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 expected to rise to 9.6 exabytes in 2017 and bounce to 15.2 exabytes in 2018. Without knowing the exact numbers, it is safe to say the demand and development will continue.

If you’re involved with streaming media, you either know all about video transcoding, otherwise you’re wondering why you keep hearing about it. When you aren’t sure you need it, that places you within 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’s essential deliver streaming video to quite a lot of totally different devices.

What’s Video Transcoding?

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

This is a vital operate when a goal machine doesn’t assist the current format of your media, or has limited storage capacity that requires a reduced file size (think going from WMV to MP4). It is usually used to transform incompatible or out of date data to a greater-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical when you need your content to reach more end users.

For example, you’re making ready 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 deskprime 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 to stream it directly will have problems:

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

With a view to render the Speex audio, most people will need 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’ll be able to create a set of time-aligned video streams, every with a special bitrate and frame dimension, while changing 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 Achieved?

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 needed to deliver the video on-line or play it from one other device. Video transcoding is used to change the original format into one allowing the video and audio to play properly on a user’s gadgets — be they pc, tablet, smartphone, or tv.

Video encoding, or video transcoding, involves a -step process. First, the unique 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 refer to file formats, file types, and something called codecs.

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

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

DaCast, for example, 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 embrace 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 higher quality video for the same file size. An excellent video transcoding program might be able to transform a number of file codecs and codecs.

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