h.265 test file to test Kodi 14.0 alpha 2
#1
Hi,

Seems that Kodi 14.0a2 is getting new version of FFmpeg:
http://xbmc.org/kodi-14-0-helix-alpha-2/


Any suggestions where to find a test file to test if my HTPC is capable of decoding files encoded with "h.265 (also known as HEVC) and VP9"?

Also 4K test file encoded with the same codecs?

Thanks.
bat0nas
HW:
AMD APU A6-3600 + Radeon HD 6530D (integrated)
SW: Windows 10 Pro 64bit + Kodi v18.3 "Leia"
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#2
http://www.divx.com/en/hevc-showcase
Right click and save.

Alternatively just encode your own content.
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#3
My 4k trailer conveted to HEVC uses all my CPU and the video from that site uses about %80 of my CPU, are there going to me optimization to the HEVC decoder or a open cl version to my GPU can take the hit not my CPU?
my CPU is a 4770k overclocked to 4.4 Ghz

CPU usage was system not XBMC, my system has about %30 or less for background stuff at the time.
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#4
No doubt the ffmpeg HEVC decoder will get better over time.

There is presently no hardware acceleration solution. The next gen of nvidia gpus (maxwell, but not the early ones) are apparently going to have hevc support, at least thats what Phoronix say.

Are all your cores being used?
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#5
(2014-08-12, 10:32)nickr Wrote: There is presently no hardware acceleration solution. The next gen of nvidia gpus (maxwell, but not the early ones) are apparently going to have hevc support, at least thats what Phoronix say.

Maxwell only has partial hardware acceleration for HEVC, unless something has changed since they announced it at the GPU Technology Conference. This is what anandtech reported from that conference:

Quote:Maxwell’s VP video decode block won’t feature full H.265 (HEVC) support, but NVIDIA is telling us that they will offer partial hardware acceleration, relying on a mix of software and hardware to decode H.265. We had been hoping for full hardware support on Maxwell, but it looks like it’s a bit premature for that in a discrete GPU.

...which is a bit disappointing.
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#6
Yes it's what's known as hybrid mode where some of it is done in hardware and some is in software on the GPU, so CPU load will still be lower than than full CPU software decode but won't be as power efficient as full Hardware GPU decode.

Both Nvidia Maxwell and Intel Broadwell use this hybrid mode for H.265 & VP9, and I would expect any others claiming H.265 support will also be using hybrid mode with full hardware decode not likely to surface until next year. Not that disappointing really as this was to be expected as both Maxwell and Broadwell would have started development long before the H.265 spec's were finalised.
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#7
I have found these HEVC / h265 samples for you guys might want to see what all the fuzz is about:

http://www.elecard.com/en/download/videos.html
http://xhevc.com/en/hevc/encoder/videoShow.jsp
http://www.erightsoft.com/SUPERsnap8d.html
http://vcodex.blogspot.de/2013/04/compar...using.html

MPlayer and Linaro usually also have good sample collection but looks like no HEVC / h265 yet

http://samples.mplayerhq.hu
http://samplemedia.linaro.org
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#8
when I converted a 4k trailer to 265 my PC did it at 1-2 FPS, I was using a beta/alpha version of handbrake. I cant wait to see hardware accelerated 265 will do for streaming like youtube and twitch.
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#9
encoding with x265 is always going to be resource intensive, compared to playback...

if you think about it, same situation with x264 on hardware a few years back...

D.
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#10
Is there any easy automated solution to convert my whole Kodi library to h265? Wont be doing it just yet, but I want to look into the possibility Smile
I am stoked to think that my 8TB HTPC will in theory be able to hold twice as much in the near future Smile
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#11
I'd rather spend a little bit on disk space, then having to playback everything on the CPU instead of accelerated.

I believe HEVC (the name h265 was rejected) will become interesting only when there are hardware decoders available.
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#12
(2014-08-20, 10:19)ziggurat Wrote: Is there any easy automated solution to convert my whole Kodi library to h265? Wont be doing it just yet, but I want to look into the possibility Smile
I am stoked to think that my 8TB HTPC will in theory be able to hold twice as much in the near future Smile

50% bitrate reduction (for same quality) was just a general goal of the project.

Right now x265 performs fantastically at extreme low bitrates... like 500kbps for 1080p. At that bitrate, x264 is predictably a mess with ragged edges and blocking, banding. x265 is much cleaner, easily 2x better. BUT it still falls into the 'low quality' bracket. No matter that it is 2x better, it is still not something most people want to watch.

As you increase the bitrate towards something more reasonable...like 8Mbps for 1080p....x265 isn't really outperforming x264 by a significant margin. In some cases it's worse at the same bitrate because it's soft/blurry.

That's going to change over time but right now you would be nuts to think of converting your library to HEVC.
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#13
HandBrake 0.10 Brings H.265 & VP8 Encoders

http://www.phoronix.com/scan.php?page=ne...px=MTg0NjA
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#14
I'm tempted to see how fast that actually encodes on my hex core Intel. Not expecting amazing results.
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#15
I just ran it on my i7-4790K (a mere 4 cores at 4GHz - sorry, I can't compete!). It re-encoded a 1h25m BR rip animation in about realtime - much the same as an x264 encode on this material, although I'm not claiming any scientific validity for that observation, as I can transcode 1080p live action in realtime as well.

All other settings the same (notably RF20 with the same decomb and key-int settings) and it spat out a file size of 3.0Gb versus 3.6Gb under H.264. Okay, hardly a detailed, grainy, fast-moving source, but it gives an indication. The good news is that I can't see the difference in quality when playing back in VLC (Kodi not tested, I don't have Helix on this system); the bad is that I see CPU load go from ~ 5% to ~15%, which would kill a low-powered system without silicon assistance.
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