[x264-devel] x264 Development Newsletter: Vol. 28

[aviad rozenhek]

On Wed, Apr 4, 2012 at 20:30, Jason Garrett-Glaser <jason at x264.com> wrote:

> > its been a month since your last x264 development newsletter, the mailing
> > list hardly contains information regarding future and current
> developments
> > anymore ... :-(
>
> That's because discussion has pretty much always been on #x264dev IRC, not
> here.
>
> > would you entertain a few questions to spark discussion?
> >
> > 1. is x264 likely to (significantly) improve in terms of bits/quality
> > efficiency?
>
> If someone comes up with good enough new ideas!  But it's a lot harder
> than it used to be and a lot of the improvements in the pipeline are
> not so general-purpose (e.g. OpenCL lookahead).
>

> > 2. is x264 likely to get (noticeably) faster for existing intel desktop
> > processors like Bloomfield or Lynnfield?
>
> Unlikely, but I said that before Loren optimized trellis too.
>

does the integration of the GPU into the CPU itself, like in AMD's APUs or
Intel's HD3000 make it more feasible to offload parts of the encode to the
GPU?


>
> > 3. adaptive bitrate has become very important, and with it, synchronized
> > GOPs across encodes in different bitrates.
> > this is currently supported in x264 by using fixed sized GOPs. what are
> your
> > thoughts regarding a more content-aware approach?
>
> x264 supports this with adaptive GOP too; all encodes with the same
> lookahead settings and the same source will give the same distribution
> of frame types, no matter what the bitrate.
>

that's very interesting, I didn't know that.
I guess it only works when encoding to the same resolution, though ...
would it make sense to encode to one resolution [lets call it the master
resolution] using adaptive GOP settings, and then encode all other
bitrates/resolutions using the GOP boundaries of the master resolution?



>
> > 4. what are you thoughts regarding the upcoming HEVC/H265 standard, and
> will
> > there be an x265?
>
> I don't know, are you offering to write one? =P
>

if wishes were horses ;-)


>
> Jason
> _______________________________________________
> x264-devel mailing list
> x264-devel at videolan.org
> http://mailman.videolan.org/listinfo/x264-devel
>



-- 
Aviad Rozenhek
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