Jamaica posted a picture describing the different modes pretty well:
http://forum.doom9.org/showthread.php?p=1780469#post1780469
I am especially glad to have an imagination of WPP now. And even if Main
profile does not support tiles in conjunction with WPP, higher profiles
may. But so far for a long-term outlook...
Am 12.09.2016, 22:24 Uhr, schrieb Tom Vaughan
<[email protected]>:
Sorry for the short reply. We're at the IBC Show, and it's keeping us on
the run from morning until late at night. I at least wanted to respond
to
the question.
Yes, we're working to implement full support for multiple slices per
frame,
and this will be followed by support for tiles. Things like rate control
have to be readjusted and tuned, and other algorithms may need to be
adjusted, so it may take a number of weeks to fully implement and
optimize.
Multiple slices per frame is not recommend for most encoding
applications.
As you cannot perform inter-prediction across slice boundaries (from
frame
to frame), encoding efficiency is reduced. Multiple slices is mainly
beneficial for low-latency live encoding applications.
Your description of slices and tiles below is basically accurate.
Tom
-----Original Message-----
From: x265-devel [mailto:[email protected]] On Behalf Of
Mario
*LigH* Rohkrämer
Sent: Monday, September 12, 2016 8:54 AM
To: Development for x265
Subject: Re: [x265] Tiles support for x265
Shortest possible reply... :-P
I *guess* the recently introduced implementation of several slices is
already a step towards this even narrower approach.
IIRC, slices already existed in previous video standards (like MPEG 1/2
Video) but were mainly meant to span across the whole width, or at least
a
horizontal sequence of consecutove macroblocks in encoding order. Tiles
are
specifically designed to split the frame into a grid of rectangular
parts,
like a "video wall" is made of a grid of monitors.
Did I imagine correctly so far? ... It might be suitable to explain this
concept a bit in a kind of "outlook" post in a video forum, maybe even in
comparison with WPP (dis- vs. advantages).
Am 10.09.2016, 21:16 Uhr, schrieb Tom Vaughan
<[email protected]>:
Yes.
*From:* x265-devel [mailto:[email protected]] *On Behalf
Of * [email protected]
*Sent:* Saturday, September 10, 2016 2:08 PM
*To:* [email protected]
*Subject:* [x265] Tiles support for x265
Hi!
I just browsed the online docs
(http://x265.readthedocs.io/en/default/)
for
information on how to encode a video using HEVC tiles and couldn't
find anything. Are there any plans to implement this feature in the x265
lib?
I have to encode a video given a specific tiling pattern and doesn't
want to use HM encoder cause it's pretty slow.
Best, Mario
--
Fun and success!
Mario *LigH* Rohkrämer
mailto:[email protected]
_______________________________________________
x265-devel mailing list
[email protected]
https://mailman.videolan.org/listinfo/x265-devel
