v0.3.5

v0.3.5

A restream-focused fix release. If you use -serve or -worker, upgrade —
several failures reported against v0.3.4 are fixed here.

Fixed

• DASH restream of a VOD now starts immediately. A still-downloading VOD was
  served as a dynamic MPD whose segment availability is gated by wall-clock time,
  but m314dl spools the asset far faster than real time, so a compliant player
  saw the already-downloaded segments as "not yet available" and never started.
  The manifest's availabilityStartTime is now back-dated so every spooled
  segment is immediately playable and seekable (and it still finalizes to a
  static, fully-seekable MPD on completion).

• Restream no longer runs the machine out of memory on a large VOD. Segments
  were spooled under the system temp dir, which is tmpfs (RAM) on most Linux
  hosts — so a big asset (e.g. a long 4K stream) filled memory and was
  OOM-killed. Spooling now goes to real disk by default (the current working
  directory), with a new -spool-dir <path> flag to choose the location and
  a warning if the chosen directory is RAM-backed.

• Multi-trun fragments decrypt correctly. A fragment whose traf carried
  more than one trun kept only the last run's sample map while the encryption
  info covered all samples, decrypting the rest to garbage. Single-trun
  fragments (the common case) are unchanged and remain byte-exact against the
  reference tools.

• Trick-play tracks are no longer offered as normal video. DASH trick-mode
  (I-frame-only) representations marked with the DASH-IF EssentialProperty are
  now excluded from selection instead of appearing as ordinary renditions.

Notes

Decryption still requires you to supply the content key; the tool performs no
license/CDM handshake. In -worker/-serve on a host where /tmp is tmpfs,
point -spool-dir at a real-disk path for large VODs (the default already does
the right thing).