The MKS files are generally known as Matroska files containing subtitles only. Although the Matroska is a general file container, it avoids to keep the information of specific formats. Since subtitles are being used in some of the audio or video containers, the Matroska is paying attention to store some common subtitle formats. It helps Matroska to be consistent with the growth rate. You need to follow the points as given below to store the subtitles in Matroska:
The “.mks”. extension will be used by Matroska file (containing only subtitles).
CodecPrivate is being used to store all codecs related information that is global to an entire stream.
Remove the Start and stop timestamps that are used in a timestamp native storage format. Instead, use the Blocks timestamp and Duration.
You can use anything with a transparent layer, including a video.
Common Subtitle Formats
Here are some brief notes about more common subtitle formats stored in Matroska:
The VobSub subtitle format is the first image subtitle format to import into Matroska. This format is generated by exporting the subtitles from a DVD. The tracks should be separated while storing in Matroska, if the VobSub consist of a set of multiple streams.
The SRT is the most simple and basic of all subtitle formats. It consists of four parts as given below:
A number which indicates the sequence of the subtitle.
Subtitle’s appearing and disappearing time on the screen.
The subtitle itself.
A blank line to indicate the start of a next subtitle.
Sub Station Alpha (SSA) is a file format used by the popular subtitle editor SubStation Alpha. The SSA subtitles are widely used by fansubbers. It has the ability to display modern features, e.g. karaoke, positioning, styling etc..
The World Wide Web Consortium (W3C) developed the WebVTT which is abbreviated as “Web Video Text Tracks Format”. This format is being used to mark up external text track resources in connection with the HTML element.
HDMV presentation graphics subtitles
The HDMV presentation graphics subtitle format (HDMV PGS) is a series of bitmaps and we can’t say it text at all. In the other words you can say it as just a timed sequence of graphic images. To extract the information, converting PGS to SRT is a necessary process.
HDMV text subtitles
The HDMV text is known as the textual subtitle format used on Blu-rays. Matroska only allows UTF-8 character set When stores the TextST subtitles.
Digital Video Broadcasting (DVB) subtitles
The DVB subtitle format was introduced for regulating the transmission and display of several languages subtitling on TV signals. A typical subtitling format would also allow any viewer to watch DVB subtitled transmissions, no matter what is the manufacturer of the transmission systems.