7 ORDVideo

Oracle interMedia ("interMedia") contains the following information about the ORDVideo object type:

ORDVideo Object Type
ORDVideo Constructors
ORDVideo Methods

The examples in this chapter use the ONLINE_MEDIA table in the Product Media sample schema. To replicate the examples on your own computer, you should begin with the examples shown in the reference pages for the ORDVideo constructors and the import( ) and importFrom( ) methods. Substitute video files you have for the ones shown in the examples. In addition, for a user "ron" to use the examples, the following statements must be issued before ron executes the examples, where "/mydir/work" is the directory where ron will find the video data:

CONNECT /as sysdba
CREATE OR REPLACE DIRECTORY FILE_DIR as '/mydir/work';
GRANT READ ON DIRECTORY FILE_DIR TO 'user';

See Oracle Database Sample Schemas for information about the sample schemas.

Note:

If you manipulate the video data itself (by either directly modifying the BLOB or changing the external source), then you must ensure that the object attributes stay synchronized and the update time is modified; otherwise, the object attributes will not match the video data.

Methods invoked at the ORDSource level that are handed off to the source plug-in for processing have ctx (RAW) as the first argument. Before calling any of these methods for the first time, the client should allocate the ctx structure, initialize it to NULL, and invoke the openSource( ) method. At this point, the source plug-in can initialize context for this client. When processing is complete, the client should invoke the closeSource( ) method.

Methods invoked from a source plug-in call have the first argument as ctx (RAW).

Methods invoked at the ORDVideo level that are handed off to the format plug-in for processing have ctx (RAW) as the first argument. Before calling any of these methods for the first time, the client should allocate the ctx structure and initialize it to NULL.

Note:

In the current release, none of the plug-ins provided by Oracle and not all source or format plug-ins will use the ctx argument, but if you code as previously described, your application should work with current or future source or format plug-ins.

You should use any of the individual set methods to set the attribute value for an object for formats not natively supported; otherwise, for formats natively supported, use the setProperties( ) method to populate the attributes of the object or write a format plug-in.

ORDVideo Object Type

The ORDVideo object type supports the storage and management of video data. This object type is defined as follows in the ordvspec.sql file:

CREATE OR REPLACE TYPE ORDVideo
AS OBJECT
(
  -- ATTRIBUTES 
description         VARCHAR2(4000),
source              ORDSource,
format              VARCHAR2(31),
mimeType            VARCHAR2(4000),
comments            CLOB, 
  -- VIDEO RELATED ATTRIBUTES 
width               INTEGER,
height              INTEGER,
frameResolution     INTEGER,
frameRate           INTEGER,
videoDuration       INTEGER,
numberOfFrames      INTEGER,
compressionType     VARCHAR2(4000),
numberOfColors      INTEGER,
bitRate             INTEGER,

  -- METHODS
-- CONSTRUCTORS
--
STATIC FUNCTION init( ) RETURN ORDVideo,
STATIC FUNCTION init(srcType     IN VARCHAR2,
                     srcLocation IN VARCHAR2,
                     srcName     IN VARCHAR2) RETURN ORDVideo,
--
-- Methods associated with the date attribute
MEMBER FUNCTION getUpdateTime RETURN DATE,
PRAGMA RESTRICT_REFERENCES(getUpdateTime, WNDS, WNPS, RNDS, RNPS),
MEMBER PROCEDURE setUpdateTime(current_time DATE),
--
-- Methods associated with the description attribute
MEMBER PROCEDURE setDescription(user_description IN VARCHAR2),
MEMBER FUNCTION getDescription RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getDescription, WNDS, WNPS, RNDS, RNPS),
--
-- Methods associated with the mimeType attribute
MEMBER FUNCTION getMimeType RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getMimeType, WNDS, WNPS, RNDS, RNPS),
MEMBER PROCEDURE setMimeType(mime IN VARCHAR2),
--
-- Methods associated with the source attribute
MEMBER FUNCTION processSourceCommand(
                                     ctx       IN OUT RAW,
                                     cmd       IN VARCHAR2,
                                     arguments IN VARCHAR2,
                                     result    OUT RAW)
                RETURN RAW,
--
MEMBER FUNCTION  getSourceObject RETURN ORDSource,
PRAGMA RESTRICT_REFERENCES(getSourceObject, WNDS, WNPS, RNDS, RNPS),
--
MEMBER FUNCTION  isLocal RETURN BOOLEAN,
PRAGMA RESTRICT_REFERENCES(isLocal, WNDS, WNPS, RNDS, RNPS),
MEMBER PROCEDURE  setLocal( ),
MEMBER PROCEDURE  clearLocal( ),
MEMBER PROCEDURE setSource(source_type     IN VARCHAR2,
                           source_location IN VARCHAR2,
                           source_name     IN VARCHAR2),
MEMBER FUNCTION getSource RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getSource, WNDS, WNPS, RNDS, RNPS),
--
MEMBER FUNCTION getSourceType RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getSourceType, WNDS, WNPS, RNDS, RNPS),
--
MEMBER FUNCTION getSourceLocation RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getSourceLocation, WNDS, WNPS, RNDS, RNPS),
--
MEMBER FUNCTION getSourceName RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getSourceName, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE import(ctx IN OUT RAW),
MEMBER PROCEDURE importFrom(ctx             IN OUT RAW,
                            source_type     IN VARCHAR2,
                            source_location IN VARCHAR2,
                            source_name     IN VARCHAR2),
--
MEMBER PROCEDURE export(ctx             IN OUT RAW,
                        source_type     IN VARCHAR2,
                        source_location IN VARCHAR2,
                        source_name     IN VARCHAR2), 
--
MEMBER FUNCTION  getContentLength RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getContentLength, WNDS, WNPS, RNDS, RNPS),
MEMBER FUNCTION getContentLength(ctx IN OUT RAW) RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getContentLength, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE getContentInLob(ctx      IN OUT RAW,
                                dest_lob  IN OUT NOCOPY BLOB,
                                mimeType  OUT VARCHAR2,
                                format    OUT VARCHAR2),
--
MEMBER FUNCTION getContent RETURN BLOB,
PRAGMA RESTRICT_REFERENCES(getContent, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE deleteContent( ),
--
-- Methods associated with file operations on the source
MEMBER FUNCTION openSource(userArg IN RAW, ctx OUT RAW) RETURN INTEGER,
--
MEMBER FUNCTION closeSource(ctx IN OUT RAW) RETURN INTEGER,
--
MEMBER FUNCTION trimSource(ctx     IN OUT RAW,
                           newlen  IN INTEGER) RETURN INTEGER,
--
MEMBER PROCEDURE readFromSource(ctx      IN OUT RAW,
                                startPos IN INTEGER,
                                numBytes IN OUT INTEGER,
                                buffer   OUT RAW), 
--
MEMBER PROCEDURE writeToSource(ctx      IN OUT RAW,
                               startPos IN INTEGER,
                               numBytes IN OUT INTEGER,
                               buffer   IN RAW), 
--
-- Methods associated with the video attributes accessors
MEMBER PROCEDURE setFormat(knownformat IN VARCHAR2),
MEMBER FUNCTION getFormat RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getFormat, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setFrameSize(knownWidth IN INTEGER, knownHeight IN INTEGER),
MEMBER PROCEDURE getFrameSize(retWidth OUT INTEGER, retHeight OUT INTEGER),
PRAGMA RESTRICT_REFERENCES(getFrameSize, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setFrameResolution(knownFrameResolution IN INTEGER),
MEMBER FUNCTION getFrameResolution RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getFrameResolution, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setFrameRate(knownFrameRate IN INTEGER),
MEMBER FUNCTION getFrameRate RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getFrameRate, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setVideoDuration(knownVideoDuration IN INTEGER),
MEMBER FUNCTION getVideoDuration RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getVideoDuration, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setNumberOfFrames(knownNumberOfFrames IN INTEGER),
MEMBER FUNCTION getNumberOfFrames RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getNumberOfFrames, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setCompressionType(knownCompressionType IN VARCHAR2),
MEMBER FUNCTION getCompressionType RETURN VARCHAR2,
PRAGMA RESTRICT_REFERENCES(getCompressionType, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setNumberOfColors(knownNumberOfColors IN INTEGER),
MEMBER FUNCTION getNumberOfColors RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getNumberOfColors, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setBitRate(knownBitRate IN INTEGER),
MEMBER FUNCTION getBitRate RETURN INTEGER,
PRAGMA RESTRICT_REFERENCES(getBitRate, WNDS, WNPS, RNDS, RNPS),
--
MEMBER FUNCTION getBFILE RETURN BFILE,
PRAGMA RESTRICT_REFERENCES(getBFILE, WNDS, WNPS, RNDS, RNPS),
--
MEMBER PROCEDURE setKnownAttributes(knownFormat IN VARCHAR2,
                                    knownWidth IN INTEGER,
                                    knownHeight IN INTEGER,
                                    knownFrameResolution IN INTEGER,
                                    knownFrameRate IN INTEGER,
                                    knownVideoDuration IN INTEGER
                                    knownNumberOfFrames IN INTEGER,
                                    knownCompressionType IN VARCHAR2,
                                    knownNumberOfColors IN INTEGER,
                                    knownBitRate IN INTEGER),
--
-- Methods associated with setting all the properties
MEMBER PROCEDURE setProperties(SELF IN OUT NOCOPY ORDVideo, ctx IN OUT RAW),
MEMBER PROCEDURE setProperties(ctx         IN OUT RAW,
                               setComments IN BOOLEAN),
MEMBER FUNCTION checkProperties(ctx IN OUT RAW) RETURN BOOLEAN,
--
MEMBER FUNCTION getAttribute(ctx  IN OUT RAW,
                             name IN VARCHAR2) RETURN VARCHAR2,
--
MEMBER PROCEDURE getAllAttributes(ctx        IN OUT RAW,
                                  attributes IN OUT NOCOPY CLOB), 
--
-- Methods associated with video processing
MEMBER FUNCTION processVideoCommand(
                                    ctx       IN OUT RAW,
                                    cmd       IN VARCHAR2,
                                    arguments IN VARCHAR2,
                                    result    OUT RAW)
                    RETURN RAW
);

where:

description: the description of the video object.
source: the ORDSource where the video data is to be found.
format: the format in which the video data is stored.
mimeType: the MIME type information.
comments: the metadata information of the video object.
width: the width of each frame of the video data.
height: the height of each frame of the video data.
frameResolution: the frame resolution of the video data.
frameRate: the frame rate of the video data.
videoDuration: the total duration of the video data stored.
numberOfFrames: the number of frames in the video data.
compressionType: the compression type of the video data.
numberOfColors: the number of colors in the video data.
bitRate: the bit rate of the video data.

Note:
The comments attribute is populated by the setProperties( ) method when the setComments parameter is TRUE. Oracle recommends that you not write to this attribute directly.

ORDVideo Constructors

This section describes the interMedia constructor functions, which are as follow:

init( ) for ORDVideo
init(srcType,srcLocation,srcName) for ORDVideo

init( ) for ORDVideo

Format

init( ) RETURN ORDVideo;

Description

Initializes instances of the ORDVideo object type.

Parameters

None.

Pragmas

None.

Exceptions

None.

Usage Notes

This constructor is a static method that initializes all the ORDVideo attributes to NULL with the following exceptions:

source.updateTime is set to SYSDATE
source.local is set to 1 (local)
source.localData is set to empty_blob

You should begin using the init( ) method as soon as possible to allow you to more easily initialize the ORDVideo object type, especially if the ORDVideo type evolves and attributes are added in a future release. INSERT statements left unchanged using the default constructor (which initializes each object attribute), will fail under these circumstances.

Examples

Initialize the ORDVideo object attributes:

BEGIN
 INSERT INTO pm.online_media (product_id, product_video) 
 VALUES (2004, ORDSYS.ORDVideo.init());
 COMMIT;
END;
/

init(srcType,srcLocation,srcName) for ORDVideo

Format

init(srcType IN VARCHAR2,

srcLocation IN VARCHAR2,

srcName IN VARCHAR2)

RETURN ORDVideo;

Description

Initializes instances of the ORDVideo object type.

Parameters

srcType: The source type of the video data.
srcLocation: The source location of the video data.
srcName: The source name of the video data.

Pragmas

None.

Exceptions

None.

Usage Notes

This constructor is a static method that initializes all the ORDVideo attributes to NULL with the following exceptions:

source.updateTime is set to SYSDATE
source.local is set to 0
source.localData is set to empty_blob
source.srcType is set to the input value
source.srcLocation is set to the input value
source.srcName is set to the input value

Examples

Initialize the ORDVideo object attributes:

BEGIN
 INSERT INTO pm.online_media (product_id, product_video) 
 VALUES (2030, ORDSYS.ORDVideo.init('FILE', 'FILE_DIR','speakers.rm'));
 COMMIT;
END;
/

ORDVideo Methods

This section presents reference information on the interMedia methods used specifically for video data manipulation.

Chapter 2 presents reference information on the interMedia methods that are common to ORDAudio, ORDDoc, ORDImage, and ORDVideo. Use the methods presented in both chapters to get and set attributes, and to perform metadata extractions.

For more information about object types and methods, see Oracle Database Concepts.

The following methods are presented in this section:

checkProperties( )
getAllAttributes( )
getAttribute( )
getBitRate( )
getCompressionType( )
getContentInLob( )
getContentLength( )
getDescription( )
getFormat( )
getFrameRate( )
getFrameResolution( )
getFrameSize( )
getNumberOfColors( )
getNumberOfFrames( )
getVideoDuration( )
import( )
importFrom( )
processVideoCommand( )
setBitRate( )
setCompressionType( )
setDescription( )
setFormat( )
setFrameRate( )
setFrameResolution( )
setFrameSize( )
setKnownAttributes( )
setNumberOfColors( )
setNumberOfFrames( )
setProperties( )
setVideoDuration( )

checkProperties( )

Format

checkProperties(ctx IN OUT RAW) RETURN BOOLEAN;

Description

Checks all the properties of the stored video data, including the following video attributes: format, width, height, frame resolution, frame rate, video duration, number of frames, compression type, number of colors, and bit rate.

Parameters

ctx: The format plug-in context information.

Usage Notes

The checkProperties( ) method does not check the MIME type because a file can have multiple correct MIME types and this is not well defined.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the checkProperties( ) method and the video plug-in raises an exception when calling this method.

See Appendix G for more information about these exceptions.

Examples

Check property information for known video attributes:

DECLARE
 obj ORDSYS.ORDVideo;
 ctx RAW(64) :=NULL;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
   WHERE p.product_id  = 2030;
 IF(obj.checkProperties(ctx)) THEN
  DBMS_OUTPUT.PUT_LINE('check Properties returned true');
 ELSE
  DBMS_OUTPUT.PUT_LINE('check Properties returned false');
 END IF;
 COMMIT;
 EXCEPTION
  WHEN ORDSYS.ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION THEN
   DBMS_OUTPUT.PUT_LINE('ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION caught');
  WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('EXCEPTION caught');
END;
/

getAllAttributes( )

Format

getAllAttributes(ctx IN OUT RAW,

attributes IN OUT NOCOPY CLOB);

Description

Returns a formatted string for convenient client access. For natively supported formats, the string includes the following list of audio data attributes separated by a comma (,): width, height, format, frameResolution, frameRate, videoDuration, numberOfFrames, compressionType, numberOfColors, and bitRate. For user-defined formats, the string is defined by the format plug-in.

Parameters

ctx: The format plug-in context information.
attributes: The attributes.

Usage Notes

Generally, these video data attributes are available from the header of the formatted video data.

Video data attribute information can be extracted from the video data itself. You can extend support to a video format that is not understood by the ORDVideo object by implementing an ORDPLUGINS.ORDX_<format>_VIDEO package that supports that format. See Oracle interMedia User's Guide for more information.

Pragmas

None.

Exceptions

ORDVideoExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the getAllAttributes( ) method and the video plug-in raises an exception when calling this method.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Return all video attributes for video data stored in the database:

DECLARE
 obj ORDSYS.ORDVideo;
 tempLob   CLOB;
 ctx RAW(64) :=NULL;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 DBMS_OUTPUT.PUT_LINE('getting comma separated list of all attributes');
 DBMS_OUTPUT.PUT_LINE('---------------------------------------------');
 DBMS_LOB.CREATETEMPORARY(tempLob, FALSE, DBMS_LOB.CALL);
 obj.getAllAttributes(ctx,tempLob);
 DBMS_OUTPUT.PUT_LINE(DBMS_LOB.substr(tempLob, DBMS_LOB.getLength(tempLob),1));
 COMMIT;
 EXCEPTION
  WHEN ORDSYS.ORDVideoExceptions.METHOD_NOT_SUPPORTED THEN
   DBMS_OUTPUT.PUT_LINE('VIDEO METHOD_NOT_SUPPORTED EXCEPTION caught');
  WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('EXCEPTION CAUGHT');
END;
/

getAttribute( )

Format

getAttribute(ctx IN OUT RAW,

name IN VARCHAR2)

RETURN VARCHAR2;

Description

Returns the value of the requested attribute from video data for user-defined formats only.

Note:

This method is supported only for user-defined format plug-ins.

Parameters

ctx: The format plug-in context information.
name: The name of the attribute.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the getAttribute( ) method and the video plug-in raises an exception when calling this method.

See Appendix G for more information about these exceptions.

Examples

Return information for the specified video attribute for video data stored in the database. (Because this example uses a supported data format, rather than a user-written plug-in, an exception will be raised.)

DECLARE
 obj ORDSYS.ORDVideo;
 res VARCHAR2(4000);
 ctx RAW(64) :=NULL;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 DBMS_OUTPUT.PUT_LINE('getting video duration');
 DBMS_OUTPUT.PUT_LINE('---------------------');
 res := obj.getAttribute(ctx,'video_duration');
 COMMIT;
 EXCEPTION
  WHEN ORDSYS.ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION THEN
   DBMS_OUTPUT.PUT_LINE('VIDEO PLUGIN EXCEPTION caught');
  WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('EXCEPTION caught');
END;
/

getBitRate( )

Format

getBitRate( ) RETURN INTEGER;

Description

Returns the value of the bitRate attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getBitRate, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the object attribute value of the bitRate attribute of the video object:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getBitRate();
 DBMS_OUTPUT.PUT_LINE('bit rate : ' || res );
 COMMIT;
END;
/

getCompressionType( )

Format

getCompressionType( ) RETURN VARCHAR2;

Description

Returns the value of the compressionType attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getCompressionType, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the object attribute value of the compressionType attribute of the video object:

DECLARE
 obj ORDSYS.ORDVideo;
 res VARCHAR2(4000);
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getCompressionType();
 DBMS_OUTPUT.PUT_LINE('compression type: ' ||res);
 COMMIT;
END;
/

getContentInLob( )

Format

getContentInLob(ctx IN OUT RAW,

dest_lob IN OUT NOCOPY BLOB,

mimeType OUT VARCHAR2,

format OUT VARCHAR2);

Description

Copies data from a data source into the specified BLOB. The BLOB must not be the BLOB in the source.localData attribute (of the embedded ORDSource object).

Parameters

ctx: The source plug-in context information.
dest_lob: The LOB in which to receive data.
mimeType: The MIME type of the data; this may or may not be returned.
format: The format of the data; this may or may not be returned.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the getContentInLob( ) method and this method is not supported by the source plug-in being used.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Get data from a data source into the specified BLOB on the local source:

DECLARE
 obj ORDSYS.ORDVideo;
 tempBLob BLOB;
 mimeType VARCHAR2(4000);
 format VARCHAR2(31);
 ctx RAW(64) :=NULL;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 IF (obj.isLocal) THEN
  DBMS_OUTPUT.PUT_LINE('local is true');
 END IF;
 DBMS_LOB.CREATETEMPORARY(tempBLob, true, 10);
 obj.getContentInLob(ctx,tempBLob, mimeType,format);
 DBMS_OUTPUT.PUT_LINE('Length is ' ||TO_CHAR(DBMS_LOB.getLength(tempBLob)));
 COMMIT;
 EXCEPTION
  WHEN ORDSYS.ORDSourceExceptions.METHOD_NOT_SUPPORTED THEN
   DBMS_OUTPUT.PUT_LINE('ORDSourceExceptions.METHOD_NOT_SUPPORTED caught');
  WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('EXCEPTION caught');
END;
/

getContentLength( )

Format

getContentLength(ctx IN OUT RAW) RETURN INTEGER;

Description

Returns the length of the video data content stored in the source.

Parameters

ctx: The source plug-in context information.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getContentLength, WNDS, WNPS, RNDS, RNPS)

Exceptions

ORDSourceExceptions.INCOMPLETE_SOURCE_INFORMATION

This exception is raised if you call the getContentLength( ) method and the value of source.srcType attribute is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in import( ).

getDescription( )

Format

getDescription( ) RETURN VARCHAR2;

Description

Returns the description of the video data.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getDescription, WNDS, WNPS, RNDS, RNPS)

Exceptions

ORDVideoExceptions.DESCRIPTION_IS_NOT_SET

This exception is raised if you call the getDescription( ) method and the description attribute is not set.

See Appendix G for more information about this exception.

Examples

See the example in setDescription( ).

getFormat( )

Format

getFormat( ) RETURN VARCHAR2;

Description

Returns the value of the format attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getFormat, WNDS, WNPS, RNDS, RNPS)

Exceptions

ORDVideoExceptions.VIDEO_FORMAT_IS_NULL

This exception is raised if you call the getFormat( ) method and the value for the format attribute is NULL.

See Appendix G for more information about this exception.

Examples

Get the format for some stored video data:

DECLARE
 obj ORDSYS.ORDVideo;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 DBMS_OUTPUT.PUT_LINE('writing format');
 DBMS_OUTPUT.PUT_LINE('--------------');
 DBMS_OUTPUT.PUT_LINE(obj.getFormat);
 COMMIT;
END;
/

getFrameRate( )

Format

getFrameRate( ) RETURN INTEGER;

Description

Returns the value of the frameRate attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getFrameRate, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the object attribute value of the frame rate for video data stored in the database:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getFrameRate();
 DBMS_OUTPUT.PUT_LINE('frame rate : ' ||res);
 COMMIT;
END;
/

getFrameResolution( )

Format

getFrameResolution( ) RETURN INTEGER;

Description

Returns the value of the frameResolution attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getFrameResolution, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the value of the frame resolution for the video data:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getFrameResolution();
 DBMS_OUTPUT.PUT_LINE('resolution : ' ||res);
 COMMIT;
END;
/

getFrameSize( )

Format

getFrameSize(retWidth OUT INTEGER,

retHeight OUT INTEGER);

Description

Returns the value of the height and width attributes of the video object.

Parameters

retWidth: The frame width in pixels.
retHeight: The frame height in pixels.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getFrameSize, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the frame size (width and height) for video data:

DECLARE
 obj ORDSYS.ORDVideo;
 width INTEGER;
 height INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 obj.getFrameSize(width, height);
 DBMS_OUTPUT.PUT_LINE('width :' || width);
 DBMS_OUTPUT.PUT_LINE('height :' || height);
 COMMIT;
END;
/

getNumberOfColors( )

Format

getNumberOfColors( ) RETURN INTEGER;

Description

Returns the value of the numberOfColors attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getNumberOfColors, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the object attribute value of the numberOfColors attribute of the video object:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getNumberOfColors();
 DBMS_OUTPUT.PUT_LINE('number of colors: ' ||res);
 COMMIT;
END;
/

getNumberOfFrames( )

Format

getNumberOfFrames( ) RETURN INTEGER;

Description

Returns the value of the numberOfFrames attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getNumberOfFrames, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the object attribute value of the total number of frames in the video data:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getNumberOfFrames();
 DBMS_OUTPUT.PUT_LINE('number of frames : ' ||res);
 COMMIT;
END;
/

getVideoDuration( )

Format

getVideoDuration( ) RETURN INTEGER;

Description

Returns the value of the videoDuration attribute of the video object.

Parameters

None.

Usage Notes

None.

Pragmas

PRAGMA RESTRICT_REFERENCES(getVideoDuration, WNDS, WNPS, RNDS, RNPS)

Exceptions

None.

Examples

Return the total time to play the video data:

DECLARE
 obj ORDSYS.ORDVideo;
 res INTEGER;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p 
  WHERE p.product_id  = 2030;
 res := obj.getVideoDuration();
 DBMS_OUTPUT.PUT_LINE('video duration : ' ||res);
 COMMIT;
END;
/

import( )

Format

import(ctx IN OUT RAW);

Description

Transfers video data from an external video data source to a local source (localData) within Oracle Database.

Parameters

ctx: The source plug-in context information. This should be allocated and initialized to NULL. If you are using a user-defined source plug-in, you should call the openSource( ) method. See the introduction to this chapter for more information.

Usage Notes

Use the setSource( ) method to set the source.srcType, source.srcLocation, and source.srcName attributes (of the embedded ORDSource object) for the external video data source prior to calling the import( ) method.

After importing data from an external video data source to a local source (within Oracle Database), the source information remains unchanged (that is, pointing to the source from where the data was imported).

Invoking this method implicitly calls the setUpdateTime( ) and setLocal( ) methods.

This method is invoked at the ORDSource level, which uses the PL/SQL UTL_HTTP package to import media data from an HTTP data source. You can use environment variables to specify the proxy behavior of the UTL_HTTP package. For example, on UNIX, setting the environment variable http_proxy to a URL specifies that the UTL_HTTP package will use that URL as the proxy server for HTTP requests. Setting the no_proxy environment variable to a domain name specifies that the HTTP proxy server will not be used for URLs in the specified domain.

See Oracle Database PL/SQL Packages and Types Reference for more information about the UTL_HTTP PL/SQL package.

Pragmas

None.

Exceptions

ORDSourceExceptions.INCOMPLETE_SOURCE_INFORMATION

This exception is raised if you call the import( ) method and the value of the source.srcType attribute is NULL.

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the import( ) method and this method is not supported by the source plug-in being used.

ORDSourceExceptions.NULL_SOURCE

This exception is raised if you call the import( ) method and the value of the source.localData attribute is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Import video data by first setting the source and then importing it:

DECLARE
 obj ORDSYS.ORDVideo;
 ctx RAW(64) :=NULL;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p
  WHERE p.product_id = 2030 FOR UPDATE;
 DBMS_OUTPUT.PUT_LINE('setting and getting source');
 DBMS_OUTPUT.PUT_LINE('--------------------------');
 -- Set source to a file:
 obj.setSource('file','FILE_DIR','speakers.rm');
 -- Get source information:
 DBMS_OUTPUT.PUT_LINE(obj.getSource());
 -- Import data:
 obj.import(ctx);
 -- Check size:
 DBMS_OUTPUT.PUT_LINE('Length is ' || TO_CHAR(obj.getContentLength(ctx)));
 UPDATE pm.online_media p SET p.product_video = obj WHERE p.product_id = 2030;
 COMMIT;
END;
/

importFrom( )

Format

importFrom(ctx IN OUT RAW,

source_type IN VARCHAR2,

source_location IN VARCHAR2,

source_name IN VARCHAR2);

Description

Transfers video data from the specified external video data source to a local source (localData) within Oracle Database.

Parameters

ctx: The source plug-in context information. This should be allocated and initialized to NULL. If you are using a user-defined source plug-in, you should call the openSource( ) method. See the introduction to this chapter for more information.
source_type: The type of the source video data.
source_location: The location from which the source video data is to be imported.
source_name: The name of the source video data.

Usage Notes

This method is similar to the import( ) method except the source information is specified as parameters to the method instead of separately.

You must ensure that the directory indicated with the source_location parameter exists or is created before you use this method for srcType "file".

After importing data from an external video data source to a local source (within Oracle Database), the source information (that is, pointing to the source from where the data was imported) is set to the input values.

Invoking this method implicitly calls the setUpdateTime( ) and setLocal( ) methods.

Pragmas

None.

Exceptions

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the importFrom( ) method and this method is not supported by the source plug-in being used.

ORDSourceExceptions.NULL_SOURCE exception

This exception is raised if you call the importFrom( ) method and the value the source.localData attribute is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Import video data from the specified external data source into the local source:

DECLARE
  obj ORDSYS.ORDVideo;
  ctx RAW(64) :=NULL;
BEGIN
  SELECT p.product_video INTO obj FROM pm.online_media p
     WHERE p.product_id = 2004 FOR UPDATE;
  DBMS_OUTPUT.PUT_LINE('setting and getting source');
  DBMS_OUTPUT.PUT_LINE('--------------------------');
  -- Import data:
  obj.importFrom(ctx,'file','FILE_DIR','speakers.rm');
  -- Check size:
  DBMS_OUTPUT.PUT_LINE('Length is ' ||TO_CHAR(obj.getContentLength(ctx)));
  UPDATE pm.online_media p SET p.product_video = obj WHERE p.product_id = 2004;
  COMMIT;
  EXCEPTION
        WHEN ORDSYS.ORDSourceExceptions.METHOD_NOT_SUPPORTED THEN
         DBMS_OUTPUT.put_line('Source METHOD_NOT_SUPPORTED caught');
        WHEN ORDSYS.ORDVideoExceptions.METHOD_NOT_SUPPORTED THEN
         DBMS_OUTPUT.put_line('VIDEO METHOD_NOT_SUPPORTED EXCEPTION caught');
        WHEN ORDSYS.ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION THEN
         DBMS_OUTPUT.put_line('VIDEO PLUGIN EXCEPTION caught');
        WHEN OTHERS THEN
         DBMS_OUTPUT.PUT_LINE('EXCEPTION Caught');
END;
/

processVideoCommand( )

Format

processVideoCommand(ctx IN OUT RAW,

cmd IN VARCHAR2,

arguments IN VARCHAR2,

result OUT RAW)

RETURN RAW;

Description

Lets you send a command and related arguments to the format plug-in for processing.

Note:

This method is supported only for user-defined format plug-ins.

Parameters

ctx: The format plug-in context information.
cmd: Any command recognized by the format plug-in.
arguments: The arguments of the command.
result: The result of calling this method returned by the format plug-in.

Usage Notes

Use this method to send any video commands and their respective arguments to the format plug-in. Commands are not interpreted; they are taken and passed through to a format plug-in to be processed.

If the format is set to NULL, then the processVideoCommand( ) method uses the default format plug-in; otherwise, it uses your user-defined format plug-in.

You can extend support to a format that is not understood by the ORDVideo object by preparing an ORDPLUGINS.ORDX_<format>_VIDEO package that supports that format. See Oracle interMedia User's Guide for more information.

Pragmas

None.

Exceptions

ORDVideoExceptions.METHOD_NOT_SUPPORTED

This exception is raised when the video plug-in does not support the method or the plug-in is not found.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the processVideoCommand( ) method and the video plug-in raises an exception.

See Appendix G for more information about these exceptions.

Examples

None.

setBitRate( )

Format

setBitRate(knownBitRate IN INTEGER);

Description

Sets the value of the bitRate attribute of the video object.

Parameters

knownBitRate: The bit rate.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setBitRate( ) method and the value for the knownBitRate parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setCompressionType( )

Format

setCompressionType(knownCompressionType IN VARCHAR2);

Description

Sets the value of the compressionType attribute of the video object.

Parameters

knownCompressionType: A known compression type.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setCompressionType( ) method and the value for the knownCompressionType parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setDescription( )

Format

setDescription (user_description IN VARCHAR2);

Description

Sets the description of the video data.

Parameters

user_description: The description of the video data.

Usage Notes

Each video object may need a description to help some client applications. For example, a Web-based client can show a list of video descriptions from which a user can select one to access the video data.

Web access components and other client components provided with Oracle interMedia make use of this description attribute to present video data to users.

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about this exception.

Examples

Set the description attribute for some video data:

DECLARE
 obj ORDSYS.ORDVideo;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p
  WHERE p.product_id = 2030 FOR UPDATE;
 DBMS_OUTPUT.PUT_LINE('writing description');
 DBMS_OUTPUT.PUT_LINE('-------------');
 obj.setDescription('This is a video of a speaker');
 DBMS_OUTPUT.PUT_LINE(obj.getDescription());
 UPDATE pm.online_media p SET p.product_video = obj WHERE p.product_id = 2688;
 COMMIT;
END;
/

setFormat( )

Format

setFormat(knownFormat IN VARCHAR2);

Description

Sets the format attribute of the video object.

Parameters

knownFormat: The known format of the video data to be set in the video object.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setFormat( ) method and the value for the knownFormat parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Set the format for some stored video data:

DECLARE
 obj ORDSYS.ORDVideo;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p
  WHERE p.product_id = 2030 FOR UPDATE;
 DBMS_OUTPUT.PUT_LINE('current format');
 DBMS_OUTPUT.PUT_LINE('--------------');
 DBMS_OUTPUT.PUT_LINE(obj.getFormat);
 obj.setFormat('rm');
 DBMS_OUTPUT.PUT_LINE('new format');
 DBMS_OUTPUT.PUT_LINE('--------------');
 DBMS_OUTPUT.PUT_LINE(obj.getFormat);
  UPDATE pm.online_media p SET p.product_video = obj 
    WHERE p.product_id = 2030;
 COMMIT;
 EXCEPTION
  WHEN ORDSYS.ORDVideoExceptions.NULL_INPUT_VALUE THEN
   DBMS_OUTPUT.PUT_LINE('ORDVideoExceptions.NULL_INPUT_VALUE caught');
  WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('EXCEPTION caught');
 END;
 /

setFrameRate( )

Format

setFrameRate(knownFrameRate IN INTEGER);

Description

Sets the value of the frameRate attribute of the video object.

Parameters

knownFrameRate: The frame rate.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setFrameRate( ) method and the value for the knownFrameRate parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setFrameResolution( )

Format

setFrameResolution(knownFrameResolution IN INTEGER);

Description

Sets the value of the frameResolution attribute of the video object.

Parameters

knownFrameResolution: The known frame resolution in pixels per inch.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setFrameResolution( ) method and the value for the knownFrameResolution parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setFrameSize( )

Format

setFrameSize(knownWidth IN INTEGER,

knownHeight IN INTEGER);

Description

Sets the value of the height and width attributes of the video object.

Parameters

knownWidth: The frame width in pixels.
knownHeight: The frame height in pixels.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setFrameSize( ) method and the value for either the knownWidth or knownHeight parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

Set the frame size (width and height) for video data:

DECLARE
 obj ORDSYS.ORDVideo;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p
   WHERE p.product_id = 2030 FOR UPDATE;
 obj.setFrameSize(1,2);
 obj.setFrameResolution(4);
 obj.setFrameRate(5);
 obj.setVideoDuration(20);
 obj.setNumberOfFrames(8);
 obj.setCompressionType('Cinepak');
 obj.setBitRate(1500);
 obj.setNumberOfColors(256);
 UPDATE pm.online_media p SET p.product_video = obj WHERE p.product_id = 2030;
 COMMIT;
END;
/

setKnownAttributes( )

Format

setKnownAttributes(knownFormat IN VARCHAR2,

knownWidth IN INTEGER,

knownHeight IN INTEGER,

knownFrameResolution IN INTEGER,

knownFrameRate IN INTEGER,

knownVideoDuration IN INTEGER,

knownNumberOfFrames IN INTEGER,

knownCompressionType IN VARCHAR2,

knownNumberOfColors IN INTEGER,

knownBitRate IN INTEGER);

Description

Sets the known video attributes for the video data.

Parameters

knownFormat: The known format.
knownWidth: The known width.
knownHeight: The known height.
knownFrameResolution: The known frame resolution.
knownFrameRate: The known frame rate.
knownVideoDuration: The known video duration.
knownNumberOfFrames: The known number of frames.
knownCompressionType: The known compression type.
knownNumberOfColors: The known number of colors.
knownBitRate: The known bit rate.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about this exception.

Examples

Set the property information for all known attributes for video data:

DECLARE
 obj ORDSYS.ORDVideo;
 width integer;
 height integer;
BEGIN
 SELECT p.product_video INTO obj FROM pm.online_media p
  WHERE p.product_id = 2030 FOR UPDATE;
 obj.setKnownAttributes('MOOV',1,2,4,5,20,8,'Cinepak', 256, 1500);
 obj.getFrameSize(width, height);
 DBMS_OUTPUT.PUT_LINE('width: '  || TO_CHAR(width));
 DBMS_OUTPUT.PUT_LINE('height: ' || TO_CHAR(height));
 DBMS_OUTPUT.PUT_LINE('format: ' || obj.getFormat());
 DBMS_OUTPUT.PUT_LINE('frame resolution: ' || TO_CHAR(obj.getFrameResolution()));
 DBMS_OUTPUT.PUT_LINE('frame rate: ' || TO_CHAR(obj.getFrameRate()));
 DBMS_OUTPUT.PUT_LINE('video duration: ' || TO_CHAR(obj.getVideoDuration()));
 DBMS_OUTPUT.PUT_LINE('number of frames: ' || TO_CHAR(obj.getNumberOfFrames()));
 DBMS_OUTPUT.PUT_LINE('compression type: ' || obj.getCompressionType());
 DBMS_OUTPUT.PUT_LINE('bite rate: ' || TO_CHAR(obj.getBitRate()));
 DBMS_OUTPUT.PUT_LINE('number of colors: ' || TO_CHAR(obj.getNumberOfColors()));
 UPDATE pm.online_media p SET p.product_video = obj 
   WHERE p.product_id = 2030;
 COMMIT;
END;
/

setNumberOfColors( )

Format

setNumberOfColors(knownNumberOfColors IN INTEGER);

Description

Sets the value of the numberOfColors attribute of the video object.

Parameters

knownNumberOfColors: A known number of colors.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setNumberOfColors( ) method and the value for the knownNumberOfColors parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setNumberOfFrames( )

Format

setNumberOfFrames(knownNumberOfFrames IN INTEGER);

Description

Sets the value of the numberOfFrames attribute of the video object.

Parameters

knownNumberOfFrames: A known number of frames.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setNumberOfFrames( ) method and the value for the knownNumberOfFrames parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).

setProperties( )

Format

setProperties(ctx IN OUT RAW,

setComments IN BOOLEAN);

Description

Reads the video data to get the values of the object attributes and then stores them in the object. This method sets the properties for each of the following attributes of the video data for which values are available: format, height, width, frame resolution, frame rate, video duration, number of frames, compression type, number of colors, and bit rate. This method populates the comments field of the object with a rich set of format and application properties in XML form if the value of the setComments parameter is TRUE.

Parameters

ctx: The format plug-in context information.
setComments: A Boolean value that indicates whether or not the comments field of the object is populated. If the value is TRUE, then the comments field of the object is populated with a rich set of format and application properties of the video object in XML form; otherwise, if the value is FALSE, the comments field of the object remains unpopulated. The default value is FALSE.

Usage Notes

If the property cannot be extracted from the media source, then the respective attribute is set to NULL.

If the format is set to NULL, then the setProperties( ) method uses the default format plug-in; otherwise, it uses your user-defined format plug-in.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the setProperties( ) method and the video plug-in raises an exception when calling this method.

See Appendix G for more information about these exceptions.

Examples

Set the property information for known video attributes:

DECLARE
  obj ORDSYS.ORDVideo;
  ctx RAW(64) :=NULL;
BEGIN
  SELECT p.product_video INTO obj FROM pm.online_media p 
    WHERE p.product_id  = 2030 FOR UPDATE;
  obj.setProperties(ctx,FALSE);
  UPDATE pm.online_media p SET p.product_video = obj 
    WHERE p.product_id = 2030;
  COMMIT;
  EXCEPTION
   WHEN ORDSYS.ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION THEN
    DBMS_OUTPUT.PUT_LINE('ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION caught');
   WHEN OTHERS THEN
    DBMS_OUTPUT.PUT_LINE('exception raised');
END;
/

setVideoDuration( )

Format

setVideoDuration(knownVideoDuration IN INTEGER);

Description

Sets the value of the videoDuration attribute of the video object.

Parameters

knownVideoDuration: A known video duration.

Usage Notes

Calling this method implicitly calls the setUpdateTime( ) method.

Pragmas

None.

Exceptions

ORDVideoExceptions.NULL_INPUT_VALUE

This exception is raised if you call the setVideoDuration( ) method and the value for the knownVideoDuration parameter is NULL.

ORDVideoExceptions.NULL_SOURCE

This exception is raised when the value of the ORDVideo.source attribute is NULL.

See Appendix G for more information about these exceptions.

Examples

See the example in setFrameSize( ).