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feat(capture): crash-safe rolling chunk recording#124
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Rewrite record_session() to write 8s MP4 chunks on-the-fly instead of one big file. Each chunk is released before the next starts, so a crash only loses the current partial chunk. Stop mechanism uses a sentinel file (.stop_recording) instead of Ctrl+C, which doesn't work reliably from Claude Code's Bash tool. - Add stop_recording() helper and `capture_fio.py stop` CLI subcommand - Update visual_test_loop.py run_session() to use rolling chunks directly - Include sim controllers and cookoff source files Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
record_session()to write rolling 8-second MP4 chunks instead of one big file — each chunk is a complete, valid MP4cookoff/clips/.stop_recording) so recording can be stopped from a separate process (no Ctrl+C needed)capture_fio.py stopCLI subcommand andstop_recording()helpervisual_test_loop.pyto consume rolling chunks directly (no post-hoc chunking for live sessions)Test plan
capture_fio.py stop— exits cleanlyvisual_test_loop.py --session🤖 Generated with Claude Code