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 bounce to 15.2 exabytes in 2018. Without knowing the precise numbers, it is safe to say the demand and development will continue.

For those who’re involved with streaming media, you either know all about video transcoding, otherwise you’re wondering why you keep hearing about it. For those who aren’t sure you want it, that places you within the second camp. An understanding of video transcoding and how one can do it is critical for any success with streaming video; particularly if you must 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 movie data files. This entails translating all three elements of a digital video at the identical time — the file format, the video, and the audio.

This is a vital operate when a target device does not help the current 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 transform incompatible or obsolete data to a better-supported, read newer, video format.

Why is Transcoding Critical?

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

For instance, you’re preparing to do a live stream from your office. It’s a possibility that you simply’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 will probably be delivered live to on-line viewers; however, an attempt to 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.

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 nearly anyone with slower data speeds, tablets, and mobile phones.

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

How is Video Transcoding Executed?

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 unique format into one permitting the video and audio to play properly on a user’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 Codecs and File Types in Video Transcoding?

When talking about video transcoding, we refer to file codecs, file types, and something called codecs.

Video format specifies how video and audio have been mixed and tells playback devices how you can play the files.

Video and audio codec codecs refer to the technologies 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 codecs and codecs are supported by the platform you want to use, and whether or not your video file have to 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 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, permitting you to store higher quality video for a similar file size. A superb video transcoding program will probably be able to convert multiple file codecs and codecs.

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