JIT m3u8 generation

The m3u8 file for live HDS stream is created when the HDS stream is published to the Origin Server (PUSH). The m3u8 is generated incrementally and also serialized on disk to ensure the consistent sequence numbering if Origin Server is restarted.

In this case, theDVR window of the generated live m3u8 = (DVR window of HDS/2) - Target Duration. The target duration of VOD m3u8 is set as the duration of the longest fragment.

The target duration of the live -m3u8 is determined as follows:

• If the bootstrapInfo element of the f4m contains the fragmentDuration attribute, then the Target Duration is considered as (2.1 * fragmentDuration).
• If the bootstrapInfo element does not have the fragmentDuration attribute, the targetDuration element is looked up. The targetDuration element is expected as a child element under the manifest element and should contain the target duration in fractional seconds. If this element is present, its value is used as the Target Duration.