fix: Enable stdout output for CEA-708 captions on Windows

[cfsmp3]

Summary

Fixes #1693 - ccextractorwinfull.exe can't print captions to stdout

The CEA-708 decoder crashed on Windows when using --stdout because the dtvcc_writer was not properly initialized for stdout output.

Changes

1. Fixed Windows stdout handle initialization (ccx_encoders_common.c):

   • Use GetStdHandle(STD_OUTPUT_HANDLE) instead of NULL for fhandle
   • This allows the Rust writer to detect stdout mode properly

2. Changed env_logger target from Stdout to Stderr (lib.rs):

   • Debug messages no longer pollute stdout when using --stdout
   • This prevents mixing debug output with subtitle content

3. Removed redundant debug statement (service_decoder.rs):

   • The bare debug!("{}", self.current_window) was noisy and duplicated by a more detailed debug statement below it

Test plan

• All 270 Rust tests pass
• Added test_writer_output_with_valid_fd - verifies stdout mode works when fd is pre-set
• Added test_writer_output_missing_filename_and_fd - verifies proper error handling (not panic)
• Verified subtitles extract correctly to stdout on Linux
• Windows fix uses proper GetStdHandle(STD_OUTPUT_HANDLE) API

🤖 Generated with Claude Code

[syehoonkim]

@cfsmp3 Thanks for fixing this issue. It looks like there are still some conflicts, and I’m wondering if you plan to resolve them. Thanks again.

[ccextractor-bot]

CCExtractor CI platform finished running the test files on windows. Below is a summary of the test results, when compared to test for commit a0809ca...:

Report Name	Tests Passed
Broken	13/13
CEA-708	8/14
DVB	7/7
DVD	3/3
DVR-MS	2/2
General	27/27
Hardsubx	0/1
Hauppage	3/3
MP4	3/3
NoCC	10/10
Options	77/86
Teletext	17/21
WTV	12/13
XDS	34/34

NOTE: The following tests have been failing on the master branch as well as the PR:

• ccextractor --service 1 --out=txt --no-bom --no-rollup ea83ff7bcb..., Last passed:

  Test 6869

• ccextractor --service 1 --out=txt --no-bom --no-rollup b5d6aad89f..., Last passed:

  Test 6869

• ccextractor --service 1[EUC-KR] --out=txt --no-rollup b5d6aad89f..., Last passed:

  Test 6869

• ccextractor --service 1[EUC-KR] b5d6aad89f..., Last passed:

  Test 6869

• ccextractor --service 1[EUC-KR] --no-rollup b5d6aad89f..., Last passed:

  Test 6869

• ccextractor --service all[EUC-KR] b5d6aad89f..., Last passed:

  Test 6869

• ccextractor --hardsubx 1a0302f7fd..., Last passed:

  Test 6819

• ccextractor --in=bin 988d4e8bba..., Last passed:

  Test 6729

• ccextractor --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 6895

• ccextractor --startcreditsnotbefore 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 6895

• ccextractor --startcreditsnotafter 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 6895

• ccextractor --startcreditsforatleast 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 6895

• ccextractor --startcreditsforatmost 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 6895

• ccextractor --endcreditstext "CCextractor Ends crdit Testing" addf5e2fc9..., Last passed:

  Test 6895

• ccextractor --endcreditsforatleast 3 --endcreditstext "CCextractor Ends crdit Testing" addf5e2fc9..., Last passed:

  Test 6895

• ccextractor --endcreditsforatmost 2 --endcreditstext "CCextractor Ends crdit Testing" addf5e2fc9..., Last passed:

  Test 6895

• ccextractor --autoprogram --out=ttxt --latin1 --datets dcada745de..., Last passed:

  Test 6895

• ccextractor --autoprogram --out=srt --latin1 --tpage 398 5d5838bde9..., Last passed:

  Test 6819

• ccextractor --autoprogram --out=srt --latin1 --tpage 299 44c45593fb..., Last passed:

  Test 6825

• ccextractor --autoprogram --out=srt --latin1 --teletext --tpage 398 3b276ad8bf..., Last passed:

  Test 6819

• ccextractor --out=srt --latin1 d7e7dbdf68..., Last passed:

  Test 6895

All tests passing on the master branch were passed completely.

Check the result page for more info.