fix: reduce font size to 16, improve TTS sync (3 words/chunk, 0.3s/word)

server/routes/reels.ts

@@ -185,7 +185,7 @@ reelsRouter.post('/reels/preview', async (req: Request, res: Response) => {
             ttsEnabled,
             ttsVoice,
             wordDuration = 0.6,
-            fontSize = 24,
+            fontSize = 16,
             musicVolume = 0.25,
             drawText = true,
         } = req.body;
@@ -255,7 +255,7 @@ reelsRouter.post('/reels', async (req: Request, res: Response) => {
             pageIds,
             scheduledFor,
             wordDuration = 0.6,
-            fontSize = 24,
+            fontSize = 16,
             musicVolume = 0.25,
             drawText = true,
         } = req.body;

server/services/ffmpeg.ts

@@ -83,7 +83,7 @@ export class FFmpegService {
             tts_enabled: options.ttsEnabled,
             tts_voice: options.ttsVoice,
             word_duration: options.wordDuration ?? 0.6,
-            font_size: options.fontSize ?? 24,
+            font_size: options.fontSize ?? 16,
             music_volume: options.musicVolume ?? 0.25,
             draw_text: options.drawText ?? true,
         };
@@ -176,7 +176,7 @@ export class FFmpegService {
             tts_enabled: options.ttsEnabled,
             tts_voice: options.ttsVoice,
             word_duration: options.wordDuration ?? 0.6,
-            font_size: options.fontSize ?? 24,
+            font_size: options.fontSize ?? 16,
             music_volume: options.musicVolume ?? 0.25,
             draw_text: options.drawText ?? true,
         };