For the next step please check our Storm JavaScript Library Storage Settings guide where you’ll learn about how to configure storage options.
Quality Settings - Storm JavaScript Library
In this guide, you will get to know all the configuration options for controlling quality in the library.
Sample Code
const streamConfig = {
stream: {
... // stream configuration
},
settings: {
... // basic configuration
quality: {
controlMode: "RESOLUTION_AWARE",
initialUpgradeTimeout: 30,
maxUpgradeTimeout: 3600
}
}
};
Description of Fields and Parameters
| Parameter name | Parameter type | Required | Default | Description |
|---|---|---|---|---|
| controlMode | string | No | "RESOLUTION_AWARE" | This is a quality control mode. Each mode selects the stream quality differently based on the available parameters. A full list of available modes along with their descriptions can be found below. |
| initialUpgradeTimeout | number | No | 30 | This parameter defines the time interval (in seconds) between successive attempts to change the quality. |
| maxUpgradeTimeout | number | No | 3600 | This parameter defines the maximum time interval (in seconds) allowed between quality change attempts. |
Table 1. Quality Configuration Table.
Quality Control Modes
| Mode name | Description |
|---|---|
| RESOLUTION_AWARE | The quality will be selected based on the dimensions of the library window and the available video qualities. The substream offering the resolution closest to those dimensions will be selected as the primary one. |
| PASSIVE | The quality will be selected based on previously saved preferences determined by the RESOLUTION_AWARE mode. If the library was previously initialized in RESOLUTION_AWARE mode, the quality preferences will be stored and this mode will restore them without re-running the analysis. This mode is well-suited for use with a thumbnail that can later be replaced by a fully-featured player. |
| HIGHEST_QUALITY | The substream offering the highest quality (resolution) will always be selected as the primary one. |
| LOWEST_QUALITY | The substream offering the lowest quality (resolution) will always be selected as the primary one. |
Table 2. Quality Control Modes Table.
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