SRT to SCC Subtitle Converter
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Supports .srt files up to 50 MB
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Upload SRT File
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Each file can be up to 50 MB. Batches can contain up to 200 files or 1 GB total.
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Works on Windows, Mac, Linux, iOS, Android - any modern browser.
Free Online SRT to SCC Converter
Our SRT to SCC converter encodes plain-text SubRip subtitles into Scenarist Closed Captioning format, which is widely used in North American broadcast caption workflows. The converter transforms supported basic ASCII text into hex-encoded CEA-608 byte pairs, converts SRT timestamps (HH:MM:SS,mmm) to SMPTE timecodes (HH:MM:SS:FF at 29.97fps), inserts pop-on caption control codes, and adds the required Scenarist_SCC V1.0 header. Review the output before professional caption delivery.
Input Format
SRTSRT (SubRip) is the most universally supported subtitle format. Each entry has a sequential index number, a timestamp line in HH:MM:SS,mmm --> HH:MM:SS,mmm format (comma before milliseconds, arrow separating start and end), and subtitle text. SRT files are plain text and recognized by virtually every media player, smart TV, video editor, and streaming platform.
Output Format
SCCSCC (Scenarist Closed Captioning) is a long-standing format for delivering closed captions to North American broadcast television and some streaming workflows. SCC files encode CEA-608 (Line 21) caption data as hexadecimal byte pairs, paired with SMPTE timecodes in HH:MM:SS:FF format (hours:minutes:seconds:frames at 29.97 fps). The file starts with a header line (Scenarist_SCC V1.0) followed by timecode-tab-data triplets. Because caption text is hex-encoded, SCC files are not human-readable without a decoder.
Features
Why Convert?
Format Differences
Common Use Cases
Broadcast Caption Delivery
Produce SCC files from SRT subtitles for delivery to television networks, cable operators, and broadcast playout systems that require CEA-608 captioning.
Streaming Platform Compliance
Generate SCC when a streaming platform explicitly accepts it, and confirm the current delivery specification.
FCC Caption Compliance
Create SCC as part of a caption-compliance workflow; professional delivery requires final specification checks.
Broadcast Automation
Feed subtitle content into broadcast automation and playout systems that read SCC format but cannot import plain-text SRT files.
Caption Archival
Store subtitle content in the broadcast-standard SCC format for long-term archival in professional media asset management systems.
Captioning Pipeline
Integrate SCC encoding into subtitle production pipelines where SRT is used for editing and SCC is required for final delivery.
Related Formats
SRT (SubRip)
The input format: universal plain-text subtitles readable by all media players and editors.
VTT (WebVTT)
The web alternative: if you also need web-ready captions, convert SRT to VTT in parallel with SCC.
STL (Spruce Subtitle)
The Spruce text alternative: use SRT to STL for workflows that expect Spruce STL rather than SCC.
Frequently Asked Questions
SCC (Scenarist Closed Captions) is a standard format for Line 21 closed captioning used in North American broadcast television. It encodes caption data as hexadecimal byte pairs that map to CEA-608 caption commands. Individual networks and delivery systems define their current intake requirements.
CEA-608 (formerly EIA-608) is the North American standard for Line 21 television closed captions. SCC files encode CEA-608 commands including pop-on, paint-on, and roll-up caption modes, channel selection (CC1-CC4), and character sets for English, Spanish, and French.
SCC supports three CEA-608 caption modes: Pop-On (captions appear as complete blocks), Paint-On (characters appear one by one), and Roll-Up (captions scroll up line by line). The converter defaults to Pop-On mode, which is closest to how SRT cues display.
SRT stores subtitle text as readable plain text with human-readable timestamps. SCC encodes caption data as hexadecimal byte pairs (like 9152 91ae 9120 9120) that represent CEA-608 control codes and characters. The converter translates between these fundamentally different encoding systems.
SRT timestamps (HH:MM:SS,mmm) are converted to SCC timecodes in HH:MM:SS:FF format, where FF is the frame number at 29.97 fps. Millisecond precision is quantized to the nearest represented frame within the second.
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