Introduction to Transmuxing, Transcoding, Transrating

Transcoding:

If a file format is not supported by a system, transcoding comes into the picture by helping you out in such a situation.  Transcoding is all about conversion of file format from one analog-to-analog file or digital-to-digital file to another file format. While if we discuss about video transcoding i.e. process of converting a video file from one format to another. It is done to make the video content viewable across the different platforms and devices. Also, transcoding is performed when the target device does not support the format that the original data is in. Video transcoding is very useful to convert incompatible and obsolete files types into modern format (supported by new devices). Transcoding has become popular as it is helpful over video sharing websites. transcode the video data into one of the formats that are well supported by the particular website or if needed your own website.

Though, each time file is transcoded, there is loss in quality. that is a reason why transcoding is often termed as a lossy process. If the input compression is losslessly and the output is uncompressed or losslessly compressed, transcoding can be lossless.

The other important use of Transcoding is to fit HTML and Graphic files to the unique Mobile Device constraint and also to other Web-enabled products. This became constraint as these devices usually have smaller screen sizes, low memory and slow bandwidth rates. Here, transcoding is performed by a transcoding proxy server or device, which receives the requested document or file and uses a specified annotation to adapt it to the client.

Transrating:

The increased demand of video technologies like YouTube has increased the popularity of Transrating. To create different versions of video, a video file is changed from one bitrate to another. This process is terms as Transrating. We perform transrating via an encoder for Adaptive Bitrate System.  By the process of Transrating, the video or audio encoding format is not changed just a conversion of a file to a different bitrate happens. Transrating process enables the users to fit media content into much lesser storage space or well we can say make use of transrating to have efficient video delivery in reduced bandwidth.

Transmuxing:

Also known as Transcode-Multiplexing or re-packaging. It is a process that changes the media content file format while keeping majority of the streams containing information from the original. Transmuxing, converts a file to a different container format without changing the file contents. It supports Video On Demand transmission mode.