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+--- Thread: About 4K video... (/showthread.php?tid=167282)
About 4K video... - RAMd®d - 05-16-2014
I've downloaded a 4K file (Elysium trailer) to see how it play on my CD2/16G mini.
It doesn't.
It stutters badly, mostly freezing while the audio continues, then catching jumping forward, maybe playing for a second or less, freezing/stalling, etc.
Ignoring the fact that I don' have a 4K monitor, relegating it to a pointless, bloated (8G!) file, I just wanted to see what's what.
My new mini, i7/8G plays just fine. Obviously, I'm not seeing 4K, but the file plays nicely. I'm not really going anywhere with 4K, not anytime soon, but I'm just curious.
Since I booted both off a Mavericks SSD, it's not the OS. So is it the i7, the HD4000 GPU, or both? Am I correct in assuming that this mini won't drive a real 4K monitor anyway?
Re: About 4K video... - mattkime - 05-16-2014
>>So is it the i7, the HD4000 GPU, or both?
depends upon what hardware the codec is using. could be either or both.
Re: About 4K video... - Blankity Blank - 05-16-2014
Re: About 4K video... - RAMd®d - 05-16-2014
Thanks, matt.
BB, that chart tells me that I will not be doing 4K anytime soon.
Storing 1080p is work as it is.
Re: About 4K video... - N-OS X-tasy! - 05-16-2014
4K video on a C2D? You, sir, are an optimist!
Re: About 4K video... - hal - 05-16-2014
I read through all of the 4k changes with 10.9.3 and got to the end to learn that the max refresh rate is still 30hz. Why buy a $3k monitor to run at 30hz?
Re: About 4K video... - Filliam H. Muffman - 05-16-2014
RAMd®d, what model is your older mini? If it does not support 2560x1600, there is no way it could come close trying to play a 4K video. I think the Intel HD graphics that was the generation before Haswell based computers might be able to output 4K at 30 Hz over a Thunderbolt to HDMI cable but I don't have any CPU's of that era to test. C(-)ris might be a good person to answer this, if his company has bought any 4K class displays.
About four years ago my ancient Windows laptop started choking on 1080 video. The GPU was powerful enough to play them but many of the newer video formats depend on CPU features like SSE5 and later extensions. My opinion is that Intel essentially paid off or strong-armed all the developers in one way or another so that they could take over the laptop/mobile segment. They wanted video performance to depend on the CPU instead of the GPU, the latter is where Intel had been historically the laughing stock weak sister. Intel keeps updating their CPU's in this fashion. Even though an older CPU has the raw MIPS and FLOPS rating, it needs more recent CPU extensions to efficiently decode compressed video that was encoded on the newer architecture.
Re: About 4K video... - Filliam H. Muffman - 05-16-2014
I found an interesting page about getting 4K to work on different versions of OS X, assuming the hardware was intended to work with a Retina display.
mac pixel clock patch
Re: About 4K video... - Mini 9 - 05-16-2014
I just rip stuff to very low numbers of width by height. i can't appreciate all those bits.
Re: About 4K video... - Mr645 - 05-16-2014
hmm, plays fine on my Power Mac G5
NOT
Does play using VLC on my i7 2.3 Mini. It plays as a 1920x1080 video, won't display any larger