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6
votes
1answer
325 views

Downsampling 4K footage for an increase in chroma sub-sampling

We have a Lumix GH-4 camera, which can shoot in 4K with 4:2:2 color space. I'd like to be able to convert the footage to 1080p 4:4:4 color space. I've read that there some ways of doing this: ...
5
votes
3answers
1k views

Does 4K impact quality when filming in low light? (other parameters being equal)

I'm wondering if filming with a 4K camera, possibly downsizing to Full HD, will give better detail than filming with a Full HD camera (other parameters being equals). Sub-question (maybe I should ...
4
votes
1answer
5k views

How to downsample 4k to 1080p using ffmpeg while maintaining the quality?

I have some 4K 3840x2160 footage in MP4 format that I need to bring down to 1080p. I tried running ffmpeg -i orig.mp4 -vf scale=1920:1080 smaller.mp4 but the result is very poor quality, with ...
3
votes
2answers
981 views

H.264 Max Resolution

I was trying to find the technical reasons for why H.264 is limited for 4K. Obviously that in terms of bit-rate it becomes less efficient but the encoding itself is limited and for some reason, I ...
3
votes
1answer
35 views

How to capture 4K screens?

I want to create videos for youtube, but because I am using a 4K screen it is very difficult to find a proper recording solution. My idea was to buy a card, that I can put into my computer that ...
2
votes
2answers
48 views

Do Film Makers Want 4k?

I am looking at upgrading our camera equipment and am trying to work out, to 4k or to not 4k? We need a relatively compact camera in size and weight for our productions specifically. For generic ...
2
votes
1answer
120 views

Convert resolution 4096x2304 to 3840x2160 keeping the quality the same

I have recently come into possession of a couple of 4k movies with a resolution of 4096x2304. Unfortunately my Samsung 4k TV wont play anything over 3840x2160. I have managed to re-encode the videos ...
2
votes
1answer
33 views

How to composite live 4K video with prerendered alpha matted footage

I'm looking to take a 4K live video feed, and composite alpha channeled footage on top of the live footage, all in realtime with minimal latency, I then want to display the output on a 4K screen .... ...
1
vote
1answer
33 views

Why does 8K have 16 times the pixels compared to 1080p?

Considering 2K = 1440p, has twice the pixels compared to 1080p, 4k has four times as many, why does 8k not follow this trend?
1
vote
1answer
41 views

Does it make sense to upgrade my set up to 4K from a (Canon) 70D set up?

I'm not very experienced, but I keep hearing, "it's a good time to upgrade to a 4K setup". This is quite expensive, especially at this stage, but does it make sense from a logistical point of view? ...
1
vote
1answer
91 views

How should I encode my 4K video stream?

I'm capturing uncompressed 4K video from my Sony A7R II via a video capture device, and am using ffmpeg to save the video. My problem is I don't know what codec to use. The two options I tried are: ...
1
vote
1answer
101 views

What is the significance of this “RED, Digital, and Film Format Size Chart”?

Little context is offered when this chart: is linked. What does it mean?
1
vote
0answers
101 views

editing 4k and 3840 × 2160 video with a Mac pro1,1

I just got a Panasonic Gh4 camera and recorded some 4k footage with it. For editing I have a Mac pro1,1 (2007): Dual-Core Intel Xeon - 2,66 GHz NVIDIA GeForce 7300 GT - VRAM:32768 MB 15 GB memory ...
0
votes
4answers
69 views

Why do cinema cameras cost too much?

Why do professional digital cinema cameras like ARRI ALEXA, RED Epic cost that much? They record 4k so do other cheap cameras?
0
votes
1answer
18 views

How to make Sony Vegas Pro 13 work on a 4K display

I bought Sony Vegas Pro 13 recently for my 4K laptop, but when I fired it up, the loading screen did not look good. The text was running into itself, and it didn't fit in the window. When the ...
0
votes
1answer
77 views

Is 4K good enough to choose for special footage such as weddings?

Resolution is obviously better in 4K but can anyone give some insight as to whether other factors of video quality are being compromised? If so, does it make sense to record in 1080?
0
votes
0answers
31 views

4k video running smoothly on intels integrated hd graphics

I hope this is the right place to ask the following question - can intels integrated graphics run 4k video with for instance h264 smoothly (as in no frame skipping)?. I have seen various claims on ...