Creating New Adaptive Groups
To Create a New Adaptive Group:
- In the Zixi Broadcaster administrative screen, click the Adaptive tab.
- Click Add Group. The Adaptive live streams group window is displayed.
- In the Group Name field, enter the unique string as the adaptive group's name.
- Under StreamID, select a stream from the drop-down list to create an adaptive bitrate.
- Enter the desired Bitrate[kbps] for that stream in the adjacent field to Stream ID.
- Click
to add as many streams as you want to include in the group and repeat steps 4 and 5 for every stream that is added to the group. - Select one or more Protocols with that will be supported for this adaptive group. The Zixi protocol option enables devices using the Zixi SDK to view the stream using the Zixi protocol.
- Select Support MultiAudio if the input streams include multiple audio channels to enable multiple separate audio channels in the adaptive group.
- Specify the HLS/Dash segment/chunk duration and count (See details in the table below).
- Specify the duration to Keep recorded files for [minutes]. If the file is left as blank, the system will use the global settings specified in the Settings > Live Protocols screen in the HLS DVR Maximum Recording Duration field.
- In the File name template field, specify the file name pattern that Zixi will use to generate when saving the recorded content.
- Click OK.
The new Adaptive Group is created and appears on the Adaptive screen.
Parameter | Description |
|---|---|
Group Name | Specifies the unique identifier for this group. |
Stream ID | Select an input stream from the drop-down list. |
Bitrate [kbps] | Specify the bitrate for the selected stream. |
| Protocols | Select one or more Protocols that will be supported for this adaptive group - Zixi HLS (enables devices using the Zixi SDK to view the stream using the Zixi protocol), HLS, CMAF (DASH + fMP4) |
| Support MultiAudio | Select this checkbox to enable multiple separate audio channels in the adaptive group. |
| HLS Over Multicast | Select this checkbox to enable multicasting of the adaptive stream (requires multicast to be enabled in the Settings) |
| Fast playback | Select this setting to enable low latency HLS delivery. The Enable HLS Fast playback on the Settings > Live Protocols screen must be enabled. Only the TS segments version of the HLS stream will be available for adaptive streaming, not the fragmented MP4 (fMP4) version. When enabled, the following playback URLs will be available:
|
| Convert CEA-708 to WebVTT | Extracts closed caption from video elementary stream and converts it to WebVTT format. This feature is currently available for HLS only and there is no support to styling/placement, just text. |
| HLS Segment Duration [sec] | Specify the duration in seconds of each segment/chunk in the HLS playlist. You can specify sub-second durations (e.g. 0.5). (Default: 6 seconds) |
| HLS Segments Count | Specify the number of segments in the HLS playlist. |
| DASH Segment Duration [sec] | Specify the duration in seconds of each segment/chunk in the DASH adaptive group. You can specify sub-second durations (e.g. 0.5). (Default: 6 seconds) |
| DASH Segments Count | Specify the number of segments in the DASH adaptive group. |
| Recording | |
Keep recorded files for [minutes] | Specifies the maximum time for storing the recording. If the file is left as blank, the system will use the global settings specified in the Settings > Live Protocols screen in the HLS DVR Maximum Recording Duration field. |
| File name template | Specify the file name pattern that Zixi will use to generate when saving the recorded content. A separate file will be generated for each recording up to the time specified in the Max recorded file duration parameter (see above). After this duration a new file will be generated. The file name pattern can include any string and up to three variables listed below. Only the %T=HH.MM.SS Timestamp is mandatory. You can change the order of these variables and add text as long as you maintain the legitimate structure of the file in Linux and Windows: %G = Group Name – optional %N = Sequence Number – optional %T=HH.MM.SS Timestamp - mandatory |