[QUESTION] - Scenarist Closed Caption (SCC) Input support

[bbgdzxng1]

CCExtractor version: 0.88

In raising this issue, I confirm the following:

• I have read and understood the contributors guide.
• I have checked that the bug-fix I am reporting can be replicated, or that the feature I am suggesting isn't already present.
• I have checked that the issue I'm posting isn't already reported.
• I have checked that the issue I'm porting isn't already solved and no duplicates exist in closed issues and in opened issues
• I have checked the pull requests tab for existing solutions/implementations to my issue/suggestion.
• I have used the latest available version of CCExtractor to verify this issue exists.
• I have ticked all the boxes in this section and to prove it I'm deleting the section completely to remove boilerplate text.

Additional information

What is the recommended method to input SCC files into ccextractor on a non-Windows platform?

I can see that ccextrator can accept McPoodle Raw format...

Input formats:
       With the exception of McPoodle's raw format, which is just the closed
       caption data with no other info, CCExtractor can usually detect the
       input format correctly.

Therefore '-in=raw' would be the appropriate format.

The challenge is then how to get the SCC files into McPoodle raw format in a non-Windows environment. McPoodle includes SCC2RAW.exe (Windows Binary), but McPoodle's project is only compiled for Windows.

The ccextractor FAQ suggests that the ccextractor team ported McPoodle's code... "Lots of code came originally from McPoodle's tools (even though it was ported from Perl to C)", and ccextractor is thankfully cross-platform. Did the result of this porting process expose an SCC2RAW method in a way that could be used to allow scc as an input into ccextractor?

(or does anyone know of a cross-platform port of McPoodle suite which I may have missed?)

Thanks for a great tool.

[bbgdzxng1]

Resolved by running SCCTOOL's perl script rather than the Windows binary.

[cfsmp3]

Let's leave this open if there's a problem with it :-)

[bbgdzxng1]

Worked perfectly for SCC > Raw > SRT using SCC_TOOLS per scripts on macOS

$ curl --silent --location --request GET "https://archive.org/download/cc_sample/cc_sample.scc" -o cc_sample.scc
$ dos2unix --newfile cc_sample.scc cc_sample_dos2unix.scc
$ perl scc2raw.pl cc_sample_dos2unix.scc cc_sample_dos2unix.bin
$ ccextractor -debug -in=raw -out=srt -utf8 cc_sample_dos2unix.bin -o cc_sample_dos2unix.srt
CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke.
Teletext portions taken from Petr Kutalek's telxcc
--------------------------------------------------------------------------
Input: Files (1): cc_sample_dos2unix.bin
[Extract: 1] [Stream mode: McPoodle's raw]
[Program : Auto ] [Hauppage mode: No] [Use MythTV code: Auto]
[Timing mode: Auto] [Debug: Yes] [Buffer input: No]
[Use pic_order_cnt_lsb for H.264: No] [Print CC decoder traces: No]
[Target format: .srt] [Encoding: UTF-8] [Delay: 0] [Trim lines: No]
[Add font color data: Yes] [Add font typesetting: Yes]
[Convert case: No] [Video-edit join: No]
[Extraction start time: not set (from start)]
[Extraction end time: not set (to end)]
[Live stream: No] [Clock frequency: 90000]
[Teletext page: Autodetect]
[Start credits text: None]
[Quantisation-mode: CCExtractor's internal function]

-----------------------------------------------------------------
Opening file: cc_sample_dos2unix.bin
Analyzing data in McPoodle raw mode


Total frames time:	  00:00:00:000  (0 frames at 29.97fps)

Min PTS:				00:00:00:001
Max PTS:				00:01:09:070
Length:				 00:01:09:069
Done, processing time = 0 seconds
Issues? Open a ticket here
https://github.com/CCExtractor/ccextractor/issues
$ head -n20 cc_sample_dos2unix.srt 
1
00:00:09,243 --> 00:00:12,378
                  Is that what  
                  the Americans 
                  call doodling?

2
00:00:12,413 --> 00:00:13,278
It is more serious              

3
00:00:13,314 --> 00:00:16,081
than you could                  
possibly realize                
Charlotte                       

4
00:00:20,221 --> 00:00:21,020
Good

This one should be ok to close, as the above flow worked for SCC > RAW> SRT.

There was an issue for SCC > RAW > VTT, which I have opened under its own ticket, because it is specific to VTT. #1294

Thanks!

[cfsmp3]

Current Status:

CCExtractor can output SCC format but doesn't currently support SCC as an input format.

The workaround using SCC_TOOLS works:

1. Convert SCC to raw: perl scc2raw.pl input.scc output.bin
2. Process with ccextractor: ccextractor --in=raw --out=srt output.bin

SCC_TOOLS: https://github.com/pbs/scc_tools

Note: We recently fixed McPoodle's raw format read/write in PR #1843, so the raw → SRT step should work reliably now.

Planned:

Native SCC input support is now planned as a feature. Relabeling this issue as a feature request to track the implementation.