From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Mon, 15 Apr 2019 07:33:36 +0000 (+0200)
Subject: Keep the HLS backlog even if the stream header changes.
X-Git-Tag: 1.4.3~4
X-Git-Url: https://git.sesse.net/?p=cubemap;a=commitdiff_plain;h=980ac162414c9fce62af4fdb9cfc282865b31572;hp=980ac162414c9fce62af4fdb9cfc282865b31572

Keep the HLS backlog even if the stream header changes.

The typical case here is if we are streaming fMP4 and the encoder
has to restart. The regular (non-HLS) stream has to cut off the
backlog here, but HLS supports multiple headers, so we can add a
discontinuity to keep the backlog seekable.

I haven't actually found a client that will play correctly across
the discontinuity, but hls.js can at least _seek_ across it,
which is already useful.
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