livefornow
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4K Digital Photoframe - possible?

Fri Jan 17, 2014 6:35 pm

I have just received my Raspberry Pi and have created a digital photo frame that authenticates with Flickr and downloads pictures tagged with photoframe from my private account. I have it running nicely on my regular 1080p television.

My intention would be to ultimately buy this 4K television so I can see the photographs more beautifully.
http://www.amazon.com/Seiki-Digital-SE3 ... B00DOPGO2G

Is there anyway I can get Raspberry Pi to support 4K or is 1080P the maximum?

Thanks
LFN

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AndyD
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Re: 4K Digital Photoframe - possible?

Fri Jan 17, 2014 8:39 pm


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Jessie
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Re: 4K Digital Photoframe - possible?

Sat Jan 18, 2014 6:07 am

The current crop of 4k displays require two HDMI cables or one display port cable. In both cases they are detected as two separate displays. Since the R Pi does not have two physical HDMI ports or a Display Port it would be incompatible with a 4K display. Until a device comes out with a HDMI 2.0 port 4k displays will continue to require two HDMI cables because there isn't enough bandwidth avalible.

Aydan
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Re: 4K Digital Photoframe - possible?

Sat Jan 18, 2014 12:52 pm

Jessie wrote:The current crop of 4k displays require two HDMI cables or one display port cable. In both cases they are detected as two separate displays. Since the R Pi does not have two physical HDMI ports or a Display Port it would be incompatible with a 4K display. Until a device comes out with a HDMI 2.0 port 4k displays will continue to require two HDMI cables because there isn't enough bandwidth avalible.
If the display is detected as two independend half-monitors then you culd probably use two raspis, each serves half the image.

Regards
Aydan

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Jessie
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Re: 4K Digital Photoframe - possible?

Sat Jan 18, 2014 5:33 pm

Aydan wrote:
Jessie wrote:The current crop of 4k displays require two HDMI cables or one display port cable. In both cases they are detected as two separate displays. Since the R Pi does not have two physical HDMI ports or a Display Port it would be incompatible with a 4K display. Until a device comes out with a HDMI 2.0 port 4k displays will continue to require two HDMI cables because there isn't enough bandwidth avalible.
If the display is detected as two independend half-monitors then you culd probably use two raspis, each serves half the image.

Regards
Aydan
Good point. All you would need to do is get the two independant RPi to display their half of the image.

monergy342
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Re: 4K Digital Photoframe - possible?

Sat May 24, 2014 12:34 pm

Has anyone tried to play 4k using 2 Raspberies? I'm a bit confused how to even attempt to play half of the content from each raspberry... how do you sync them both?

Aydan
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Re: 4K Digital Photoframe - possible?

Sat May 24, 2014 9:04 pm

monergy342 wrote:Has anyone tried to play 4k using 2 Raspberies? I'm a bit confused how to even attempt to play half of the content from each raspberry... how do you sync them both?
Syncing video over multiple raspberries has been done. There was a blog post on the raspberry blog about this some time ago. They managed to create a single, synchronous video capable display from arbitrarily positioned displays.
But decoding 4k content will most likely be impossible because as far as I know, the hardware decoder on the GPU only supports up to 1920x1080.

Regards
Aydan

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Re: 4K Digital Photoframe - possible?

Sun May 25, 2014 7:03 am

• Don't like the board ? Missing features ? Change to the prosilver theme ! You can find it in your settings.
• Don't like to search the forum BEFORE posting 'cos it's useless ? Try googling : yoursearchtermshere site:raspberrypi.org

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GTR2Fan
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Re: 4K Digital Photoframe - possible?

Sun May 25, 2014 7:26 am

livefornow wrote:My intention would be to ultimately buy this 4K television so I can see the photographs more beautifully.
http://www.amazon.com/Seiki-Digital-SE3 ... B00DOPGO2G
You might want to read through some of the buyer reviews before committing to purchasing that TV. There's a lot more to good image reproduction than resolution alone. From what some of the reviewers are saying when comparing it to any half-decent Full-HD TV, its overall picture quality leaves a lot to be desired.
Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.

ame
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Re: 4K Digital Photoframe - possible?

Sun May 25, 2014 9:09 am

I watch movies on a 640x480 35 lumen pico projector. It's awesome and I can chuck it in my pocket. I can not contemplate owning a 4k TV and figuring out how to move it from place to place.

elatllat
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Re: 4K Digital Photoframe - possible?

Mon Aug 11, 2014 4:54 pm

Jessie wrote: (18 Jan 2014 06:07) The current crop of 4k displays require two HDMI cables or one display port cable. In both cases they are detected as two separate displays. Since the R Pi does not have two physical HDMI ports or a Display Port it would be incompatible with a 4K display. Until a device comes out with a HDMI 2.0 port 4k displays will continue to require two HDMI cables because there isn't enough bandwidth avalible.
That information was outdated 5 years before it was posted.
http://en.wikipedia.org/wiki/HDMI#Version_1.4
The $350 Seiki SE39UY04 will do 4k over HDMI 1.4.
raspberrypi using 4k:
http://www.raspberrypi.org/forums/viewt ... 38&t=79330
SBC with 32GB RAM: https://hardkernel.com

FAQ : https://raspberrypi.stackexchange.com

Unanswered: https://www.raspberrypi.org/forums/search.php?search_id=unanswered

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Jessie
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Re: 4K Digital Photoframe - possible?

Mon Aug 11, 2014 5:32 pm

elatllat wrote:
Jessie wrote: (18 Jan 2014 06:07) The current crop of 4k displays require two HDMI cables or one display port cable. In both cases they are detected as two separate displays. Since the R Pi does not have two physical HDMI ports or a Display Port it would be incompatible with a 4K display. Until a device comes out with a HDMI 2.0 port 4k displays will continue to require two HDMI cables because there isn't enough bandwidth avalible.
That information was outdated 5 years before it was posted.
http://en.wikipedia.org/wiki/HDMI#Version_1.4
The $350 Seiki SE39UY04 will do 4k over HDMI 1.4.
raspberrypi using 4k:
http://www.raspberrypi.org/forums/viewt ... 38&t=79330
You are also reserecting a couple month old thread. I am aware that people have gotten 4k @ decent refreshes through overclocking the pixel clock. I'm not going to go through old posts to correct myself.

Thanks for the link to HDMI 1.4 the Pi is a 1.3a device.

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