[QUESTION] what's the problem with my raw 708 data from vanc? (No captions were found in input.) #672

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claunia · 2026-01-29T16:50:37Z

claunia commented

2026-01-29 16:50:37 +00:00

Originally created by @emcodem on GitHub (Dec 22, 2021).

CCExtractor version: Version: 0.93

Is this a regression (i.e. did it work before)? {NO}
What platform did you use? {Window}
What were the used arguments? ccextractorwinfull.exe -608 -in=raw C:\temp\vanc.bin -o c:\temp\out.srt

Additional information

This is a raw dump of ancillary packets recorded from Blackmagic Decklink SDI, the captions were inserted by FAB subtitler.
When i feed it to ccextractor, the stuff seems to be autodetected as 608 instead of 708, also i get "No captions were found in input" but the debug log shows someting at least.
For example (from 608 debug):

~- ~Ch~ar~ma~nt~e ~Un~te~rt~it~ezzzQengA?t^@f
PAC: 16 69  --  Position: 8:0, color: red,  font: underlined

The part "Charmante Untertite" is actually one part of the subtitles i was looking for.
Is this a problem with the data format of my raw file or more like missing functionality in the 608/708 decoders?
vanc.zip

Originally created by @emcodem on GitHub (Dec 22, 2021). CCExtractor version: Version: 0.93 - Is this a regression (i.e. did it work before)? {NO} - What platform did you use? {Window} - What were the used arguments? `ccextractorwinfull.exe -608 -in=raw C:\temp\vanc.bin -o c:\temp\out.srt` # Additional information This is a raw dump of ancillary packets recorded from Blackmagic Decklink SDI, the captions were inserted by FAB subtitler. When i feed it to ccextractor, the stuff seems to be autodetected as 608 instead of 708, also i get "No captions were found in input" but the debug log shows someting at least. For example (from 608 debug): ``` ~- ~Ch~ar~ma~nt~e ~Un~te~rt~it~ezzzQengA?t^@f PAC: 16 69 -- Position: 8:0, color: red, font: underlined ``` The part "Charmante Untertite" is actually one part of the subtitles i was looking for. Is this a problem with the data format of my raw file or more like missing functionality in the 608/708 decoders? [vanc.zip](https://github.com/CCExtractor/ccextractor/files/7764404/vanc.zip)

claunia added the enhancement label 2026-01-29 16:50:37 +00:00

claunia closed this issue

2026-01-29 16:50:38 +00:00

claunia commented

2026-01-29 16:50:38 +00:00

@canihavesomecoffee commented on GitHub (Jan 14, 2022):

Sample mirrored here: https://sampleplatform.ccextractor.org/sample/180

@canihavesomecoffee commented on GitHub (Jan 14, 2022): Sample mirrored here: https://sampleplatform.ccextractor.org/sample/180

claunia commented

2026-01-29 16:50:39 +00:00

@cfsmp3 commented on GitHub (Dec 26, 2025):

Current Status:

CCExtractor's --in=raw mode expects McPoodle's raw EIA-608 format, not raw VANC (Video Ancillary) data packets from SDI capture.

VANC data is currently supported when embedded in container formats like MXF or GXF, but not as raw binary dumps from capture cards like Blackmagic Decklink.

Planned:

We're adding this as an approved feature request for native raw VANC input support. Since we have the sample available on the sample platform, we'll look into implementing this.

In the meantime, if you need a workaround, you could try wrapping the SDI capture into an MXF container using FFmpeg, which CCExtractor can then process.

Relabeling as enhancement/feature request.

@cfsmp3 commented on GitHub (Dec 26, 2025): **Current Status:** CCExtractor's `--in=raw` mode expects McPoodle's raw EIA-608 format, not raw VANC (Video Ancillary) data packets from SDI capture. VANC data is currently supported when embedded in container formats like MXF or GXF, but not as raw binary dumps from capture cards like Blackmagic Decklink. **Planned:** We're adding this as an approved feature request for native raw VANC input support. Since we have the sample available on the sample platform, we'll look into implementing this. In the meantime, if you need a workaround, you could try wrapping the SDI capture into an MXF container using FFmpeg, which CCExtractor can then process. Relabeling as enhancement/feature request.

claunia referenced this issue

2026-01-29 17:16:49 +00:00

[PR #672] [MERGED] Delete .DS_Store files and add it to .gitignore file #1509

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Reference: starred/ccextractor#672