Grandma Is Naked Again Videos in High Definition
How tin I shrink videos so I don't lose a lot of the quality? My telephone, a Samsung Milky way S10, makes actually high quality videos just I would be satisfied if they looked like normal videos. Yanis
Videos take up a lot of space, and a lot of research goes into making them smaller. Other things beingness equal, a key factor is the size of the image, just as information technology is with withal photographs. Yous can also reduce the file size by arbitrarily reducing the information rate or, for preference, past using a more than efficient video compression system. The current favourite is MPEG-iv/H.264/AVC (Advanced Video Coding), which is usually called MP4 for short. Technically, MP4 is the file container while H.264 is the codec that codes and decodes the video.
In that location are some good reasons for reducing video file sizes. For instance, y'all might desire to customise a high-resolution video for a low-resolution screen. You might also desire to fit several videos on a device with limited storage, such as a smartphone or tablet, or an optical disc such as a CD-Rom or DVD. Y'all might want to send the video to someone else; reducing the file size will reduce the upload and download times.
In general, however, information technology's a bad idea to reduce the size of irreplaceable videos simply to salvage space. Deejay drives are cheap, and a £70 4TB drive can concur thousands of videos. You can also use cheap or free online storage at sites such equally pCloud, Mega.nz, MediaFire and Yandex.Disk.
Screen resolutions go on increasing, and 640 ten 480-pixel VGA videos that used to fill a screen now await tiny on today's 3840 ten 2160-pixel 4K screens. So, always shoot at the highest resolution that's practical, and go on it. In the long run, yous will need every pixel y'all can get.
Earlier we get to the details, a warning: never edit an original video file. Always go along external backups of original files, and always piece of work with copies. Of course, this likewise applies to personal photos and audio files. Notwithstanding, losing a 2GB video of your holiday or a kid's birthday party will hurt more than losing the odd photograph.
Reducing resolution
A standard reckoner screen with a resolution of 1280 10 1024 shows 1,310,720 pixels, which is i.25MB. Your Samsung Milky way S10 can shoot videos at an even higher resolution of 3840 x 2160 pixels or UHD (ultra-high definition), where a total screen paradigm needs 8,294,400 pixels or 7.9MB – more than six times every bit much. Fifty-fifty with pinch, thirty frames per second adds up.
If yous wanted to customise the video for a Windows laptop with a screen resolution of 1366 x 768 pixels (1MB per screen), yous could make it much smaller.
To get some existent numbers, I downloaded 4K Sample2.mp4 from the Samsung section of Ashok Patel's AppsLoveWorld website, which offers a few complimentary mp4 video files for testing or demo purposes. If you just want to await at information technology, it's as well on YouTube. Information technology has been shot from a drone so perhaps not a phone, merely either way, this 63-second video takes upwards 165MB.
Reducing the resolution from 3840 ten 2160 pixels (UHD) to 1280 x 720 (Hard disk) cutting the file size from 165MB to 24MB, so I could well-nigh fit seven videos into the space previously occupied past one. And while information technology no longer filled my 4K screen, it still looked proficient quality to me.
I used WonderFox'southward free HD Video Converter Factory, which reduced the video to 24MB in less than 20 seconds. HandBrake reduced information technology to 21.3MB but worked the processor harder and took a minute longer. Whatever Video Converter reduced it to 7.6MB with a noticeable loss of visual quality. There are lots of programs that will do this job, so it'south just a question of finding i you lot like.
Pro tip: Handbrake can convert a smartphone'due south variable frame charge per unit videos to a abiding frame rate for editing. (It stops the audio going out of sync.)
Aspect ratios
When reducing video resolutions, it is very important to keep the same aspect ratio (width to height). If you don't, clocks will no longer look round and faces will be distorted so they are either squashed or elongated like a Modigliani portrait.
Here'due south a guide to the most common resolutions for people who can't separate 1024 by 576 in their heads.
Today's most pop video format has a 16:nine aspect ratio, which is widescreen. This covers HD (1280 10 720), Total Hd (1920 ten 1080) and UHD (3840 x 2160). You lot can likewise use 1024 x 576, 1600 x 900, 2560 10 1440 and other resolutions while keeping the aspect ratio the same.
Yesterday'south most pop format had a 4:3 aspect ratio, which used to exist the standard for TV sets and early on monitors. You can convert these videos to and from 640 x 480 (VGA), 800 x 600 (SVGA), 960 x 720, 1024 x 768 (XGA), 1440 x 1080, 1600 ten 1200 (UXGA) and 2048 x 1536.
If yous take a video with an odd attribute ratio, such equally 16:x, then reprocess it to a popular widescreen width while keeping the summit in proportion.
Cutting data rates
When you reduce the resolution of a video, it fills a smaller area, so you don't need to send the screen as much information. However, in some video editors, yous tin can set the data rate to almost anything y'all like. This will reduce the image quality as well every bit the file size.
Many people don't perceive or don't intendance most the deviation in sound quality between mp3 music files at 128kbps instead of 256kbps or 320kbps. Similarly, many don't care if their videos run at ii-3Mbps instead of 20Mbps or more. In fact, motion picture-streaming websites may reduce the information rate from 10-20Mbps to 2-3Mbps considering information technology saves a huge amount of bandwidth.
When I converted the 4K sample above, HDVCF automatically reduced the original bit-rate of 21,722kbps to 3,346kbs, which is reasonable for the size. Whatsoever Video Converter reduced information technology to 996kbps, which was too much. I should take changed the quality setting from normal to high.
Alternatively, I could have retained the original resolution and reduced the data charge per unit to a not-too-shabby 8,000kbps. Doing this in HDVCF reduced the file size from 165MB to 61MB, with watchable results. Dropping information technology to two,659kbps (I asked for 3,000) reduced the file size to xx.2MB while retaining the original resolution, but with poor results – also many visual artefacts.
This approach works all-time with static subjects. A video of a talking head doesn't need every bit much bandwidth as an ice hockey game.
Alter the compression
One of the best ways to reduce the size of a file is to change the way it's compressed. Today's leading codecs, mainly H.264, are much more efficient than the ones typically used in onetime mpg, wmv (Windows Media Video) and avi files. Video transcoding programs usually take it for granted that you'll want to convert any onetime video into some form of MP4/H.264/AVC.
The catch, of course, is that your processor has to practice a lot more piece of work to decode the college level of compression. Happily, processors are more than powerful than they used to be, and Intel got round the problem by edifice H.264 decoding into the CPU, nether the Quick Sync Video label. A twelvemonth after, in 2012, AMD followed with VCE, its own Video Coding Engine.
Your Samsung phone uses MP4 as standard, simply the settings let you lot plough on "high-efficiency video" and "record videos in HEVC format to save space". Samsung warns: "You may not be able to play HEVC videos on other devices or share them online."
Using HEVC would reduce the size of your videos, but I probably wouldn't do it.
HEVC (high-efficiency video coding) is shorthand for H.265, which should have been a shoo-in to replace H.264, H.263, H.262 then on. Unfortunately, it is heavily "patent encumbered" – and Samsung seems to own far more of the patents (iv,249) that anyone else.
Forth with the patents and patent sharing pools, H.265 brings a dramatic increase in royalties over H.264, plus the threat of content distribution fees. A breakaway group has therefore formed an Alliance for Open up Media to create a royalty-free alternative called AV1.
Normally, this wouldn't corporeality to a hill of beans. In this instance, the brotherhood includes Amazon, Netflix, Apple, Google, Microsoft, Facebook, Intel, Arm, AMD, Nvidia, Cisco and … Samsung!
All bets are off until AV1 appears.
Have yous got a question? Electronic mail it to Ask.Jack@theguardian.com
Source: https://www.theguardian.com/technology/askjack/2020/mar/05/how-do-i-shrink-the-size-of-my-phone-videos
0 Response to "Grandma Is Naked Again Videos in High Definition"
Kommentar veröffentlichen