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 were 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 progress will continue.
For those who’re concerned with streaming media, you either know all about video transcoding, or you’re wondering why you keep hearing about it. Should you aren’t certain you need it, that places you in the second camp. An understanding of video transcoding and the best way to do it is critical for any success with streaming video; especially if you have to deliver streaming video to a variety of completely different devices.
What’s Video Transcoding?
Video transcoding, typically called video encoding, is the conversion from one digital encoding format to a different, akin to for film data files. This entails translating all three parts of a digital video at the similar time — the file format, the video, and the audio.
This is a vital function when a goal system doesn’t assist the current format of your media, or has limited storage capacity that requires a reduced file dimension (think going from WMV to MP4). Additionally it is used to transform incompatible or obsolete data to a greater-supported, read newer, video format.
Why is Transcoding Critical?
Video transcoding is critical when you want your content to achieve more end users.
For example, you’re getting ready to do a live stream from your office. It’s a possibility that you’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; nonetheless, an try and stream it directly will have problems:
These viewing without sufficient bandwidth won’t be able to view the stream — they’ll be watching the ‘buffering’ circle.
In order to render the Speex audio, most people will need 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’ll be able to create a set of time-aligned video streams, each with a distinct 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 Performed?
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 wanted to deliver the video on-line or play it from one other device. Video transcoding is used to vary 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, entails a two-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 discuss with file codecs, file types, and something called codecs.
Video format specifies how video and audio have been mixed and tells playback devices how to play the files.
Video and audio codec codecs confer with the technologies used to each 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 want to use, and whether your video file must be transformed to a supported format.
DaCast, for example, 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 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 a similar file size. A great video transcoding program will be able to transform a number of file formats and codecs.
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