# AviExtractor
# AviExtractor
Artifact:[androidx.media3:media3-extractor](https://developer.android.com/jetpack/androidx/releases/media3)
[View Source](https://cs.android.com/search?q=file:androidx/media3/extractor/avi/AviExtractor.java+class:androidx.media3.extractor.avi.AviExtractor)
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/androidx/media3/extractor/avi/AviExtractor "View this page in Java")
```
@UnstableApi
class AviExtractor : Extractor
```
*** ** * ** ***
Extracts data from the AVI container format.
Spec: https://docs.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference.
## Summary
| ### Nested types |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `@`[Documented](https://developer.android.com/reference/java/lang/annotation/Documented.html) `@`[Retention](https://developer.android.com/reference/java/lang/annotation/Retention.html)`(value = `[RetentionPolicy.SOURCE](https://developer.android.com/reference/java/lang/annotation/RetentionPolicy.html#SOURCE)`)` `@`[Target](https://developer.android.com/reference/java/lang/annotation/Target.html)`(value = `[ElementType.TYPE_USE](https://developer.android.com/reference/java/lang/annotation/ElementType.html#TYPE_USE)`)` `@`[IntDef](https://developer.android.com/reference/kotlin/androidx/annotation/IntDef)`(flag = true, value = )` `annotation `[AviExtractor.Flags](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor.Flags) Flags controlling the behavior of the extractor. |
| ### Constants |
|-------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FLAG_EMIT_RAW_SUBTITLE_DATA](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FLAG_EMIT_RAW_SUBTITLE_DATA())` = 1` Flag to use the source subtitle formats without modification. |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_AVI_](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_AVI_())` = 541677121` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_JUNK](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_JUNK())` = 1263424842` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_LIST](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_LIST())` = 1414744396` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_RIFF](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_RIFF())` = 1179011410` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_auds](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_auds())` = 1935963489` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_avih](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_avih())` = 1751742049` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_hdrl](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_hdrl())` = 1819436136` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_idx1](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_idx1())` = 829973609` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_movi](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_movi())` = 1769369453` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_strf](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_strf())` = 1718776947` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_strh](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_strh())` = 1752331379` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_strl](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_strl())` = 1819440243` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_strn](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_strn())` = 1852994675` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_txts](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_txts())` = 1937012852` |
| `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [FOURCC_vids](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#FOURCC_vids())` = 1935960438` |
| ### Public constructors |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ~~[AviExtractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#AviExtractor())~~`()` **This function is deprecated.** Use[AviExtractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#AviExtractor(int,androidx.media3.extractor.text.SubtitleParser.Factory))instead.
|
| [AviExtractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#AviExtractor(int,androidx.media3.extractor.text.SubtitleParser.Factory))`(` ` @`[AviExtractor.Flags](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor.Flags)` extractorFlags: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`,` ` subtitleParserFactory: `[SubtitleParser.Factory](https://developer.android.com/reference/kotlin/androidx/media3/extractor/text/SubtitleParser.Factory)`!` `)` Constructs an instance. |
| ### Public functions |
|-------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [init](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#init(androidx.media3.extractor.ExtractorOutput))`(output: `[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput)`!)` Initializes the extractor with an[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput). |
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))`(input: `[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)`!, seekPosition: `[PositionHolder](https://developer.android.com/reference/kotlin/androidx/media3/extractor/PositionHolder)`!)` Extracts data read from a provided[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput). |
| [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [release](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#release())`()` Releases all kept resources. |
| [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [seek](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#seek(long,long))`(position: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`, timeUs: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Notifies the extractor that a seek has occurred. |
| [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [sniff](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#sniff(androidx.media3.extractor.ExtractorInput))`(input: `[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)`!)` Returns whether this extractor can extract samples from the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput), which must provide data from the start of the stream. |
| ### Inherited Constants |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| From[androidx.media3.extractor.Extractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor) |-------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [RESULT_CONTINUE](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_CONTINUE())` = 0` Returned by[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))if the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)passed to the next[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))is required to provide data continuing from the position in the stream reached by the returning call. | | `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [RESULT_END_OF_INPUT](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_END_OF_INPUT())` = -1` Returned by[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))if the end of the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)was reached. | | `const `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [RESULT_SEEK](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_SEEK())` = 1` Returned by[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))if the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)passed to the next[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))is required to provide data starting from a specified position in the stream. | |
| ### Inherited functions |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| From[androidx.media3.extractor.Extractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor) |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `(`[Mutable](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/-mutable-list/index.html)`)`[List](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/-list/index.html)`<`[SniffFailure](https://developer.android.com/reference/kotlin/androidx/media3/extractor/SniffFailure)`!>!` | [getSniffFailureDetails](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#getSniffFailureDetails())`()` Returns additional details about the last call to[sniff](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#sniff(androidx.media3.extractor.ExtractorInput)). | | [Extractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor)`!` | `@`[SideEffectFree](https://checkerframework.org/api/org/checkerframework/dataflow/qual/SideEffectFree.html) [getUnderlyingImplementation](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#getUnderlyingImplementation())`()` Returns the 'real'`Extractor`implementation if this is a delegating instance, or` this`if this instance does the extraction directly without delegating (the default behaviour). | |
## Constants
### FLAG_EMIT_RAW_SUBTITLE_DATA
```
const val FLAG_EMIT_RAW_SUBTITLE_DATA = 1: Int
```
Flag to use the source subtitle formats without modification. If unset, subtitles will be transcoded to[APPLICATION_MEDIA3_CUES](https://developer.android.com/reference/kotlin/androidx/media3/common/MimeTypes#APPLICATION_MEDIA3_CUES())during extraction.
### FOURCC_AVI_
```
const val FOURCC_AVI_ = 541677121: Int
```
### FOURCC_JUNK
```
const val FOURCC_JUNK = 1263424842: Int
```
### FOURCC_LIST
```
const val FOURCC_LIST = 1414744396: Int
```
### FOURCC_RIFF
```
const val FOURCC_RIFF = 1179011410: Int
```
### FOURCC_auds
```
const val FOURCC_auds = 1935963489: Int
```
### FOURCC_avih
```
const val FOURCC_avih = 1751742049: Int
```
### FOURCC_hdrl
```
const val FOURCC_hdrl = 1819436136: Int
```
### FOURCC_idx1
```
const val FOURCC_idx1 = 829973609: Int
```
### FOURCC_movi
```
const val FOURCC_movi = 1769369453: Int
```
### FOURCC_strf
```
const val FOURCC_strf = 1718776947: Int
```
### FOURCC_strh
```
const val FOURCC_strh = 1752331379: Int
```
### FOURCC_strl
```
const val FOURCC_strl = 1819440243: Int
```
### FOURCC_strn
```
const val FOURCC_strn = 1852994675: Int
```
### FOURCC_txts
```
const val FOURCC_txts = 1937012852: Int
```
### FOURCC_vids
```
const val FOURCC_vids = 1935960438: Int
```
## Public constructors
### AviExtractor
```
[AviExtractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#AviExtractor())()
```
| **This function is deprecated.**
|
Use[AviExtractor](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor#AviExtractor(int,androidx.media3.extractor.text.SubtitleParser.Factory))instead.
### AviExtractor
```
AviExtractor(
@AviExtractor.Flags extractorFlags: Int,
subtitleParserFactory: SubtitleParser.Factory!
)
```
Constructs an instance.
| Parameters |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `@`[AviExtractor.Flags](https://developer.android.com/reference/kotlin/androidx/media3/extractor/avi/AviExtractor.Flags)` extractorFlags: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | Flags that control the extractor's behavior. |
| `subtitleParserFactory: `[SubtitleParser.Factory](https://developer.android.com/reference/kotlin/androidx/media3/extractor/text/SubtitleParser.Factory)`!` | The[SubtitleParser.Factory](https://developer.android.com/reference/kotlin/androidx/media3/extractor/text/SubtitleParser.Factory)for parsing subtitles during extraction. |
## Public functions
### init
```
fun init(output: ExtractorOutput!): Unit
```
Initializes the extractor with an[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput). Called at most once.
| Parameters |
|--------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------|
| `output: `[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput)`!` | An[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput)to receive extracted data. |
### read
```
fun read(input: ExtractorInput!, seekPosition: PositionHolder!): Int
```
Extracts data read from a provided[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput). Must not be called before[init](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#init(androidx.media3.extractor.ExtractorOutput)).
A single call to this method will block until some progress has been made, but will not block for longer than this. Hence each call will consume only a small amount of input data.
In the common case,[RESULT_CONTINUE](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_CONTINUE())is returned to indicate that the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)passed to the next read is required to provide data continuing from the position in the stream reached by the returning call. If the extractor requires data to be provided from a different position, then that position is set in`seekPosition`and[RESULT_SEEK](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_SEEK())is returned. If the extractor reached the end of the data provided by the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput), then[RESULT_END_OF_INPUT](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_END_OF_INPUT())is returned.
When this method throws an[IOException](https://developer.android.com/reference/java/io/IOException.html), extraction may continue by providing an[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)with an unchanged[read position](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput#getPosition())to a subsequent call to this method.
| Parameters |
|------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `input: `[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)`!` | The[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)from which data should be read. |
| `seekPosition: `[PositionHolder](https://developer.android.com/reference/kotlin/androidx/media3/extractor/PositionHolder)`!` | If[RESULT_SEEK](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#RESULT_SEEK())is returned, this holder is updated to hold the position of the required data. |
| Returns |
|-----------------------------------------------------------------------------|------------------------------------------------------|
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | One of the`RESULT_`values defined in this interface. |
| Throws |
|-----------------------------------------------------------------------------------------|---------------------------------------------------------|
| [java.io.IOException](https://developer.android.com/reference/java/io/IOException.html) | If an error occurred reading from or parsing the input. |
### release
```
fun release(): Unit
```
Releases all kept resources.
### seek
```
fun seek(position: Long, timeUs: Long): Unit
```
Notifies the extractor that a seek has occurred.
Following a call to this method, the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)passed to the next invocation of[read](https://developer.android.com/reference/kotlin/androidx/media3/extractor/Extractor#read(androidx.media3.extractor.ExtractorInput,androidx.media3.extractor.PositionHolder))is required to provide data starting from`
position`in the stream. Valid random access positions are the start of the stream and positions that can be obtained from any[SeekMap](https://developer.android.com/reference/kotlin/androidx/media3/extractor/SeekMap)passed to the[ExtractorOutput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorOutput).
| Parameters |
|-------------------------------------------------------------------------------------------|-----------------------------------------------------------------|
| `position: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The byte offset in the stream from which data will be provided. |
| `timeUs: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The seek time in microseconds. |
### sniff
```
fun sniff(input: ExtractorInput!): Boolean
```
Returns whether this extractor can extract samples from the[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput), which must provide data from the start of the stream.
If`true`is returned, the`input`'s reading position may have been modified. Otherwise, only its peek position may have been modified.
| Parameters |
|-----------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------|
| `input: `[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)`!` | The[ExtractorInput](https://developer.android.com/reference/kotlin/androidx/media3/extractor/ExtractorInput)from which data should be peeked/read. |
| Returns |
|-------------------------------------------------------------------------------------|-----------------------------------------------------|
| [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | Whether this extractor can read the provided input. |
| Throws |
|-----------------------------------------------------------------------------------------|----------------------------------------------|
| [java.io.IOException](https://developer.android.com/reference/java/io/IOException.html) | If an error occurred reading from the input. |