When converting sub to srt, we need to know the frame rate. The dialogue inside a MicroDVD file is timed based on the frame rate of the video. MicroDVD subtitle files are weird, but for some reason still common. Smi files support multiple languages in the same subtitle file, which should work fine when converting to srt. Korea used to use the smi format to create subtitles for movies, most old Korean movies that come with subtitles use the smi format. Smi files are barely ever used these days because there are far superior alternatives like srt or ass.

Synchronized Accessible Media Interchange (sami or smi) is an old subtitle format originally created by Microsoft. If the file does not start with this tag, converting it will probably fail, or result in incorrect output. The first line of a WebVTT file should start with WEBVTT. vtt file extension and are a plain text subtitle format. Since these effects are not supported by srt, they are stripped when converting vtt to srt. WebVTT supports styling on text, positioning and karaoke effects. It is similar to the srt format in many ways.

Web Video Text Tracks Format (WebVTT) is a modern subtitle format used for online video subtitles. You can learn more about the ssa and ass format on the Wikipedia page. Srt doesn't support any of these things, and when converting ass to srt, all these effects are either removed or changed to normal text.Ĭhanging ass files to srt files usually works pretty well, except for the occasional overlapping text as a result of removing text position effects. It supports many effects, a few examples are custom fonts, pictures, positioned text, colors, moving text and karaoke text. You can learn more about the subrip format here.Īdvanced Substation Alpha (ass) is, as the name says, a more advanced version of the Substation Alpha (ssa) format. The paragraphs below describe what you can expect when converting your subtitles to srt. This free online format converter works with Windows, Mac (Apple) and Linux and doesn't require you to install freeware on your computer. Subrip (srt) is a very basic subtitle format, because of this you will almost always lose some functionality or effects when converting to srt.

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