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Requirements of 4k video?


Jochen_S

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Please pardon my dumb questions. - I 'll get a 4K screen anyhow sooner or later and read the new Sony Alpha 7s

will be able to capture 4k video but need an external recorder. What kind of device (including price tag weight

and unplugged capacity) is needed for recording? Will a gaming desktop do the job? Do I need a RAID of how many

interlaced HDDs to capture an editable stream? can one go for a more portable PC solution for just the recording?

What is the lenght limit for connection cables A7s to recorder? How long is a Gigabyte? Or what are the data

junk rules of thumb with 4k? Is there editing freeware? Or will I have to pay arms and legs? Can an i7-2600K @

3.40GHz with 16GB of RAM do anything in that field? Or are way more powerful computers needed? What kind of

storage media is fast enough for playing compressed and uncompressed 4k footage? - I obviously know nothing about

movie capturing besides why it isn't my usual cup of tea. And am asking for the figures giving a rough idea of

needs and requirements to handle 4k video at least somehow. once in a blue moon. - Links to informative sites

would be appreciated.

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<p>I'm currently putting together some things similar to what you are talking about. I purchased a Sony FDR AX100 camcorder. With that I got a Sandisk Extreme Pro 64GB Secure Digital Extended Capacity flash memory which was recommended to capture at the hightest rate on the camcorder.<br /><br />I'm waiting to receive a Dell XPS 8700</p>

<ul>

<li>Processor Number: I7-4770</li>

<li>Processor Speed: 3.9 GHz</li>

<li>RAM Size: 16 GB</li>

<li>Hard Drive Size: 2.032 TB</li>

<li>Graphics Processor: NVIDIA GeForce GT 635</li>

</ul>

<p>In the past I've used Corel VideoStudio for video editing but I think I'm going to be better off using Adobe Premier CC. It seems not all video editing software is ready for 4K editing.<br /><br />In the hopes I can do some stuff on my Laptop, an early rendition of Intel's I7, I've upped the memory to 8 GB (the max for it) and I've installed a 500 GB SSD.<br /><br />So far all I can offer is: The 4K video seems to play well enough on my laptop. I believe I will be able to do at least short videos with it. I think the Dell desktop I have on order is going to do the trick nicely. <br /><br />I'm kind of in a high anticipation level right now. I'm still doing installations on my upgraded laptop before I attempt anything with it. I expect to have my desktop in another week or two. <br /><br />HD Video by itself can offer some challenges, this will be a whole nother ball game. I'm looking forward to see what I can do with it.<br /><br />You might try posing some questions to users on Youtube that have already posted some 4K video. You probably should stick to those that are less than big productions - in my mind they will be more likely going the route you are looking at. <br /><br />Good luck, John Kent<br /><br /></p>

 

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<p>Thanks John. - I googled and calculated that's US$100 for some 11.5minutes or 11 seconds per GB, assuming the camcorder uses the full speed of the card?<br>

Do the "edited for just watching" final files shrink significantly due to compressing information of multiple frames? Or are you recording in such a format not really made for individual frames holding everything and easy cutting? <br>

What's the difference between the A7s and the Sony FDR AX100 video wise since the A7s doesn't seem able to write the files on something inside the camera? - I'm still confused.</p>

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<p>I'm a little confused by the A7S as well. It says it requires something separate to record 4K. That sounds like another chunk of money to me. I think the differences between the A7S and the AX100 is, the A7S is more of a photo camera that does 4K where as the AX100 is a video camera that will take some photos. The A7S has very high ISO capabilities and interchangeable lenses. The AX100 uses a singular zoom lens and is more like a standard camcorder (that will do 4K).<br /><br />I don't really know yet what to expect from compression options. What I do know is the 4K videos that are on Youtube and Vimeo no doubt are compressed in order to stream, even at that, the quality of some of those videos are exceptional.<br /><br />I'm not sure I entirely understand what you are asking regarding US dollars in regard to minutes or GB. It does seem if you were to shoot without any compression it could get expensive using flash memory. I think even a small amount of compression will be very helpful in this regard. Hard drive disk space is relatively cheap but you can burn up some dollars in flash memory to record it. It will continue to get cheaper though.<br /><br />I've already shot a few little clips. I'm looking forward to piecing them together to see how it all comes out and just how the process will work out. </p>
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  • 2 weeks later...

<p>Here's an alternative thought to the Sony 7s. As well speced as it is, you might want to consider the new Panasonic GH4. It records both Ultra HD (3840x2160) and Cinema 4K (4096x2160). The consumer Ultra HD format can be recorded internally within the camera, with output directly to a 4K display or down converted internally to 1080. The camera also offers the option of capture in professional codecs for output to an external recorder. The GH4 won't do as well as the SONY in very low light conditions but with normal lighting it is superb. Check out the demo on YouTube. You should have a very fast connection for streaming to view this properly and be sure you check the 4K resolution option. The camera also will shoot 1080 at 96 fps for slow motion playback.</p>

<p>http://dslrvideoshooter.com/panasonic-gh4-4k-video-camera-specs-released-4k-demo-footage/</p>

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  • 4 weeks later...

<p>Hi<br>

the only recorder that would be able to record 4K for the Sony A7S is the Atomos Shogun (around $1800). You need to get an additional hard drive. <br>

It's pricy but you can also use it as a monitor! A monitor is essential for 4k video. <br>

For the desktop, the Sony doesn't record raw so it doesn't have to be a top of the line desktop. Any desktop with 16GB RAM, i7 CPU and a Nvidia card (at least 2GB RAM for the video card) is good. </p>

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  • 2 years later...

<p>I would recommend getting a video camera with built in recording. I currently own the Sony FDR-AX100 and use a Dell Precision 5510 laptop with xeon processor and 32 GB Ram for 4k editing. </p>

<ol>

<li>I prefer a video camera format over the DSLR I.E. The Panasonic GH4.</li>

<li>Before buying a Sony DSLR which required external recorder I would get a Black Magic Studio 4.6K.</li>

</ol>

<p>The key is it having XLR inputs and proper monitoring capabilities.<br>

I have found a nasty flaw with Sony Camera's. When using a 7" external monitor the Sony FDR-AX100 will not output to the HDMI port while recording in 4K. Yes, for normal work when using the built-in display it works great but if you try to build it into a professional rig you will have immediate issues when it comes to external monitoring. </p>

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