whisper : more prominent log message for sub-1s audio (#2065)

whisper.cpp

@@ -5272,7 +5272,7 @@ int whisper_full_with_state(
     // basically don't process anything that is less than 1.0s
     // see issue #39: https://github.com/ggerganov/whisper.cpp/issues/39
     if (seek_end < seek_start + (params.speed_up ? 50 : 100)) {
-        WHISPER_LOG_DEBUG("%s: input is too short - %d ms < 1000 ms\n", __func__, (seek_end - seek_start)*10);
+        WHISPER_LOG_WARN("%s: input is too short - %d ms < 1000 ms. consider padding the input audio with silence\n", __func__, (seek_end - seek_start)*10);
         return 0;
     }