[BUG] Apple ProRes MOV with CEA-608 track has wrong offset #501

New Issue

claunia · 2026-01-29T16:45:27Z

claunia commented

2026-01-29 16:45:27 +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 16:45:27 +00:00

claunia closed this issue

2026-01-29 16:45:27 +00:00

claunia commented

2026-01-29 16:45:28 +00:00

@cfsmp3 commented on GitHub (Nov 8, 2019):

@rayfoss does this happen with all files, or just a specific one?
Of all of them, is it all of them in general or all of them only if they come from Final Cut?
Do the subs play in sync when played with VLC or ffplay?

@cfsmp3 commented on GitHub (Nov 8, 2019): @rayfoss does this happen with all files, or just a specific one? Of all of them, is it all of them in general or all of them only if they come from Final Cut? Do the subs play in sync when played with VLC or ffplay?

claunia commented

2026-01-29 16:45:28 +00:00

@FossPrime commented on GitHub (Nov 8, 2019):

Happened with all of them... They all come from final cut. We needed to use
that format for DVD authoring :/

On Fri., Nov. 8, 2019, 13:08 Carlos Fernandez Sanz, <
notifications@github.com> wrote:

@rayfoss https://github.com/rayfoss does this happen with all files, or
just a specific one?
Of all of them, is it all of them in general or all of them only if they
come from Final Cut?
Do the subs play in sync when played with VLC or ffplay?

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@FossPrime commented on GitHub (Nov 8, 2019): Happened with all of them... They all come from final cut. We needed to use that format for DVD authoring :/ On Fri., Nov. 8, 2019, 13:08 Carlos Fernandez Sanz, < notifications@github.com> wrote: > @rayfoss <https://github.com/rayfoss> does this happen with all files, or > just a specific one? > Of all of them, is it all of them in general or all of them only if they > come from Final Cut? > Do the subs play in sync when played with VLC or ffplay? > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > <https://github.com/CCExtractor/ccextractor/issues/1095?email_source=notifications&email_token=AAGV4LHDK2PGCCTB7YP3LOTQSW2MTA5CNFSM4HXSXVNKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEDTCEWI#issuecomment-551952985>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AAGV4LFIXBTKLC7YSXBESXLQSW2MTANCNFSM4HXSXVNA> > . >

claunia commented

2026-01-29 16:45:28 +00:00

@cfsmp3 commented on GitHub (Nov 8, 2019):

But is this problem specific to CCExtractor or also common to VLC, etc?
Maybe final pro is just breaking the 608 data?

On Fri, Nov 8, 2019 at 11:30 AM Ray Foss notifications@github.com wrote:

Happened with all of them... They all come from final cut. We needed to use
that format for DVD authoring :/

On Fri., Nov. 8, 2019, 13:08 Carlos Fernandez Sanz, <
notifications@github.com> wrote:

@rayfoss https://github.com/rayfoss does this happen with all files,
or
just a specific one?
Of all of them, is it all of them in general or all of them only if they
come from Final Cut?
Do the subs play in sync when played with VLC or ffplay?

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Reply to this email directly, view it on GitHub
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,
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<
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@cfsmp3 commented on GitHub (Nov 8, 2019): But is this problem specific to CCExtractor or also common to VLC, etc? Maybe final pro is just breaking the 608 data? On Fri, Nov 8, 2019 at 11:30 AM Ray Foss <notifications@github.com> wrote: > Happened with all of them... They all come from final cut. We needed to use > that format for DVD authoring :/ > > On Fri., Nov. 8, 2019, 13:08 Carlos Fernandez Sanz, < > notifications@github.com> wrote: > > > @rayfoss <https://github.com/rayfoss> does this happen with all files, > or > > just a specific one? > > Of all of them, is it all of them in general or all of them only if they > > come from Final Cut? > > Do the subs play in sync when played with VLC or ffplay? > > > > — > > You are receiving this because you were mentioned. > > Reply to this email directly, view it on GitHub > > < > https://github.com/CCExtractor/ccextractor/issues/1095?email_source=notifications&email_token=AAGV4LHDK2PGCCTB7YP3LOTQSW2MTA5CNFSM4HXSXVNKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEDTCEWI#issuecomment-551952985 > >, > > or unsubscribe > > < > https://github.com/notifications/unsubscribe-auth/AAGV4LFIXBTKLC7YSXBESXLQSW2MTANCNFSM4HXSXVNA > > > > . > > > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <https://github.com/CCExtractor/ccextractor/issues/1095?email_source=notifications&email_token=ABNMTWNCZ5VN3RZXYP2PJFLQSW44XA5CNFSM4HXSXVNKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEDTD5AY#issuecomment-551960195>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ABNMTWMXBAP3DM2Q4B5CPP3QSW44XANCNFSM4HXSXVNA> > . >

claunia commented

2026-01-29 16:45:28 +00:00

@FossPrime commented on GitHub (Nov 9, 2019):

Quicktime is the only player I know who can read it... aside from compressor/final cut. Which is extra lame. When it does, it is accurate... I can also use compressor to convert them, those are also accurate... But that's all apple stuff that won't scale

@FossPrime commented on GitHub (Nov 9, 2019): Quicktime is the only player I know who can read it... aside from compressor/final cut. Which is extra lame. When it does, it is accurate... I can also use compressor to convert them, those are also accurate... But that's all apple stuff that won't scale

claunia commented

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

@FossPrime commented on GitHub (Nov 9, 2019):

I would agree... if Quicktime and every Apple product that supports it didn't work seamlessly :/

@FossPrime commented on GitHub (Nov 9, 2019): I would agree... if Quicktime and every Apple product that supports it didn't work seamlessly :/

claunia commented

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

@cfsmp3 commented on GitHub (Dec 20, 2025):

@FossPrime Do you still have this sample, or any other with the same problem?

@cfsmp3 commented on GitHub (Dec 20, 2025): @FossPrime Do you still have this sample, or any other with the same problem?

claunia commented

2026-01-29 16:45:30 +00:00