IT. Expert System.

Android Reference

MediaFormat

android.media

Class MediaFormat

java.lang.Object
- android.media.MediaFormat

public final class MediaFormat
extends Object

Encapsulates the information describing the format of media data, be it audio or video. The format of the media data is specified as string/value pairs. Keys common to all formats:

Name	Value Type	Description
`KEY_MIME`	String	The type of the format.
`KEY_MAX_INPUT_SIZE`	Integer	optional, maximum size of a buffer of input data
`KEY_BIT_RATE`	Integer	encoder-only, desired bitrate in bits/second

Video formats have the following keys:

Name	Value Type	Description
`KEY_WIDTH`	Integer
`KEY_HEIGHT`	Integer
`KEY_COLOR_FORMAT`	Integer	encoder-only
`KEY_FRAME_RATE`	Integer or Float	encoder-only
`KEY_I_FRAME_INTERVAL`	Integer	encoder-only

Audio formats have the following keys:

Name	Value Type	Description
`KEY_CHANNEL_COUNT`	Integer
`KEY_SAMPLE_RATE`	Integer
`KEY_IS_ADTS`	Integer	optional, if content is AAC audio, setting this key to 1 indicates that each audio frame is prefixed by the ADTS header.
`KEY_AAC_PROFILE`	Integer	encoder-only, optional, if content is AAC audio, specifies the desired profile.
`KEY_CHANNEL_MASK`	Integer	A mask of audio channel assignments
`KEY_FLAC_COMPRESSION_LEVEL`	Integer	encoder-only, optional, if content is FLAC audio, specifies the desired compression level.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`KEY_AAC_PROFILE` A key describing the AAC profile to be used (AAC audio formats only).
`static String`	`KEY_BIT_RATE` A key describing the bitrate in bits/sec.
`static String`	`KEY_CHANNEL_COUNT` A key describing the number of channels in an audio format.
`static String`	`KEY_CHANNEL_MASK` A key describing the channel composition of audio content.
`static String`	`KEY_COLOR_FORMAT` A key describing the color format of the content in a video format.
`static String`	`KEY_DURATION` A key describing the duration (in microseconds) of the content.
`static String`	`KEY_FLAC_COMPRESSION_LEVEL` A key describing the FLAC compression level to be used (FLAC audio format only).
`static String`	`KEY_FRAME_RATE` A key describing the frame rate of a video format in frames/sec.
`static String`	`KEY_HEIGHT` A key describing the height of the content in a video format.
`static String`	`KEY_I_FRAME_INTERVAL` A key describing the frequency of I frames expressed in secs between I frames.
`static String`	`KEY_IS_ADTS` A key mapping to a value of 1 if the content is AAC audio and audio frames are prefixed with an ADTS header.
`static String`	`KEY_MAX_INPUT_SIZE` A key describing the maximum size in bytes of a buffer of data described by this MediaFormat.
`static String`	`KEY_MIME` A key describing the mime type of the MediaFormat.
`static String`	`KEY_SAMPLE_RATE` A key describing the sample rate of an audio format.
`static String`	`KEY_SLICE_HEIGHT`
`static String`	`KEY_STRIDE`
`static String`	`KEY_WIDTH` A key describing the width of the content in a video format.

Constructor Summary

Constructors
Constructor and Description

MediaFormat()
Creates an empty MediaFormat

Constructors
Constructor and Description
`MediaFormat()` Creates an empty MediaFormat

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`containsKey(String name)` Returns true iff a key of the given name exists in the format.
`static MediaFormat`	`createAudioFormat(String mime, int sampleRate, int channelCount)` Creates a minimal audio format.
`static MediaFormat`	`createVideoFormat(String mime, int width, int height)` Creates a minimal video format.
`ByteBuffer`	`getByteBuffer(String name)` Returns the value of a ByteBuffer key.
`float`	`getFloat(String name)` Returns the value of a float key.
`int`	`getInteger(String name)` Returns the value of an integer key.
`long`	`getLong(String name)` Returns the value of a long key.
`String`	`getString(String name)` Returns the value of a string key.
`void`	`setByteBuffer(String name, ByteBuffer bytes)` Sets the value of a ByteBuffer key.
`void`	`setFloat(String name, float value)` Sets the value of a float key.
`void`	`setInteger(String name, int value)` Sets the value of an integer key.
`void`	`setLong(String name, long value)` Sets the value of a long key.
`void`	`setString(String name, String value)` Sets the value of a string key.
`String`	`toString()` Returns a string containing a concise, human-readable description of this object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - KEY_MIME
```
public static final String KEY_MIME
```
    A key describing the mime type of the MediaFormat. The associated value is a string.
    
    See Also:
    Constant Field Values
  - KEY_SAMPLE_RATE
```
public static final String KEY_SAMPLE_RATE
```
    A key describing the sample rate of an audio format. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_CHANNEL_COUNT
```
public static final String KEY_CHANNEL_COUNT
```
    A key describing the number of channels in an audio format. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_WIDTH
```
public static final String KEY_WIDTH
```
    A key describing the width of the content in a video format. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_HEIGHT
```
public static final String KEY_HEIGHT
```
    A key describing the height of the content in a video format. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_MAX_INPUT_SIZE
```
public static final String KEY_MAX_INPUT_SIZE
```
    A key describing the maximum size in bytes of a buffer of data described by this MediaFormat. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_BIT_RATE
```
public static final String KEY_BIT_RATE
```
    A key describing the bitrate in bits/sec. The associated value is an integer
    
    See Also:
    Constant Field Values
  - KEY_COLOR_FORMAT
```
public static final String KEY_COLOR_FORMAT
```
    A key describing the color format of the content in a video format. Constants are declared in MediaCodecInfo.CodecCapabilities.
    
    See Also:
    Constant Field Values
  - KEY_FRAME_RATE
```
public static final String KEY_FRAME_RATE
```
    A key describing the frame rate of a video format in frames/sec. The associated value is an integer or a float.
    
    See Also:
    Constant Field Values
  - KEY_I_FRAME_INTERVAL
```
public static final String KEY_I_FRAME_INTERVAL
```
    A key describing the frequency of I frames expressed in secs between I frames. The associated value is an integer.
    
    See Also:
    Constant Field Values
  - KEY_STRIDE
```
public static final String KEY_STRIDE
```
    See Also:
    Constant Field Values
  - KEY_SLICE_HEIGHT
```
public static final String KEY_SLICE_HEIGHT
```
    See Also:
    Constant Field Values
  - KEY_DURATION
```
public static final String KEY_DURATION
```
    A key describing the duration (in microseconds) of the content. The associated value is a long.
    
    See Also:
    Constant Field Values
  - KEY_IS_ADTS
```
public static final String KEY_IS_ADTS
```
    A key mapping to a value of 1 if the content is AAC audio and audio frames are prefixed with an ADTS header. The associated value is an integer (0 or 1).
    
    See Also:
    Constant Field Values
  - KEY_CHANNEL_MASK
```
public static final String KEY_CHANNEL_MASK
```
    A key describing the channel composition of audio content. This mask is composed of bits drawn from channel mask definitions in AudioFormat. The associated value is an integer.
    
    See Also:
    Constant Field Values
  - KEY_AAC_PROFILE
```
public static final String KEY_AAC_PROFILE
```
    A key describing the AAC profile to be used (AAC audio formats only). Constants are declared in MediaCodecInfo.CodecCapabilities.
    
    See Also:
    Constant Field Values
  - KEY_FLAC_COMPRESSION_LEVEL
```
public static final String KEY_FLAC_COMPRESSION_LEVEL
```
    A key describing the FLAC compression level to be used (FLAC audio format only). The associated value is an integer ranging from 0 (fastest, least compression) to 8 (slowest, most compression).
    
    See Also:
    Constant Field Values
- Constructor Detail
  - MediaFormat
```
public MediaFormat()
```
    Creates an empty MediaFormat
- Method Detail
  - containsKey
```
public final boolean containsKey(String name)
```
    Returns true iff a key of the given name exists in the format.
  - getInteger
```
public final int getInteger(String name)
```
    Returns the value of an integer key.
  - getLong
```
public final long getLong(String name)
```
    Returns the value of a long key.
  - getFloat
```
public final float getFloat(String name)
```
    Returns the value of a float key.
  - getString
```
public final String getString(String name)
```
    Returns the value of a string key.
  - getByteBuffer
```
public final ByteBuffer getByteBuffer(String name)
```
    Returns the value of a ByteBuffer key.
  - setInteger
```
public final void setInteger(String name,
              int value)
```
    Sets the value of an integer key.
  - setLong
```
public final void setLong(String name,
           long value)
```
    Sets the value of a long key.
  - setFloat
```
public final void setFloat(String name,
            float value)
```
    Sets the value of a float key.
  - setString
```
public final void setString(String name,
             String value)
```
    Sets the value of a string key.
  - setByteBuffer
```
public final void setByteBuffer(String name,
                 ByteBuffer bytes)
```
    Sets the value of a ByteBuffer key.
  - createAudioFormat
```
public static final MediaFormat createAudioFormat(String mime,
                            int sampleRate,
                            int channelCount)
```
    Creates a minimal audio format.
    
    Parameters:
    mime - The mime type of the content.
    sampleRate - The sampling rate of the content.
    channelCount - The number of audio channels in the content.
  - createVideoFormat
```
public static final MediaFormat createVideoFormat(String mime,
                            int width,
                            int height)
```
    Creates a minimal video format.
    
    Parameters:
    mime - The mime type of the content.
    width - The width of the content (in pixels)
    height - The height of the content (in pixels)
  - toString
```
public String toString()
```
    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
```
   getClass().getName() + '@' + Integer.toHexString(hashCode())
```
    See Writing a useful toString method if you intend implementing your own toString method.
    Overrides:
    
    toString in class Object
    
    Returns:
    a printable representation of this object.

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IT. Expert System.

Android Reference

MediaFormat

Class MediaFormat

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

KEY_MIME

KEY_SAMPLE_RATE

KEY_CHANNEL_COUNT

KEY_WIDTH

KEY_HEIGHT

KEY_MAX_INPUT_SIZE

KEY_BIT_RATE

KEY_COLOR_FORMAT

KEY_FRAME_RATE

KEY_I_FRAME_INTERVAL

KEY_STRIDE

KEY_SLICE_HEIGHT

KEY_DURATION

KEY_IS_ADTS

KEY_CHANNEL_MASK

KEY_AAC_PROFILE

KEY_FLAC_COMPRESSION_LEVEL

Constructor Detail

MediaFormat

Method Detail

containsKey

getInteger

getLong

getFloat

getString

getByteBuffer

setInteger

setLong

setFloat

setString

setByteBuffer

createAudioFormat

createVideoFormat

toString

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary