This means that the math involved is very complex and takes a long time to calculate. WHY DOES IT TAKE SO LONG TO COMPRESS HEVC VIDEO? does not.įor these two reasons, especially as we move into greater distribution of HDR media, HEVC will become increasingly important.
It came to 20 different formats for each video! This is what’s happening when YouTube displays its “Processing” dialog after you upload a file. NOTE: A couple of years ago, I counted the number of codecs that YouTube converted our videos into. Behind the scenes these social media giants are automatically converting the file we send them into a variety of different codecs and formats for all the different ways we view video today. Instead, we are uploading files to YouTube or Facebook or Vimeo or Twitter. Why? Because we are not supplying media directly to cell networks. The problem is that, for most of us, this isn’t relevant. My research has shown this to be a reasonably true statement: a video created using HEVC at a lower bit rate has the same image quality as an H.264 video at a higher bit rate. This means that if everyone sending files over cell networks used HEVC for all their movies, the cell networks would have 30% more bandwidth available to support more users or more data traffic. HEVC was designed so that a file with 30% lower bit rate would display the same image quality as an H.264 file at the higher bit rate. HEVC (originally called H.265) was invented to help solve this problem. This put a tremendous burden on the cell networks, which weren’t designed for this level of data traffic.
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Not just on our TV sets or computers, but on mobile phones and iPads. However, as phones got smarter and video became more pervasive, we started watching more video. Both these files, when compared to video, are small. Cellular was first invented to carry voice (audio) and, a bit later, text. HEVC was created to solve a problem with cellular networks – they were drowning in video. “True 4K” is 4096 by up to 2304 pixels though more generally 2160.Īnd this screen shows social media compression settings in Adobe Media Encoder.īoth these popular apps can compress 4K images using the H.264 codec. This screen shot illustrates that Apple Compressor can create H.264 files for social media up to 4K in size. However, while those files will be the roughly the same size, they won’t necessarily have the same image quality.īecause image QUALITY is based upon six factors:įor this reason, you can’t compare compressed files solely on final file size. So, two files with the same bit rate will be pretty much the same size, as Richard reported. In general, file SIZE is almost totally determined by bit rate. Let’s start with the easiest: compressed file size. Larry replies: These are great questions, but the answer is complex. I can’t see any obvious advantage of using HEVC. HEVC, with a 15 Mbps compression bit rate, took about 1 hour and 20 minutes to compress.H.264, with a 15 Mbps compression bit rate, took just under 2 minutes to compress.709 color space. When I use Compressor to compress the video: I created a 4K 30 fps project, 4:12 in duration, using Rec. I have a 2017 Retina iMac, running Mojave and have a question relating to H.264 and HEVC.