Questions tagged [4k]

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1 answer
396 views

What causes the 1080p version of a video to be blocky but the 4k version look perfectly fine?

I'm a complete beginner in all things photography, video compression and YouTube uploads so please bear with me. I recently uploaded a 4k 30fps video to YouTube, and when I select the 4k option it ...
1 vote
2 answers
12k 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
1 answer
189 views

I just bought a panasonic HC-VX981K 4K camera and wondering which is my best format to shoot in?

I just bought my panasonic HC-VX981K and was wondering which is the best format for just recording perfect video, it states that higher bitrate in 4K MP4 format but I'm hearing AVCHD progressive is ...
0 votes
1 answer
78 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 ...
2 votes
1 answer
783 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 ...
10 votes
2 answers
34k 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 ...
0 votes
0 answers
16 views

what are the factors in TV that affects video quality in cable tv/dish satellite tv in bigger(65 Iinch) 4K TV screens

I happened to visit a TV show room which had so many big TVs(55,65,70,75 inch TVs, Sony Bravia , Samsung , LG , TLC etc..) with amazing technologies such as LED OLED QLED QNED NANO and amazing ...
1 vote
2 answers
581 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?
0 votes
1 answer
22 views

How to calculate lenses parameters to record a pc monitor

I want to make a video audit of my pc screen (4k). The distance would be about 40cm to the centre. Can it be done with much of distortion of the geometry (I cannot place the camera at the centre ...
51 votes
3 answers
108k 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 ...
0 votes
1 answer
23 views

4K video from Panasonic VC8xx broken?

I have recorded some 4K videos as MP4 file on Panasonic VX878 and 9xx. Both produce a video which, when played in VLC or other player on Linux, has 3 tiles: 2 next to each other horizontally at the ...
0 votes
3 answers
33 views

Effect of screen shape on video quality

How does the shape of screens (that is, different "width x height" values while keeping the same total displaying area) affect the quality for a given optimal viewing distance?
1 vote
1 answer
2k 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
1 answer
171 views

Any tips how to increase editing speed on Premiere Pro?

I'm using old notebook, which has a bit trouble with editing fottage highier than fullhd. Is there any approach, how I can, for example work with small files first and than final export will process ...
1 vote
1 answer
7k views

How to output high quality 360 VR video with Premiere Pro?

When editing a 360 video in Adobe Premiere Pro, I noticed that if I import the video into the program and export it again without any additional changes, the resulting file size of the output file is ...
1 vote
2 answers
284 views

Simulating 1080p pan shot by cropping stationary 4K fisheye footage?

I want to achieve a panning shot, but I can't move my camera. The camera is stationary for reasons outside of the scope of this question. Can I throw on a fisheye lense, film in 4K, and then process ...
0 votes
0 answers
33 views

Is there a camera that records video with a quality and style similar to the Black Magic Pocket 4k?

I was looking for a camera to record videos. My aim is to record videos to make films and music videos. I know there are many factors that are independent of the camera to make videos with a '...
2 votes
2 answers
4k views

Why is 4K downsampled so much better than 1080p at low bitrates?

I noticed when I export my footage at low bitrates (eg. 10 Mbps, 1080p), my 1080p footage looks way blurrier than my downscaled 4K footage. This is despite the fact that the original footage looks ...
0 votes
1 answer
213 views

Final Cut: Youtube 4K Upload directly or by file

For 4K video, Is better upload direct to YouTube or Is better to export in ProRes (or another) in hard disk and then upload the file to Youtube? I record usually amateur football matches and upload ...
0 votes
2 answers
1k views

Concatenating in sync MP4 (H264+PCM instead of AAC) from a Sony 2018 Camera

I downloaded these files (at max resolution 4K, that is important), in this order: https://vimeo.com/195782736 https://vimeo.com/196725716 https://vimeo.com/195776765 https://vimeo.com/196651176 ...
0 votes
2 answers
404 views

Downsample in Youtube or in editing software?

Target platform: Youtube Target resolution for audience: Full HD I record 4K in order to get better image quality from smartphone (2x birate of FullHD). Should I resample and export the project in ...
0 votes
1 answer
95 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
1 answer
2k 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
1 answer
2k 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 ...
4 votes
1 answer
719 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 ...
3 votes
2 answers
6k 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 ...
0 votes
1 answer
891 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
3 answers
90 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
0 answers
2k 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 ...
1 vote
1 answer
1k 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
1 answer
93 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
0 votes
2 answers
3k 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
0 answers
62 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 ...
0 votes
2 answers
5k 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
1 answer
460 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
2 answers
162 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)...
0 votes
1 answer
595 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 ...
3 votes
1 answer
428 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 ...
1 vote
2 answers
66 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
1 answer
50 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
1 answer
667 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 ...
0 votes
1 answer
236 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 ...
6 votes
3 answers
12k 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 ...
5 votes
1 answer
6k 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
4 answers
6k 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?
3 votes
1 answer
146 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 ...
1 vote
1 answer
222 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? ...
6 votes
1 answer
2k 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://...
3 votes
1 answer
3k 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
1 answer
78 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 .... ...