[BUG] Apple ProRes MOV with CEA-608 track has wrong offset #498

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claunia · 2026-01-29T16:45:24Z

claunia commented

2026-01-29 16:45:24 +00:00

Originally created by @FossPrime on GitHub (Jun 12, 2019).

I am an active contributor to CCExtractor.

Necessary information

What platform did you use? - [x] Linux

3 minute master file: https://storage.googleapis.com/learn-video/Testing/Teeny%20Test.zip
Raw subs track: raw eic track dump.zip

===============================================

This has stumped me. Decoding Final Cut CEA-608 from Master ProRes 422 MOV exports to srt WORKS fine... except the offset is all wrong... the subtitles start exactly at 00:00:01,569. In the sample video the subs should start showing 62550ms into the video... subs are early by a minute.

The only error is this:

Processing track 4, type=clcp subtype=c608
100%  |  59:33Processing track 5, type=text subtype=text
Unsupported track type text:text! Please report.
  0%  |  00:00
Unsupported track type text:text! Please report.
  3%  |  00:51

Full: https://pastebin.com/Y9gndLw4

Originally created by @FossPrime on GitHub (Jun 12, 2019). - [x] I am an active contributor to CCExtractor. **Necessary information** - What platform did you use? - [x] Linux 3 minute master file: https://storage.googleapis.com/learn-video/Testing/Teeny%20Test.zip Raw subs track: [raw eic track dump.zip](https://github.com/CCExtractor/ccextractor/files/3283236/raw.eic.track.dump.zip) =============================================== This has stumped me. Decoding Final Cut CEA-608 from Master ProRes 422 MOV exports to srt WORKS fine... except the offset is all wrong... the subtitles start exactly at 00:00:01,569. In the sample video the subs should start showing 62550ms into the video... subs are early by a minute. The only error is this: ``` Processing track 4, type=clcp subtype=c608 100% | 59:33Processing track 5, type=text subtype=text Unsupported track type text:text! Please report. 0% | 00:00 Unsupported track type text:text! Please report. 3% | 00:51 ``` Full: https://pastebin.com/Y9gndLw4

claunia added the difficulty: medium label 2026-01-29 16:45:24 +00:00

claunia referenced this issue

2026-01-29 17:15:42 +00:00

[PR #498] [CLOSED] I've begun to make the code more readable #1316

claunia referenced this issue

2026-01-29 17:15:43 +00:00

[PR #498] I've begun to make the code more readable #1321

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