Add media normalization

.env.example

@@ -13,6 +13,20 @@ OPENWEBUI_AUTO_FIX_METADATA=1
 # Optional: JSON string to enforce as metadata template when auto-fix runs
 # OPENWEBUI_METADATA_TEMPLATE_JSON={}
 
+# Media normalisation
+MEDIA_NORMALIZE=1
+MEDIA_NORMALIZE_KEEP_ORIGINAL=0
+VIDEO_NORMALIZE_CODEC=hevc
+VIDEO_NORMALIZE_EXTENSION=.mp4
+VIDEO_NORMALIZE_CRF=28
+VIDEO_NORMALIZE_PRESET=medium
+VIDEO_NORMALIZE_AUDIO_CODEC=aac
+VIDEO_NORMALIZE_AUDIO_BITRATE=160k
+AUDIO_NORMALIZE_CODEC=libmp3lame
+AUDIO_NORMALIZE_EXTENSION=.mp3
+AUDIO_NORMALIZE_BITRATE=192k
+AUDIO_NORMALIZE_CHANNELS=2
+
 # Transcription backend (local Whisper by default)
 TRANSCRIBE_BACKEND=local
 OPENAI_API_KEY=