subtitle Format
SUB File Format
MicroDVD Subtitle is a lightweight text subtitle format that anchors timing cues to video frame numbers rather than absolute timestamps. It is commonly paired with AVI movie rips and legacy media players.
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Technical Specifications
| Extensions | .sub |
| MIME Types | text/x-microdvd, text/plain |
| Category | Subtitle |
| Engine Tier | tier1-small-js |
| Magic Bytes / Sniffing | Container sniffing (ZIP / OLE2 / RIFF header inspection) |
| Opens With | VLC Media Player, Subtitle Edit, MPC-HC, Aegisub |
| Good For | Frame-locked subtitle timing synchronized with fixed frame-rate video files. |
| Not Recommended For | Variable frame-rate media or web video players expecting standard timestamp cues. |