Transcoding and Why Is It Critical for Streaming

Streaming media is booming and everyone seems to be getting onboard. A 2015 report by Cisco predicted that in 2016, 6.1 exabytes of data had been to be consumed on mobile platforms. It was expected to rise to 9.6 exabytes in 2017 and leap to 15.2 exabytes in 2018. Without knowing the precise numbers, it is safe to say the demand and growth will continue.

When you’re concerned with streaming media, you either know all about video transcoding, otherwise you’re wondering why you keep hearing about it. If you happen to aren’t positive you want it, that places you in the second camp. An understanding of video transcoding and easy methods to do it is critical for any success with streaming video; especially if it is advisable deliver streaming video to a variety of totally different devices.

What is Video Transcoding?

Video transcoding, generally called video encoding, is the conversion from one digital encoding format to a different, comparable to for film data files. This involves translating all three elements of a digital video on the similar time — the file format, the video, and the audio.

This is a vital function when a goal gadget doesn’t help the current format of your media, or has limited storage capacity that requires a reduced file size (think going from WMV to MP4). Additionally it is used to transform incompatible or obsolete data to a greater-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical whenever you need your content to succeed in more finish users.

For example, you’re preparing to do a live stream out of your office. It’s a possibility that you’re capturing webcam audio and video with a browser-based desktop application like Adobe Flash, which generates 1080p H.264 video and Speex audio.

Your show can be delivered live to on-line viewers; nevertheless, an try and stream it directly could have problems:

These viewing without enough bandwidth won’t be able to view the stream — they’ll be watching the ‘buffering’ circle.

To be able to render the Speex audio, most individuals might want to watch utilizing Flash Player on a computer. Now you’ve just excluded almost anybody with slower data speeds, tablets, and mobile phones.

With video transcoding, you can create a set of time-aligned video streams, each with a different bitrate and frame measurement, while changing the Speex audio to AAC audio. This group of streams is internet-friendly, allowing you reach virtually any screen on the planet.

How is Video Transcoding Finished?

Video begins life in a format distinctive to the camera or program used to seize your images and sounds. This is typically not the format wanted to deliver the video on-line or play it from one other device. Video transcoding is used to alter the original format into one permitting the video and audio to play properly on a person’s gadgets — be they laptop, tablet, smartphone, or tv.

Video encoding, or video transcoding, involves a -step process. First, the original file is decoded to an uncompressed format. Second, this uncompressed format is then encoded into the goal format.

What are Codecs and File Types in Video Transcoding?

When talking about video transcoding, we discuss with file formats, file types, and something called codecs.

Video format specifies how video and audio have been mixed and tells playback gadgets methods to play the files.

Video and audio codec codecs confer with the technologies used to each create and play back the digital video and audio.

Examples of file types are MPEG-4 (MP4), Quicktime (MOV), and Flash Video (FLV). The key variable in most cases is the streaming platform you use. Always check what formats and codecs are supported by the platform you wish to use, and whether your video file must be transformed to a supported format.

DaCast, for instance, requires an MPEG-4 (MP4) file format with an H.264 video codec. Windows Media Video (WMV) files are Advanced Systems Format (.asf) files that include audio, video, or both compressed with Windows Media Audio (WMA) and Windows Media Video (WMV) codecs.

MP4 video provides higher quality and compression over WMV, allowing you to store better quality video for a similar file size. A superb video transcoding program will be able to convert multiple file formats and codecs.

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