Transcoding and Why Is It Critical for Streaming

Streaming media is booming and everyone is getting onboard. A 2015 report by Cisco predicted that in 2016, 6.1 exabytes of data have been to be consumed on mobile platforms. It was anticipated 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 development will continue.

If you happen to’re concerned with streaming media, you either know all about video transcoding, or you’re wondering why you keep hearing about it. If you aren’t sure you want it, that places you within the second camp. An understanding of video transcoding and learn how to do it is critical for any success with streaming video; particularly if it’s worthwhile to deliver streaming video to a wide range of completely different devices.

What’s Video Transcoding?

Video transcoding, typically called video encoding, is the conversion from one digital encoding format to another, akin to for film data files. This includes translating all three parts of a digital video at the same time — the file format, the video, and the audio.

This is a vital function when a target system does not help the present format of your media, or has limited storage capacity that requires a reduced file measurement (think going from WMV to MP4). It’s also used to convert incompatible or obsolete data to a greater-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical if you need your content to succeed in more end users.

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

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

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

With the intention to render the Speex audio, most individuals might want to watch using Flash Player on a computer. Now you’ve just excluded virtually anybody with slower data speeds, tablets, and mobile phones.

With video transcoding, you can create a set of time-aligned video streams, every with a unique bitrate and frame size, while converting the Speex audio to AAC audio. This group of streams is internet-pleasant, permitting you reach virtually any screen on the planet.

How is Video Transcoding Carried out?

Video begins life in a format distinctive to the camera or program used to capture 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 change the unique format into one allowing the video and audio to play properly on a consumer’s units — be they laptop, tablet, smartphone, or tv.

Video encoding, or video transcoding, entails 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 Formats and File Types in Video Transcoding?

When talking about video transcoding, we seek advice from file codecs, file types, and something called codecs.

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

Video and audio codec codecs consult with the applied sciences 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 or not your video file must be transformed to a supported format.

DaCast, for example, 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 each compressed with Windows Media Audio (WMA) and Windows Media Video (WMV) codecs.

MP4 video provides better quality and compression over WMV, permitting you to store better quality video for a similar file size. A superb video transcoding program might be able to transform a number of file formats and codecs.

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