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b12e3ff367
Implemented EnableTranscodingCancellation configuration option to control whether FFmpeg transcoding processes can be interrupted when client requests are cancelled. This addresses resource management issues on low-power hardware where transcoding processes would accumulate and cause CPU spikes. Key changes: - Added EnableTranscodingCancellation bool to configuration (default: false) - Added CLI flag --enabletranscodingcancellation and TOML/env support - Modified FFmpeg package to always use exec.CommandContext for consistency - Implemented conditional context handling in NewTranscodingCache function - When enabled: uses request context directly (allows cancellation) - When disabled: uses background context with request metadata preserved - Added comprehensive tests for both FFmpeg and transcoding layers - Maintained backward compatibility with existing behavior as default The implementation follows proper layered architecture with policy decisions at the media streaming layer and execution utilities remaining focused on their core responsibilities. Signed-off-by: Deluan <deluan@navidrome.org>