Streaming media is booming and everyone is getting onboard. A 2015 report by Cisco predicted that in 2016, 6.1 exabytes of data were 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 exact 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, or you’re wondering why you keep hearing about it. In the event you aren’t positive you want it, that places you in the second camp. An understanding of video transcoding and how to do it is critical for any success with streaming video; especially if you have to deliver streaming video to quite a lot of totally different devices.

What is Video Transcoding?

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

This is a vital function when a target machine doesn’t support the present 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 convert incompatible or obsolete data to a better-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical once you need your content to reach more finish users.

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

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

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

So as to render the Speex audio, most people might want to watch using Flash Player on a computer. Now you’ve just excluded almost anyone with slower data speeds, tablets, and mobile phones.

With video transcoding, you’ll be able to create a set of time-aligned video streams, each with a unique bitrate and frame size, while changing the Speex audio to AAC audio. This group of streams is internet-pleasant, allowing you reach virtually any screen on the planet.

How is Video Transcoding Finished?

Video begins life in a format unique to the camera or program used to seize your images and sounds. This is typically not the format wanted to deliver the video online or play it from another device. Video transcoding is used to change the original format into one permitting the video and audio to play properly on a person’s devices — 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 Codecs and File Types in Video Transcoding?

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

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

Video and audio codec codecs confer with the applied sciences used to both create and play back the digital video and audio.

Examples of file types are MPEG-four (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 want to use, and whether your video file should be transformed to a supported format.

DaCast, for instance, requires an MPEG-four (MP4) file format with an H.264 video codec. Windows Media Video (WMV) files are Advanced Systems Format (.asf) files that embody 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, permitting you to store better quality video for a similar file size. A great video transcoding program shall be able to convert multiple file codecs and codecs.

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