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Questions tagged [4k]

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0
votes
1answer
12 views

4k upscaled Blu-Ray vs 4k upscaling on a TV

I was recently looking to purchase Game Of Thrones Season 1 on 4k Blu-Ray however after doing some research it seems that the first season was actually all shot in 1080p so the 4k blu ray discs are is ...
1
vote
2answers
46 views

Does Youtube accept 10bit uploads? If so, what codec should I use?

I am launching a series of videos to Youtube. These videos have a black background and lots of colored gradient changes. 4k, 60fps. Unfortunately this picture style is causing terrible banding ...
0
votes
1answer
232 views

Is there a way to upscale without re-encoding?

Basically I need to take a h.264 8 bit 1080p render and upscale it to 4k without re-encode. Is it possible? And if it is, does the container matter? Cause ideally it needs to be mp4 container, ...
1
vote
1answer
68 views

The 4k videos from Sony a7iii are quite large by default, suggestions on HQ ways to compress?

The videos directly from the Sony a7iii set to 4k 100mbps are quite large. I've tested compressing them separately and see little video loss. I wonder if the camera has an option to by default apply ...
0
votes
0answers
84 views

Is it practical to record hours of 4K video in the field using ffmpeg with low quality loss?

Is it practical to use ffmpeg to capture hours of 4k video, reliably and with low quality loss? Or, has anyone tried it and discovered that it's really, really hard to do it well? We are setting up ...
0
votes
1answer
232 views

Is 4K 4.2.0 just HD 4.4.4

I've been reading about codecs lately and found out, that the 4.2.0 codec combines 4 pixels color to one used for all 4 of them, effectively lowering the filesize. Now how does this compare to a ...
0
votes
0answers
25 views

4k video on full hd screen

I can't understand this principle and I don't know if I'm doing it right. I bought a go pro hero 6 a few months ago and every time I try to view the videos recorded in 4k on my full HD monitor they ...
0
votes
3answers
60 views

Can upconverting 1080p videos on 4k TVs, lower their quality?

I read somewhere its better watching 1080p content on native 1080p (Full HD) TVs, because they keep ORIGINAL video resolution without down\upconverting . If that's true, so buying 4k TVs without any ...
1
vote
1answer
264 views

Best render settings for broadcast/4k TV

I see a lot of tips for getting h264 renders onto web streaming sites in 4K but not much on TV. Should I just go with Animation/lossless for my “master”? seems crazy for a 22 minute program but HDD is ...
1
vote
0answers
604 views

how to downscale 4k with ffmpeg

I have been searching all the web on how to downscale 4k video so that it can play on my non 4k TV. My 4k video has a resolution of 3840 x 2160 with an audio format of pcm_s16be in a mp4 container. I ...
0
votes
1answer
44 views

Datavideo KMU-100 FORMAT

I was able to get only one 4k camera signal into my KMU-100,to get 4 HD outputs. The issue am facing right now is, How do i get my two 4K cameras working on the KMU-100? Because,the format i used for ...
0
votes
2answers
1k views

Editing 4k footage in 1080p project and rendering in 4k?

I edited my 4k footage in a 1080p Premiere Pro project. Now If I render the project in 4k, will the 4k clips keep their Quality or will they downscale to 1080?
1
vote
0answers
23 views

Best encoding setting for presentation like video

I have a video series that have a low fps by nature. The videos are in presentation format with audio. The video is produced using Adobe Premiere Pro CC 2015 and contains 4K image clips and 256kbps ...
1
vote
1answer
326 views

Recording 4K H.264 from HDMI to External Media

I've been searching for an answer to this but haven't been able to find anything definitive. I use an Orah 4i 360 livestream video camera. It sends the camera video to a stitching box. The stitching ...
3
votes
2answers
130 views

GoPro Hero 5 Session camera for long shot (crowd shot)

I am asked to shoot noncommercial event, which will last several days. I have my usual camera for close and middle shots (Lumix G6), and I am thinking to by cheap 4K camera for long shots (crowd shots)...
3
votes
1answer
437 views

.mkv file not playing in HEVC/H.265 supported player

I wanted to play UHD (4k) videos in my new LeTV (Super3 X55). So I used youtube-dl to download 4k YouTube videos (which are humongous btw) but for some reason most of them do not play. The TV's ...
0
votes
1answer
303 views

Sony Vegas Pro 13 insane 4k export size

So from my knowledge (and actual experience) Vegas 13 has one option for exporting 4k videos. My phone has a 4k camera, and recently I built a beefy computer and decided to edit some 4k footage. The ...
2
votes
1answer
442 views

Premiere sometimes not rendering 4k MXF files from Sony FS5

I'm working in 4k for the first time. I've got footage from a variety of sources, and I'm working on a 4k timeline (see sequence settings below). When I try to render between In and Out points, I ...
2
votes
2answers
2k views

Downscaling 4K YUV420 to 1080p YUV444 with ffmpeg introduces red tint

I am downscaling 4K YUV420 video from the Panasonic LX100 to Full HD YUV444 using the ffmpeg console in Windows, and a script provided by user karl on the Personal View forum, modified for outputting ...
1
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2answers
53 views

Tips to start making a little production

So I have to make a little commercial for a class at my college and it is a video of about 1 min. I already have the idea of how all is going to be but I'm worried that at the moment of the edition ...
0
votes
1answer
37 views

Where can one find a current and definitive reference for video quality as it pertains to hosting HTML5 Videos?

At my job, I have encoded our sites videos for a couple years by using X-Media Re-encode: MP4 1024x576 VBR 1500kbps WebM 1024x576 CBR 1200kbps I never had complaints about quality or buffering, I ...
0
votes
1answer
501 views

DJI Osmo X3 vs Canon 5D Mk III for easier chroma green screen keying

Everything I've read indicates I'll get better green screen footage using a 4K camera rather than an HD camera as the increased resolution helps. But what about other factors such as the noise on a ...
3
votes
1answer
235 views

4K Workflow in FCPX - crop down for multicam angles

Shot an 80min interview @ 4K 422LT (271GB)on BMPC and want to create 3x 720p angles for multicam. Unsure if it's best to create them as compound clips cropped from the one 4K master clip inside of ...
0
votes
1answer
114 views

What is the origin of 4K term?

According to Wikipedia: The name “4K resolution” refers to a horizontal resolution of approximately 4,000 pixels. However, I believed that 4K is called like this simply because it has four times ...
0
votes
2answers
3k views

Downscaling 4k to 1080p in Premiere Pro, Image Zooming 2x

When I drop 4k footage onto the timeline in Premiere Pro, I get a 4k sequence. When I change the sequence to 1080p, the image zooms in. This makes sense. I then scale the image back 50% and I'm back ...
1
vote
1answer
78 views

FCP retime timelapse image gets blurry

If i retime (speed up) my 4k footage, the image gets blurry. If i stop the movie, i see a crispy still image! Why? I already tried to slow time the footage but it doesn't work Thanks
1
vote
1answer
594 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 ...
1
vote
1answer
388 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?
5
votes
1answer
4k 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: ...
2
votes
4answers
2k 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?
1
vote
1answer
95 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? ...
3
votes
1answer
61 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
1answer
1k 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
59 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 .... ...
6
votes
2answers
21k 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 ...
2
votes
2answers
58 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 ...
0
votes
1answer
142 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?
1
vote
1answer
958 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?
5
votes
3answers
7k 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 ...
1
vote
0answers
237 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 ...
14
votes
2answers
30k 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 the ...
6
votes
1answer
849 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: http://...