LL-Mode and Ad Insertion: Do Ads have to be prepared in Chunked Mode

[haudiobe]

(Live TF 2019/06/14):
Generally no, as the chunking is only done at the ABR encoder for early releasing the content.
Still the Segment (not CMAF chunked) could be delivered using HTTP Transfer Encoding Chunked, but the boundaries of the HTTP chunks are more arbitrary. Likely Chunked transfer is not even needed as the size of the segment is known and you can specify the full HTTP header. Also the bandwidth estimation in the ad slot should work regularly as there is no encoder based throttling.

[haudiobe]

(2019-08-02 Live TF): We need to make sure that the client is aware of the change. No explicit signaling is necessary, but we need client implementation guidelines to be aware when this switch happens.

Another way would be to deliver the ad in HTTP chunked mode but this is a complex operation for an ad proxy. So it may be unnecessarily complex.