Better whisper-ctranslate vad filter option

packages/transcription/src/whisper/transcriber/ctranslate2-transcriber.ts

@@ -37,6 +37,10 @@ export class Ctranslate2Transcriber extends OpenaiTranscriber {
       'True',
       '--vad_filter',
       'true',
+      // Better precision with 5s of audio
+      // We mainly use vad_filter to improve language detection (first 30 seconds of the video, so no voice is problematic)
+      '--vad_min_silence_duration_ms',
+      '5000',
       '--output_format',
       'all',
       '--output_dir',