[PR #1978] [MERGED] Add support for raw CDP (Caption Distribution Packet) files #2778

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claunia · 2026-01-29T17:23:51Z

claunia commented

2026-01-29 17:23:51 +00:00

📋 Pull Request Information

Original PR: https://github.com/CCExtractor/ccextractor/pull/1978
Author: @cfsmp3
Created: 1/4/2026
Status: ✅ Merged
Merged: 1/5/2026
Merged by: @cfsmp3

Base: master ← Head: feat/issue-1406-raw-cdp-support

📝 Commits (6)

ddf2967 Fix MXF files containing CEA-708 captions not being detected/extracted
04ed95f Fix MXF files containing CEA-708 captions not being detected/extracted
41fb966 Add support for raw CDP (Caption Distribution Packet) files
9004155 Fix Rust formatting and clippy issues
b4d8e0f Trigger CI
8692572 Merge remote-tracking branch 'origin/master' into feat/issue-1406-raw-cdp-support

📊 Changes

2 files changed (+120 additions, -9 deletions)

View changed files

📝 src/lib_ccx/general_loop.c (+115 -1)
📝 src/rust/build.rs (+5 -8)

📄 Description

Summary

Adds support for processing raw CDP files captured from SDI VANC data
CDP packets (from capture cards like Blackmagic Decklink) are automatically detected by their 0x9669 identifier when using -in=raw
Extracts and processes both CEA-608 and CEA-708 captions from CDP packets

Dependencies

⚠️ This PR depends on #1977 (MXF CEA-708 fix) which adds the ccxr_dtvcc_set_active function used here.

Changes

Added process_raw_cdp() function to parse concatenated CDP packets
Added CDP format detection in raw_loop() (checks for 0x9669 header)
Extracts cc_data triplets from CDP and processes through process_cc_data()
Calculates timing based on CDP frame rate and packet count

Usage

ccextractor -in=raw captured_vanc.bin -o output.srt

Test plan

Tested with sample from issue #1406 (sample 180 on sample platform)
CDP format is correctly detected and parsed
Build passes successfully

Note: The sample on the sample platform contains only null caption data (no actual text content), but the parsing and detection works correctly.

Fixes #1406

🤖 Generated with Claude Code

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/CCExtractor/ccextractor/pull/1978 **Author:** [@cfsmp3](https://github.com/cfsmp3) **Created:** 1/4/2026 **Status:** ✅ Merged **Merged:** 1/5/2026 **Merged by:** [@cfsmp3](https://github.com/cfsmp3) **Base:** `master` ← **Head:** `feat/issue-1406-raw-cdp-support` --- ### 📝 Commits (6) - [`ddf2967`](https://github.com/CCExtractor/ccextractor/commit/ddf29672fd5aad970a2c832fc62487eedda378a6) Fix MXF files containing CEA-708 captions not being detected/extracted - [`04ed95f`](https://github.com/CCExtractor/ccextractor/commit/04ed95f8b59fa327c30380ecdef8a7649b4a02ba) Fix MXF files containing CEA-708 captions not being detected/extracted - [`41fb966`](https://github.com/CCExtractor/ccextractor/commit/41fb966f6f71e999e7a1791ec1a2af29d6ef3c4f) Add support for raw CDP (Caption Distribution Packet) files - [`9004155`](https://github.com/CCExtractor/ccextractor/commit/90041554a375a6f651b493772ebf5088f3b82a47) Fix Rust formatting and clippy issues - [`b4d8e0f`](https://github.com/CCExtractor/ccextractor/commit/b4d8e0ffaf14bcd69f24e8ecb59d8b1e7d903a0c) Trigger CI - [`8692572`](https://github.com/CCExtractor/ccextractor/commit/86925727e035882e1b39e83b5f099a88c49db2c2) Merge remote-tracking branch 'origin/master' into feat/issue-1406-raw-cdp-support ### 📊 Changes **2 files changed** (+120 additions, -9 deletions) <details> <summary>View changed files</summary> 📝 `src/lib_ccx/general_loop.c` (+115 -1) 📝 `src/rust/build.rs` (+5 -8) </details> ### 📄 Description ## Summary - Adds support for processing raw CDP files captured from SDI VANC data - CDP packets (from capture cards like Blackmagic Decklink) are automatically detected by their `0x9669` identifier when using `-in=raw` - Extracts and processes both CEA-608 and CEA-708 captions from CDP packets ## Dependencies ⚠️ **This PR depends on #1977** (MXF CEA-708 fix) which adds the `ccxr_dtvcc_set_active` function used here. ## Changes - Added `process_raw_cdp()` function to parse concatenated CDP packets - Added CDP format detection in `raw_loop()` (checks for `0x9669` header) - Extracts cc_data triplets from CDP and processes through `process_cc_data()` - Calculates timing based on CDP frame rate and packet count ## Usage ``` ccextractor -in=raw captured_vanc.bin -o output.srt ``` ## Test plan - [x] Tested with sample from issue #1406 (sample 180 on sample platform) - [x] CDP format is correctly detected and parsed - [x] Build passes successfully Note: The sample on the sample platform contains only null caption data (no actual text content), but the parsing and detection works correctly. Fixes #1406 🤖 Generated with [Claude Code](https://claude.com/claude-code) --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

claunia added the pull-request label 2026-01-29 17:23:51 +00:00

claunia closed this issue

2026-01-29 17:23:52 +00:00

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Reference: starred/ccextractor#2778