8.12. * You SHOULD provide at least 15 minutes of content in a live (linear) playlist.
ほう? なんで?l
8.11. You MUST provide at least six segments in a live (linear) playlist.
ほほう
Media Segmentationについて
Target durations SHOULD be 6 seconds.
ほほん
Media data SHOULD NOT be delivered to the application through a local server.
なんで?
If multiple video streams are provided (H.264, HEVC, HDR), each stream SHOULD provide all anticipated bandwidths. Clients SHOULD NOT be required to switch codecs.
あー、はいはい
Frame rates above 60 fps SHALL NOT be used.
ほうほう
Key frames (IDRs) SHOULD be present every two seconds.
これもおもしろいな。なるほど。
For backward compatibility, some video content SHOULD be encoded with H.264.
あ、でもやっぱり
ああ。読み違えてた。
HLSの"Video encoding requirements"
For maximum compatibility, some H.264 variants SHOULD be less than or equal to High Profile, Level 4.1.
そうなのね!!! (まあそうよね)