replay

server/src/services/replayEngineV2/constants.js

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+// Replay Engine Constants
+// Purpose: Defines runtime constants and filesystem paths used by replay worker and build pipelines.
+// Scope: Reads env-driven tuning values once and exposes immutable configuration values.
+const path = require('path');
+const { resolveDataDir } = require('../../helpers/dataPaths');
+
+const FFMPEG_BIN = process.env.FFMPEG_BIN || 'ffmpeg';
+const SEGMENT_ROOT = path.join(resolveDataDir(), 'replay-segments');
+const SEGMENT_SECONDS = Math.max(1, Number.parseInt(process.env.REPLAY_SEGMENT_SECONDS || '1', 10));
+const BUFFER_SECONDS = Math.max(20, Number.parseInt(process.env.REPLAY_BUFFER_SECONDS || '45', 10));
+const CLEANUP_INTERVAL_MS = 10_000;
+const BUILD_DURATION_MS = Math.max(5000, Number.parseInt(process.env.REPLAY_DURATION_MS || '20000', 10));
+const BUILD_GUARD_MS = Math.max(200, Number.parseInt(process.env.REPLAY_GUARD_MS || '1200', 10));
+const TARGET_FPS = Math.max(10, Number.parseInt(process.env.REPLAY_TARGET_FPS || '30', 10));
+const MAX_WIDTH = Math.max(320, Number.parseInt(process.env.REPLAY_MAX_WIDTH || '1280', 10));
+const MAX_HEIGHT = Math.max(180, Number.parseInt(process.env.REPLAY_MAX_HEIGHT || '720', 10));
+const MAX_BYTES = Math.floor(Number.parseFloat(process.env.REPLAY_MAX_OUTPUT_MB || '9.5') * 1024 * 1024);
+const SIDEBAR_WIDTH = 190;
+
+module.exports = {
+  FFMPEG_BIN,
+  SEGMENT_ROOT,
+  SEGMENT_SECONDS,
+  BUFFER_SECONDS,
+  CLEANUP_INTERVAL_MS,
+  BUILD_DURATION_MS,
+  BUILD_GUARD_MS,
+  TARGET_FPS,
+  MAX_WIDTH,
+  MAX_HEIGHT,
+  MAX_BYTES,
+  SIDEBAR_WIDTH,
+};