# Mp4TimestampData

Artifact: [androidx.media3:media3-container](https://developer.android.com/jetpack/androidx/releases/media3) [View Source](https://cs.android.com/search?q=file:androidx/media3/container/Mp4TimestampData.java+class:androidx.media3.container.Mp4TimestampData)

*** ** * ** ***


```
@UnstableApi
public final class Mp4TimestampData implements Metadata.Entry
```

<br />

*** ** * ** ***

Stores MP4 timestamp data.

## Summary

| ### Constants |
|---|---|
| `static final int` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#TIMESCALE_UNSET() = -1` Represents an unset or unknown timescale. |

| ### Public fields |
|---|---|
| `final long` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#creationTimestampSeconds()` The creation timestamp. |
| `final long` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#modificationTimestampSeconds()` The modification timestamp. |
| `final long` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#timescale()` The timescale of the movie. |

| ### Public constructors |
|---|
| `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#Mp4TimestampData(long,long)( long creationTimestampSeconds, long modificationTimestampSeconds )` Creates an instance. |
| `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#Mp4TimestampData(long,long,long)( long creationTimestampSeconds, long modificationTimestampSeconds, long timescale )` Creates an instance. |

| ### Public methods |
|---|---|
| `boolean` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#equals(java.lang.Object)(@https://developer.android.com/reference/androidx/annotation/Nullable https://developer.android.com/reference/java/lang/Object.html obj)` |
| `int` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#hashCode()()` |
| `https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#toString()()` |
| `static long` | `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#unixTimeToMp4TimeSeconds(long)(long unixTimestampMs)` Returns an MP4 timestamp (in seconds since midnight, January 1, 1904) from a Unix epoch timestamp (in milliseconds since midnight, January 1, 1970). |

| ### Inherited methods |
|---|
| From [androidx.media3.common.Metadata.Entry](https://developer.android.com/reference/androidx/media3/common/Metadata.Entry) |---|---| | `@https://developer.android.com/reference/androidx/annotation/Nullable byte[]` | `https://developer.android.com/reference/androidx/media3/common/Metadata.Entry#getWrappedMetadataBytes()()` Returns the bytes of the wrapped metadata in this Entry, or null if it doesn't contain wrapped metadata. | | `@https://developer.android.com/reference/androidx/annotation/Nullable https://developer.android.com/reference/androidx/media3/common/Format` | `https://developer.android.com/reference/androidx/media3/common/Metadata.Entry#getWrappedMetadataFormat()()` Returns the `https://developer.android.com/reference/androidx/media3/common/Format` that can be used to decode the wrapped metadata in `https://developer.android.com/reference/androidx/media3/common/Metadata.Entry#getWrappedMetadataBytes()`, or null if this Entry doesn't contain wrapped metadata. | | `void` | `https://developer.android.com/reference/androidx/media3/common/Metadata.Entry#populateMediaMetadata(androidx.media3.common.MediaMetadata.Builder)(https://developer.android.com/reference/androidx/media3/common/MediaMetadata.Builder builder)` Updates the `https://developer.android.com/reference/androidx/media3/common/MediaMetadata.Builder` with the type-specific values stored in this ` Entry`. | |

## Constants

### TIMESCALE_UNSET

```
public static final int TIMESCALE_UNSET = -1
```

Represents an unset or unknown timescale.

## Public fields

### creationTimestampSeconds

```
public final long creationTimestampSeconds
```

The creation timestamp.

### modificationTimestampSeconds

```
public final long modificationTimestampSeconds
```

The modification timestamp.

### timescale

```
public final long timescale
```

The timescale of the movie.

## Public constructors

### Mp4TimestampData

```
public Mp4TimestampData(
    long creationTimestampSeconds,
    long modificationTimestampSeconds
)
```

Creates an instance.

The `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#timescale()` is set to `https://developer.android.com/reference/androidx/media3/container/Mp4TimestampData#TIMESCALE_UNSET()`.

| Parameters |
|---|---|
| `long creationTimestampSeconds` | The creation time UTC in seconds since midnight, January 1, 1904. |
| `long modificationTimestampSeconds` | The modification time UTC in seconds since midnight, January 1, 1904. |

### Mp4TimestampData

```
public Mp4TimestampData(
    long creationTimestampSeconds,
    long modificationTimestampSeconds,
    long timescale
)
```

Creates an instance.

| Parameters |
|---|---|
| `long creationTimestampSeconds` | The creation time UTC in seconds since midnight, January 1, 1904. |
| `long modificationTimestampSeconds` | The modification time UTC in seconds since midnight, January 1, 1904. |
| `long timescale` | The timescale of the movie. |

## Public methods

### equals

```
public boolean equals(@Nullable Object obj)
```

### hashCode

```
public int hashCode()
```

### toString

```
public String toString()
```

### unixTimeToMp4TimeSeconds

```
public static long unixTimeToMp4TimeSeconds(long unixTimestampMs)
```

Returns an MP4 timestamp (in seconds since midnight, January 1, 1904) from a Unix epoch timestamp (in milliseconds since midnight, January 1, 1970).