So, whenever you play one of these files on your computer, your computer will de-mux them. So imagine, after you mux all the inputs, like video and audio, together into a single container, like a MOV or MP4 file, you need to unpackage these elements to be able to have them played. So, this process separates all the inputs muxed in the container file. De-muxing, aka Demultiplexing, is the process of separating a single output into its inputs. Since muxing is the process of combining multiple inputs into a single singal, de-muxing naturally is the opposite process. Since in many regards the muxing process is the packaging stage, there’s also a need for a stage to unwrap the inputs after being packaged. This allows us to sent files with all of the important inputs compiled together in one file. Essentially, these containers house the inputs. When saving, you’re compressing all of the different inputs into an output container, like MOV or MP4. So when you’re working in a video editing software and you’re going to save the file, you’re engaging in the process of muxing. This would include things like video, audio, and subtitles. At the start of the process, you have numerous inputs you’re looking to combine. Here’s a good way to look at muxing in video processing. Think of them like a shipping box will a few items in it. They all house multiple, individual inputs together. Containers come in a few forms, such as multiple media files like MP4, AVI, MOV, and WEBM. When we take a look at digital video processing, multiplexing combines metadata, and things like subtitles, and places these inputs into a single container. In video processing, multiplexing combines video and audio inputs together. Video courtesy: Simple Put How muxing works in video processing Here’s great breakdown of the muxing process. A single wire is sending serval signals simultaniously. When there’s multiple calls being made on the same telephone wire, multiplexing is at work. A classic example of muxing comes from telecommunications. The specific definition of multiplexing is the process of taking multiple inputs, packaging them together, and sending them over a single output line. So, when you combine these roots together, they create the definition of: weaving together many elements. The root -plex means woven together and the root multi- means many or much. If you break down the term multiplexing into its Latin root words, you’ll find its meaning. The term “muxing” is an abbreviation for multiplexing. We’ll also dive into the process of de-muxing and how it differs with muxing. We’ll also take a look at how it works and how it’s used. While muxing can be used in a variety of ways, it plays an important role in video processing. It’s present in everyone one’s lives every single day. Some might even assume it’s a typo for mixing (it’s not). There’s plenty of people out there who’ve never heard of this important process. Never head of the muxing? You’re not alone.
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