Runtime environment notes

System properties

**Table 66:** Mobile Media API system properties
String	Description
`microedition.media.version`	If the API is supported, a version of JSR-135 specification is returned. For example: 1.1.
`supports.mixing`	A query for whether audio mixing is supported. The string returned is either "true" or "false". If mixing is supported, the following conditions are true: At least two tones can be played with `Manager.playTone` simultaneously. `Manager.playTone` can be used at the same time when at least one Player is playing back audio. At least two Players can be used to play back audio simultaneously.
`supports.audio.capture`	A query for whether audio capture is supported. The string returned is either "true" or "false".
`supports.video.capture`	A query for whether video capture is supported. The string returned is either "true" or "false".
`supports.recording`	A query for whether recording is supported. The string returned is either "true" or "false".
`audio.encodings`	The string returned specifies the supported capture audio formats. Each format is specified in a special syntax. The formats are delimited by at least one space. For example, "`encoding=audio/wav`".
`video.encodings`	The string returned specifies the supported capture video formats. Each format is specified in a special syntax. The formats are delimited by at least one space. For example, "`encoding=video/3gpp`".
`video.snapshot.encodings`	Supported video snapshot formats for the `getSnapshot` method in `VideoControl`. The string returned specifies the supported capture image formats. Each format is specified in a special syntax. The formats are delimited by at least one space. For example, "`encoding=png`".
`streamable.contents`	Returns formats that can be streamed from an InputStream. Returns null if streamable formats do not exist. No formats support InputStream streaming at the moment.

Security settings

The MMAPI security model implemented in the Java platform for S60 is based on MIDP 2.0 Recommended Security Policy, JTWI 1.0 and MMAPI 1.1 addendum: Multimedia Security v1.0 JSR135.

Permissions are required for recording, network access, and access to local data stores. Permissions are granted based on the following function groups:

**Table 67:** User settings
Function group	Needed for
Network Access	Access to media on http, https and rtsp locators
Multimedia recording	Recording audio and video, video snapshots
Read User Data Access	Access media in local file system
Write User Data Access	Save a recording into local file system

A security dialog is presented to the user if the relevant function group setting does not explicitly deny or permit access to the feature in question. If the required permission is not granted, then a SecurityException is thrown.

Multimedia-specific settings for S60 and Series 40 platforms:

**Table 68:** Default permissions
Function group	Trusted 3rd Party domain	Untrusted domain	Manufacturer domain	Operator domain
Multimedia recording	Default: Ask first time Other settings: Always allowed, Not allowed	Default: Ask every time Other settings: Ask first time, Not allowed	Always allowed	Always allowed