SUP File Documentation

Overview

Feature Value
File Extension .sup
Format Type Bitmap Subtitle Format
Used In Blu-Ray, DVD
File Purpose Storing subtitles as images
Compression Yes (Run-Length Encoding, RLE)
Image Color Indexed color
Transparency Support Yes
Resolution Support HD, Full HD, 4K, etc.
Frame Rate Varies with video content
Subtitle Layer Overlay on video content
Time-coded Yes
Editing Software Subtitle Edit, BDSup2Sub, etc.
Creation Method Automated tools or manual creation
MIME Type application/x-sup
Character Encoding Not applicable (Images, not text)
Supported Languages Any (language-independent)
Accessibility Features Depends on subtitle authoring
Interactivity No
Embeddable in Video Containers Yes (e.g., MKV)
Standardization No formal standard
Popularity Common in Blu-Ray authoring