- run_ffmpeg stops the process from ONE exit path (`except BaseException`), so
an exception out of on_progress (a DB write) can no longer orphan a live
ffmpeg after a 10s join on its pipes; _stop is now a no-op on a dead process
- both run_ffmpeg callbacks are throttled to ~1s (they were a DB round-trip per
output line: ~10^5 queries on a long re-encode), mirroring the download hook
- volume arithmetic extracted to lib/playerVolume with unit tests; a corrupt
level now falls back to the LAST GOOD one instead of full blast, and the
sanitising happens where the stored value enters
- RSS is back to two except clauses (the shared tail already sits after the try)
- new tests: callback-exception cleanup, the two throttles; the fake Popen grew
poll() and its wait count is now asserted
Mutation-checked: each new group goes red when its fix is reverted.
peter
c4942eb590