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 have been to be consumed on mobile platforms. It was anticipated to rise to 9.6 exabytes in 2017 and soar to 15.2 exabytes in 2018. Without knowing the exact numbers, it is safe to say the demand and growth will continue.

For those who’re involved 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 need it, that places you in the second camp. An understanding of video transcoding and the way to do it is critical for any success with streaming video; especially if you want to deliver streaming video to a wide range of completely different devices.

What’s Video Transcoding?

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

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 It’s also used to transform incompatible or out of date data to a better-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical once you want your content material to achieve more end users.

For example, you’re making ready to do a live stream from your office. It’s a possibility that you simply’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 might be delivered live to online viewers; however, an attempt to stream it directly can have problems:

Those viewing without sufficient 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 people might want to watch using Flash Player on a computer. Now you’ve just excluded virtually 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 distinct bitrate and frame dimension, while converting the Speex audio to AAC audio. This group of streams is internet-friendly, allowing you attain virtually any screen on the planet.

How is Video Transcoding Accomplished?

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

Video encoding, or video transcoding, includes a two-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 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 how to play the files.

Video and audio codec codecs discuss with the technologies used to both 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 codecs 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-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 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 higher quality video for a similar file size. A very good video transcoding program will probably be able to convert multiple file formats and codecs.

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