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 jump to 15.2 exabytes in 2018. Without knowing the precise numbers, it is safe to say the demand and growth will continue.
In the event you’re concerned with streaming media, you either know all about video transcoding, or you’re wondering why you keep hearing about it. For those who aren’t positive you need it, that places you in the second camp. An understanding of video transcoding and tips on how to do it is critical for any success with streaming video; especially if you want to deliver streaming video to a variety of completely different devices.
What is Video Transcoding?
Video transcoding, typically called video encoding, is the conversion from one digital encoding format to another, akin to for movie data files. This involves translating all three elements of a digital video at the similar time — the file format, the video, and the audio.
This is a vital function when a target system does not assist 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 convert incompatible or obsolete data to a better-supported, read newer, video format.
Why is Transcoding Critical?
Video transcoding is critical while you want your content 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 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 will probably be delivered live to on-line viewers; nevertheless, an attempt to stream it directly may have problems:
These viewing without ample bandwidth won’t be able to view the stream — they’ll be watching the ‘buffering’ circle.
As a way 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 changing 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 Completed?
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 needed to deliver the video online 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 gadgets — be they laptop, tablet, smartphone, or tv.
Video encoding, or video transcoding, includes 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 consult with file formats, file types, and something called codecs.
Video format specifies how video and audio have been mixed and tells playback gadgets tips on 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 codecs and codecs are supported by the platform you want to use, and whether or not your video file must be converted to a supported format.
DaCast, for instance, 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 higher quality and compression over WMV, allowing you to store higher quality video for the same file size. An excellent video transcoding program can be able to convert multiple file codecs and codecs.
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