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# uni.createMediaContainer()
Create an audio and video processing container, and finally combine the tracks in the container into a video and return a MediaContainer object
Platform Difference Description
| App | H5 | 微信小程序 | 支付宝小程序 | 百度小程序 | 抖音小程序、飞书小程序 | QQ小程序 | 快手小程序 | 京东小程序 | 元服务 | 小红书小程序 |
|---|---|---|---|---|---|---|---|---|---|---|
| x | x | 2.9.0+ | x | x | x | x | x | x | x | x |
# MediaContainer.addTrack(track)
Add an audio or video track to a container
Parameter Description
| Parameters | Description |
|---|---|
| track | Audio or video track to add |
# MediaContainer.destroy()
Destroy the container and release resources
# MediaContainer.export()
Merge the tracks inside the container and export the video file
# MediaContainer.extractDataSource(object)
Merge the tracks in the container and export the video file, returning a MediaTrack object
Parameter Description
| Attribute | Type | Required | Description |
|---|---|---|---|
| source | String | Yes | Video source address, only supports local files |
# MediaContainer.removeTrack(track)
Add an audio or video track to a container
Parameter Description
| Parameters | Description |
|---|---|
| track | Audio or video track to remove |
# MediaTrack
Returned by MediaContainer.extractDataSource.
MediaTrack audio or video track, you can perform some operations on the track
Parameter Description
| property | type | description |
|---|---|---|
| kind | String | track type, read only ,audio:audio track;video:video track |
| duration | Number | 轨道长度，只读 |
| volume | Number | 音量，音频轨道下有效，可写 |