[theora] NHW Project - speed comparison with x265
fboehm at aon.at
Thu Nov 30 10:58:08 UTC 2017
since quite a while I'm reading your updates on your NHW project with
I have to admit I'm no video codec developer. My interest in video
codecs is pretty simple. Several years ago I was working on a
(non-commercial) video streaming project that I wanted to base on an
open-source video codec. Those I was constantly scouting for open source
video codec innovations.
I appreciate your enthusiastic work on such a complex project like
writing a video codec. As you already realized it's similarly
challenging to attract other people to join or use a new video codec.
What I unfortunately can say for sure is, that it's almost impossible to
attract mobile/semiconductor industry to embed such a codec into their
chipsets. Instead you have to find some other (maybe niche) use-case
where your codec works well and can blossom. As an example, maybe some
sort of decentralized/peer-to-peer Internet enthusiasts would enojy
using your codecto develop some sort of open-source alternative to Skype.
To make a long story short: to gain more publicity you really have to
create a website with visual presentations of your codecs quality. And
please, please, please present your results in an appealing way. In the
And of course it would be great if Xiph could host your demo website.
All the best,
Am 2017-11-27 um 20:33 schrieb Raphael Canut:
> I am very slowly working on the NHW Project.I recently made a speed
> comparison with x265 and wanted to share it with you.
> On my processor Intel Core i5-6400, in average the NHW encoder (totally
> unoptimized) is x10 times faster to encode than x265 (png decoding time
> removed), in average 30ms vs 300ms for a 512x512 24bit color image, and
> in average the NHW decoder (totally unoptimized) is x3 times faster to
> decode than x265 (output to .ppm file), in average 10ms vs 30ms.
> As a reminder, x265 is ultra optimized, so with good C optimization,
> SIMD optimization and multithreading, the NHW codec will be x40 times
> faster to encode and x12 times faster to decode than x265 or even more,
> so this confirms that the NHW Project could be a good candidate for the
> mobile device market.
> At mid-compression, quality-wise I find (visual tests) that the NHW
> codec and x265 are on par, sometimes more neatness is better, sometimes
> more precision is better, and a lot of improvements remain to be done
> for the NHW codec.
> If there are engineers from mobile device companies on this forum, could
> you consider the NHW Project or is it too late it will be AOM AV1 or
> HEVC despite their high power consumption?
> Monty, would it be possible that the NHW Project has a Xiph.org page to
> encourage and boost its development?
> Any answer welcome!
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