Playback</a></li>
<li><a href="{@docRoot}guide/topics/media/jetplayer.html">JetPlayer</a></li>
<li><a href="{@docRoot}guide/topics/media/camera.html">Camera</a></li>
<li><a href="{@docRoot}guide/topics/media/audio-capture.html">Audio Capture</a></li>
@@ -46,7 +46,8 @@ hardware.</p>
and playback.</p>
<dl>
<dt><strong><a href="{@docRoot}guide/topics/media/mediaplayer.html">MediaPlayer</a></strong></dt>
<dt><strong><a href="{@docRoot}guide/topics/media/mediaplayer.html">Media Playback</a></strong>
</dt>
<dd>How to play audio and video in your application.</dd>
<dt><strong><a href="{@docRoot}guide/topics/media/jetplayer.html">JetPlayer</a></strong></dt>