# MediaTrack
Start from base library version 2.9.0. Please remaining backward compatible.
Can be passed MediaContainer.extractDataSource Return.
MediaTrack Audio or video tracks, which can be manipulated
# attribute
# string kind
Track type, read-only
kind Legal value
| value | Introductions | Minimum version |
|---|---|---|
| audio | Audio track | |
| video | Video track |
# number duration
Track length, read-only
# number volume
Volume, Audio Track Valid, Writable