Merge 5db23597e9 into 9086072b8e

This commit provides a more robust fix for the RuntimeWarning
(invalid value encountered in divide/cast) that could occur in
the `apply_mouth_area` function within
`modules/processors/frame/face_swapper.py`.

The previous check for `feathered_mask.max() == 0` was not
sufficient for all floating point edge cases.

The updated logic now:
- Checks if `feathered_mask.max()` is less than a small epsilon (1e-6).
- If true, it logs a warning and explicitly sets `feathered_mask`
  to an all-zero `uint8` array of the correct shape.
- Otherwise, it proceeds with the normalization and casting to `uint8`.

This ensures that division by zero or by extremely small numbers is
prevented, and the `feathered_mask` is always in a valid state for
subsequent blending operations.

README.md

@@ -30,13 +30,13 @@ By using this software, you agree to these terms and commit to using it in a man
 
 Users are expected to use this software responsibly and legally. If using a real person's face, obtain their consent and clearly label any output as a deepfake when sharing online. We are not responsible for end-user actions.
 
-## Exclusive v2.0 Quick Start - Pre-built (Windows)
+## Exclusive v2.1 Quick Start - Pre-built (Windows/Mac Silicon)
 
   <a href="https://deeplivecam.net/index.php/quickstart"> <img src="media/Download.png" width="285" height="77" />
 
-##### This is the fastest build you can get if you have a discrete NVIDIA or AMD GPU.
+##### This is the fastest build you can get if you have a discrete NVIDIA or AMD GPU or Mac Silicon, And you'll receive special priority support.
  
-###### These Pre-builts are perfect for non-technical users or those who don't have time to, or can't manually install all the requirements. Just a heads-up: this is an open-source project, so you can also install it manually. This will be 60 days ahead on the open source version.
+###### These Pre-builts are perfect for non-technical users or those who don't have time to, or can't manually install all the requirements. Just a heads-up: this is an open-source project, so you can also install it manually. 
 
 ## TLDR; Live Deepfake in just 3 Clicks
 ![easysteps](https://github.com/user-attachments/assets/af825228-852c-411b-b787-ffd9aac72fc6)
@@ -187,12 +187,16 @@ pip install -r requirements.txt
 
 **CUDA Execution Provider (Nvidia)**
 
-1. Install [CUDA Toolkit 11.8.0](https://developer.nvidia.com/cuda-11-8-0-download-archive)
+1. Install [CUDA Toolkit 12.8.0](https://developer.nvidia.com/cuda-12-8-0-download-archive)
-2. Install dependencies:
+2. Install [cuDNN v8.9.7 for CUDA 12.x](https://developer.nvidia.com/rdp/cudnn-archive) (required for onnxruntime-gpu):
+   - Download cuDNN v8.9.7 for CUDA 12.x
+   - Make sure the cuDNN bin directory is in your system PATH
+3. Install dependencies:
 
 ```bash
+pip install -U torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu128
 pip uninstall onnxruntime onnxruntime-gpu
-pip install onnxruntime-gpu==1.16.3
+pip install onnxruntime-gpu==1.21.0
 ```
 
 3. Usage:
@@ -300,19 +304,6 @@ python run.py --execution-provider openvino
 -   Use a screen capture tool like OBS to stream.
 -   To change the face, select a new source image.
 
-## Tips and Tricks
-
-Check out these helpful guides to get the most out of Deep-Live-Cam:
-
-- [Unlocking the Secrets to the Perfect Deepfake Image](https://deeplivecam.net/index.php/blog/tips-and-tricks/unlocking-the-secrets-to-the-perfect-deepfake-image) - Learn how to create the best deepfake with full head coverage
-- [Video Call with DeepLiveCam](https://deeplivecam.net/index.php/blog/tips-and-tricks/video-call-with-deeplivecam) - Make your meetings livelier by using DeepLiveCam with OBS and meeting software
-- [Have a Special Guest!](https://deeplivecam.net/index.php/blog/tips-and-tricks/have-a-special-guest) - Tutorial on how to use face mapping to add special guests to your stream
-- [Watch Deepfake Movies in Realtime](https://deeplivecam.net/index.php/blog/tips-and-tricks/watch-deepfake-movies-in-realtime) - See yourself star in any video without processing the video
-- [Better Quality without Sacrificing Speed](https://deeplivecam.net/index.php/blog/tips-and-tricks/better-quality-without-sacrificing-speed) - Tips for achieving better results without impacting performance
-- [Instant Vtuber!](https://deeplivecam.net/index.php/blog/tips-and-tricks/instant-vtuber) - Create a new persona/vtuber easily using Metahuman Creator
-
-Visit our [official blog](https://deeplivecam.net/index.php/blog/tips-and-tricks) for more tips and tutorials.
-
 ## Command Line Arguments (Unmaintained)
 
 ```
@@ -356,6 +347,8 @@ Looking for a CLI mode? Using the -s/--source argument will make the run program
  - [*"This real-time webcam deepfake tool raises alarms about the future of identity theft"*](https://www.diyphotography.net/this-real-time-webcam-deepfake-tool-raises-alarms-about-the-future-of-identity-theft/) - DIYPhotography
  - [*"That's Crazy, Oh God. That's Fucking Freaky Dude... That's So Wild Dude"*](https://www.youtube.com/watch?time_continue=1074&v=py4Tc-Y8BcY) - SomeOrdinaryGamers
  - [*"Alright look look look, now look chat, we can do any face we want to look like chat"*](https://www.youtube.com/live/mFsCe7AIxq8?feature=shared&t=2686) - IShowSpeed
+ - [*"They do a pretty good job matching poses, expression and even the lighting"*](https://www.youtube.com/watch?v=wnCghLjqv3s&t=551s) - TechLinked (LTT)
+
 
 ## Credits
 

locales/es.json

@@ -0,0 +1,46 @@
+{
+    "Source x Target Mapper": "Mapeador de fuente x destino",
+    "select a source image": "Seleccionar imagen fuente",
+    "Preview": "Vista previa",
+    "select a target image or video": "elegir un video o una imagen fuente",
+    "save image output file": "guardar imagen final",
+    "save video output file": "guardar video final",
+    "select a target image": "elegir una imagen objetiva",
+    "source": "fuente",
+    "Select a target": "Elegir un destino",
+    "Select a face": "Elegir una cara",
+    "Keep audio": "Mantener audio original",
+    "Face Enhancer": "Potenciador de caras",
+    "Many faces": "Varias caras",
+    "Show FPS": "Mostrar fps",
+    "Keep fps": "Mantener fps",
+    "Keep frames": "Mantener frames",
+    "Fix Blueish Cam": "Corregir tono azul de video",
+    "Mouth Mask": "Máscara de boca",
+    "Show Mouth Mask Box": "Mostrar área de la máscara de boca",
+    "Start": "Iniciar",
+    "Live": "En vivo",
+    "Destroy": "Borrar",
+    "Map faces": "Mapear caras",
+    "Processing...": "Procesando...",
+    "Processing succeed!": "¡Proceso terminado con éxito!",
+    "Processing ignored!": "¡Procesamiento omitido!",
+    "Failed to start camera": "No se pudo iniciar la cámara",
+    "Please complete pop-up or close it.": "Complete o cierre el pop-up",
+    "Getting unique faces": "Buscando caras únicas",
+    "Please select a source image first": "Primero, seleccione una imagen fuente",
+    "No faces found in target": "No se encontró una cara en el destino",
+    "Add": "Agregar",
+    "Clear": "Limpiar",
+    "Submit": "Enviar",
+    "Select source image": "Seleccionar imagen fuente",
+    "Select target image": "Seleccionar imagen destino",
+    "Please provide mapping!": "Por favor, proporcione un mapeo",
+    "At least 1 source with target is required!": "Se requiere al menos una fuente con un destino.",
+    "At least 1 source with target is required!": "Se requiere al menos una fuente con un destino.",
+    "Face could not be detected in last upload!": "¡No se pudo encontrar una cara en el último video o imagen!",
+    "Select Camera:": "Elegir cámara:",
+    "All mappings cleared!": "¡Todos los mapeos fueron borrados!",
+    "Mappings successfully submitted!": "Mapeos enviados con éxito!",
+    "Source x Target Mapper is already open.": "El mapeador de fuente x destino ya está abierto."
+}

locales/km.json

@@ -0,0 +1,45 @@
+{
+    "Source x Target Mapper": "ប្រភប x បន្ថែម Mapper",
+    "select a source image": "ជ្រើសរើសប្រភពរូបភាព",
+    "Preview": "បង្ហាញ",
+    "select a target image or video": "ជ្រើសរើសគោលដៅរូបភាពឬវីដេអូ",
+    "save image output file": "រក្សាទុកលទ្ធផលឯកសាររូបភាព",
+    "save video output file": "រក្សាទុកលទ្ធផលឯកសារវីដេអូ",
+    "select a target image": "ជ្រើសរើសគោលដៅរូបភាព",
+    "source": "ប្រភព",
+    "Select a target": "ជ្រើសរើសគោលដៅ",
+    "Select a face": "ជ្រើសរើសមុខ",
+    "Keep audio": "រម្លងសម្លេង",
+    "Face Enhancer": "ឧបករណ៍ពង្រឹងមុខ",
+    "Many faces": "ទម្រង់មុខច្រើន",
+    "Show FPS": "បង្ហាញ FPS",
+    "Keep fps": "រម្លង fps",
+    "Keep frames": "រម្លងទម្រង់",
+    "Fix Blueish Cam": "ជួសជុល Cam Blueish",
+    "Mouth Mask": "របាំងមាត់",
+    "Show Mouth Mask Box": "បង្ហាញប្រអប់របាំងមាត់",
+    "Start": "ចាប់ផ្ដើម",
+    "Live": "ផ្សាយផ្ទាល់",
+    "Destroy": "លុប",
+    "Map faces": "ផែនទីមុខ",
+    "Processing...": "កំពុងដំណើរការ...",
+    "Processing succeed!": "ការដំណើរការទទួលបានជោគជ័យ!",
+    "Processing ignored!": "ការដំណើរការមិនទទួលបានជោគជ័យ!",
+    "Failed to start camera": "បរាជ័យដើម្បីចាប់ផ្ដើមបើកកាមេរ៉ា",
+    "Please complete pop-up or close it.": "សូមបញ្ចប់ផ្ទាំងផុស ឬបិទវា.",
+    "Getting unique faces": "ការចាប់ផ្ដើមទម្រង់មុខប្លែក",
+    "Please select a source image first": "សូមជ្រើសរើសប្រភពរូបភាពដំបូង",
+    "No faces found in target": "រកអត់ឃើញមុខនៅក្នុងគោលដៅ",
+    "Add": "បន្ថែម",
+    "Clear": "សម្អាត",
+    "Submit": "បញ្ចូន",
+    "Select source image": "ជ្រើសរើសប្រភពរូបភាព",
+    "Select target image": "ជ្រើសរើសគោលដៅរូបភាព",
+    "Please provide mapping!": "សូមផ្ដល់នៅផែនទី",
+    "At least 1 source with target is required!": "ត្រូវការប្រភពយ៉ាងហោចណាស់ ១ ដែលមានគោលដៅ!",
+    "Face could not be detected in last upload!": "មុខមិនអាចភ្ជាប់នៅក្នុងការបង្ហេាះចុងក្រោយ!",
+    "Select Camera:": "ជ្រើសរើសកាមេរ៉ា",
+    "All mappings cleared!": "ផែនទីទាំងអស់ត្រូវបានសម្អាត!",
+    "Mappings successfully submitted!": "ផែនទីត្រូវបានបញ្ជូនជោគជ័យ!",
+    "Source x Target Mapper is already open.": "ប្រភព x Target Mapper បានបើករួចហើយ។"
+}

locales/ko.json

@@ -0,0 +1,45 @@
+{
+    "Source x Target Mapper": "소스 x 타겟 매퍼",
+    "select a source image": "소스 이미지 선택",
+    "Preview": "미리보기",
+    "select a target image or video": "타겟 이미지 또는 영상 선택",
+    "save image output file": "이미지 출력 파일 저장",
+    "save video output file": "영상 출력 파일 저장",
+    "select a target image": "타겟 이미지 선택",
+    "source": "소스",
+    "Select a target": "타겟 선택",
+    "Select a face": "얼굴 선택",
+    "Keep audio": "오디오 유지",
+    "Face Enhancer": "얼굴 향상",
+    "Many faces": "여러 얼굴",
+    "Show FPS": "FPS 표시",
+    "Keep fps": "FPS 유지",
+    "Keep frames": "프레임 유지",
+    "Fix Blueish Cam": "푸른빛 카메라 보정",
+    "Mouth Mask": "입 마스크",
+    "Show Mouth Mask Box": "입 마스크 박스 표시",
+    "Start": "시작",
+    "Live": "라이브",
+    "Destroy": "종료",
+    "Map faces": "얼굴 매핑",
+    "Processing...": "처리 중...",
+    "Processing succeed!": "처리 성공!",
+    "Processing ignored!": "처리 무시됨!",
+    "Failed to start camera": "카메라 시작 실패",
+    "Please complete pop-up or close it.": "팝업을 완료하거나 닫아주세요.",
+    "Getting unique faces": "고유 얼굴 가져오는 중",
+    "Please select a source image first": "먼저 소스 이미지를 선택해주세요",
+    "No faces found in target": "타겟에서 얼굴을 찾을 수 없음",
+    "Add": "추가",
+    "Clear": "지우기",
+    "Submit": "제출",
+    "Select source image": "소스 이미지 선택",
+    "Select target image": "타겟 이미지 선택",
+    "Please provide mapping!": "매핑을 입력해주세요!",
+    "At least 1 source with target is required!": "최소 하나의 소스와 타겟이 필요합니다!",
+    "Face could not be detected in last upload!": "최근 업로드에서 얼굴을 감지할 수 없습니다!",
+    "Select Camera:": "카메라 선택:",
+    "All mappings cleared!": "모든 매핑이 삭제되었습니다!",
+    "Mappings successfully submitted!": "매핑이 성공적으로 제출되었습니다!",
+    "Source x Target Mapper is already open.": "소스 x 타겟 매퍼가 이미 열려 있습니다."
+}

locales/pt-br.json

@@ -0,0 +1,46 @@
+{
+    "Source x Target Mapper": "Mapeador de Origem x Destino",
+    "select an source image": "Escolha uma imagem de origem",
+    "Preview": "Prévia",
+    "select an target image or video": "Escolha uma imagem ou vídeo de destino",
+    "save image output file": "Salvar imagem final",
+    "save video output file": "Salvar vídeo final",
+    "select an target image": "Escolha uma imagem de destino",
+    "source": "Origem",
+    "Select a target": "Escolha o destino",
+    "Select a face": "Escolha um rosto",
+    "Keep audio": "Manter o áudio original",
+    "Face Enhancer": "Melhorar rosto",
+    "Many faces": "Vários rostos",
+    "Show FPS": "Mostrar FPS",
+    "Keep fps": "Manter FPS",
+    "Keep frames": "Manter frames",
+    "Fix Blueish Cam": "Corrigir tom azulado da câmera",
+    "Mouth Mask": "Máscara da boca",
+    "Show Mouth Mask Box": "Mostrar área da máscara da boca",
+    "Start": "Começar",
+    "Live": "Ao vivo",
+    "Destroy": "Destruir",
+    "Map faces": "Mapear rostos",
+    "Processing...": "Processando...",
+    "Processing succeed!": "Tudo certo!",
+    "Processing ignored!": "Processamento ignorado!",
+    "Failed to start camera": "Não foi possível iniciar a câmera",
+    "Please complete pop-up or close it.": "Finalize ou feche o pop-up",
+    "Getting unique faces": "Buscando rostos diferentes",
+    "Please select a source image first": "Selecione primeiro uma imagem de origem",
+    "No faces found in target": "Nenhum rosto encontrado na imagem de destino",
+    "Add": "Adicionar",
+    "Clear": "Limpar",
+    "Submit": "Enviar",
+    "Select source image": "Escolha a imagem de origem",
+    "Select target image": "Escolha a imagem de destino",
+    "Please provide mapping!": "Você precisa realizar o mapeamento!",
+    "Atleast 1 source with target is required!": "É necessária pelo menos uma origem com um destino!",
+    "At least 1 source with target is required!": "É necessária pelo menos uma origem com um destino!",
+    "Face could not be detected in last upload!": "Não conseguimos detectar o rosto na última imagem!",
+    "Select Camera:": "Escolher câmera:",
+    "All mappings cleared!": "Todos os mapeamentos foram removidos!",
+    "Mappings successfully submitted!": "Mapeamentos enviados com sucesso!",
+    "Source x Target Mapper is already open.": "O Mapeador de Origem x Destino já está aberto."
+}

locales/ru.json

@@ -0,0 +1,45 @@
+{
+    "Source x Target Mapper": "Сопоставитель Источник x Цель",
+    "select a source image": "выберите исходное изображение",
+    "Preview": "Предпросмотр",
+    "select a target image or video": "выберите целевое изображение или видео",
+    "save image output file": "сохранить выходной файл изображения",
+    "save video output file": "сохранить выходной файл видео",
+    "select a target image": "выберите целевое изображение",
+    "source": "источник",
+    "Select a target": "Выберите целевое изображение",
+    "Select a face": "Выберите лицо",
+    "Keep audio": "Сохранить аудио",
+    "Face Enhancer": "Улучшение лица",
+    "Many faces": "Несколько лиц",
+    "Show FPS": "Показать FPS",
+    "Keep fps": "Сохранить FPS",
+    "Keep frames": "Сохранить кадры",
+    "Fix Blueish Cam": "Исправить синеву камеры",
+    "Mouth Mask": "Маска рта",
+    "Show Mouth Mask Box": "Показать рамку маски рта",
+    "Start": "Старт",
+    "Live": "В реальном времени",
+    "Destroy": "Остановить",
+    "Map faces": "Сопоставить лица",
+    "Processing...": "Обработка...",
+    "Processing succeed!": "Обработка успешна!",
+    "Processing ignored!": "Обработка проигнорирована!",
+    "Failed to start camera": "Не удалось запустить камеру",
+    "Please complete pop-up or close it.": "Пожалуйста, заполните всплывающее окно или закройте его.",
+    "Getting unique faces": "Получение уникальных лиц",
+    "Please select a source image first": "Сначала выберите исходное изображение, пожалуйста",
+    "No faces found in target": "В целевом изображении не найдено лиц",
+    "Add": "Добавить",
+    "Clear": "Очистить",
+    "Submit": "Отправить",
+    "Select source image": "Выбрать исходное изображение",
+    "Select target image": "Выбрать целевое изображение",
+    "Please provide mapping!": "Пожалуйста, укажите сопоставление!",
+    "At least 1 source with target is required!": "Требуется хотя бы 1 источник с целью!",
+    "Face could not be detected in last upload!": "Лицо не обнаружено в последнем загруженном изображении!",
+    "Select Camera:": "Выберите камеру:",
+    "All mappings cleared!": "Все сопоставления очищены!",
+    "Mappings successfully submitted!": "Сопоставления успешно отправлены!",
+    "Source x Target Mapper is already open.": "Сопоставитель Источник-Цель уже открыт."
+}

locales/th.json

@@ -0,0 +1,45 @@
+{
+    "Source x Target Mapper": "ตัวจับคู่ต้นทาง x ปลายทาง",
+    "select a source image": "เลือกรูปภาพต้นฉบับ",
+    "Preview": "ตัวอย่าง",
+    "select a target image or video": "เลือกรูปภาพหรือวิดีโอเป้าหมาย",
+    "save image output file": "บันทึกไฟล์รูปภาพ",
+    "save video output file": "บันทึกไฟล์วิดีโอ",
+    "select a target image": "เลือกรูปภาพเป้าหมาย",
+    "source": "ต้นฉบับ",
+    "Select a target": "เลือกเป้าหมาย",
+    "Select a face": "เลือกใบหน้า",
+    "Keep audio": "เก็บเสียง",
+    "Face Enhancer": "ปรับปรุงใบหน้า",
+    "Many faces": "หลายใบหน้า",
+    "Show FPS": "แสดง FPS",
+    "Keep fps": "คงค่า FPS",
+    "Keep frames": "คงค่าเฟรม",
+    "Fix Blueish Cam": "แก้ไขภาพอมฟ้าจากกล้อง",
+    "Mouth Mask": "มาสก์ปาก",
+    "Show Mouth Mask Box": "แสดงกรอบมาสก์ปาก",
+    "Start": "เริ่ม",
+    "Live": "สด",
+    "Destroy": "หยุด",
+    "Map faces": "จับคู่ใบหน้า",
+    "Processing...": "กำลังประมวลผล...",
+    "Processing succeed!": "ประมวลผลสำเร็จแล้ว!",
+    "Processing ignored!": "การประมวลผลถูกละเว้น",
+    "Failed to start camera": "ไม่สามารถเริ่มกล้องได้",
+    "Please complete pop-up or close it.": "โปรดดำเนินการในป๊อปอัปให้เสร็จสิ้น หรือปิด",
+    "Getting unique faces": "กำลังค้นหาใบหน้าที่ไม่ซ้ำกัน",
+    "Please select a source image first": "โปรดเลือกภาพต้นฉบับก่อน",
+    "No faces found in target": "ไม่พบใบหน้าในภาพเป้าหมาย",
+    "Add": "เพิ่ม",
+    "Clear": "ล้าง",
+    "Submit": "ส่ง",
+    "Select source image": "เลือกภาพต้นฉบับ",
+    "Select target image": "เลือกภาพเป้าหมาย",
+    "Please provide mapping!": "โปรดระบุการจับคู่!",
+    "At least 1 source with target is required!": "ต้องมีการจับคู่ต้นฉบับกับเป้าหมายอย่างน้อย 1 คู่!",
+    "Face could not be detected in last upload!": "ไม่สามารถตรวจพบใบหน้าในไฟล์อัปโหลดล่าสุด!",
+    "Select Camera:": "เลือกกล้อง:",
+    "All mappings cleared!": "ล้างการจับคู่ทั้งหมดแล้ว!",
+    "Mappings successfully submitted!": "ส่งการจับคู่สำเร็จแล้ว!",
+    "Source x Target Mapper is already open.": "ตัวจับคู่ต้นทาง x ปลายทาง เปิดอยู่แล้ว"
+}

modules/face_analyser.py

@@ -2,6 +2,7 @@ import os
 import shutil
 from typing import Any
 import insightface
+import logging # Added logging import
 
 import cv2
 import numpy as np
@@ -25,18 +26,27 @@ def get_face_analyser() -> Any:
 
 
 def get_one_face(frame: Frame) -> Any:
-    face = get_face_analyser().get(frame)
+    faces = get_face_analyser().get(frame)
+    if not faces:
+        logging.debug("Face_analyser: get_one_face: No faces found by insightface.")
+        return None
     try:
-        return min(face, key=lambda x: x.bbox[0])
+        return min(faces, key=lambda x: x.bbox[0])
     except ValueError:
+        logging.debug("Face_analyser: get_one_face: ValueError, likely no faces after all.")
         return None
 
 
 def get_many_faces(frame: Frame) -> Any:
-    try:
+    faces = get_face_analyser().get(frame)
-        return get_face_analyser().get(frame)
+    if not faces: # Check if faces is None or an empty list
-    except IndexError:
+        logging.debug("Face_analyser: get_many_faces: No faces found by insightface.")
-        return None
+        # Depending on what insightface returns for no faces,
+        # you might return None or an empty list.
+        # If .get() returns an empty list for no faces, this check is sufficient.
+        # If .get() returns None, this is also fine.
+        return faces # Return original (None or empty list)
+    return faces
 
 def has_valid_map() -> bool:
     for map in modules.globals.source_target_map:

modules/processors/frame/face_enhancer.py

@@ -82,7 +82,8 @@ def get_face_enhancer() -> Any:
                 selected_device = torch.device("cpu")
                 device_priority.append("CPU")
             
-            FACE_ENHANCER = gfpgan.GFPGANer(model_path=model_path, upscale=2, device=selected_device)
+            upscale_factor = getattr(modules.globals, 'gfpgan_upscale_factor', 2)
+            FACE_ENHANCER = gfpgan.GFPGANer(model_path=model_path, upscale=upscale_factor, device=selected_device)
 
             # for debug:
             print(f"Selected device: {selected_device} and device priority: {device_priority}")

modules/processors/frame/face_swapper.py

@@ -21,6 +21,16 @@ FACE_SWAPPER = None
 THREAD_LOCK = threading.Lock()
 NAME = "DLC.FACE-SWAPPER"
 
+
+def _validate_kernel_size(kernel_tuple, default_kernel_tuple):
+    if isinstance(kernel_tuple, tuple) and len(kernel_tuple) == 2 and \
+       isinstance(kernel_tuple[0], int) and kernel_tuple[0] > 0 and kernel_tuple[0] % 2 == 1 and \
+       isinstance(kernel_tuple[1], int) and kernel_tuple[1] > 0 and kernel_tuple[1] % 2 == 1:
+        return kernel_tuple
+    else:
+        logging.warning(f"Invalid kernel size {kernel_tuple} received. Must be a tuple of two positive odd integers. Falling back to default {default_kernel_tuple}.")
+        return default_kernel_tuple
+
 abs_dir = os.path.dirname(os.path.abspath(__file__))
 models_dir = os.path.join(
     os.path.dirname(os.path.dirname(os.path.dirname(abs_dir))), "models"
@@ -83,8 +93,12 @@ def swap_face(source_face: Face, target_face: Face, temp_frame: Frame) -> Frame:
         if original_target_face_roi.size > 0:
             swapped_face_roi = swapped_frame[y1:y2, x1:x2].copy()
             if swapped_face_roi.size > 0:
-                corrected_swapped_face_roi = apply_color_transfer(swapped_face_roi, original_target_face_roi)
+                try:
-                swapped_frame[y1:y2, x1:x2] = corrected_swapped_face_roi
+                    corrected_swapped_face_roi = apply_color_transfer(swapped_face_roi, original_target_face_roi)
+                    swapped_frame[y1:y2, x1:x2] = corrected_swapped_face_roi
+                except Exception as e:
+                    logging.error(f"Failed to apply statistical color transfer: {e}. Using original swapped ROI.")
+                    # swapped_frame already contains the uncorrected swapped_face_roi in this region
     else:
         # Apply the face swap without statistical color correction
         swapped_frame = face_swapper.get(
@@ -122,16 +136,26 @@ def process_frame(source_face: Face, temp_frame: Frame) -> Frame:
         many_faces = get_many_faces(temp_frame)
         if many_faces:
             for target_face in many_faces:
-                if source_face and target_face:
+                if source_face and target_face: # target_face from many_faces will always be valid here
                     temp_frame = swap_face(source_face, target_face, temp_frame)
-                else:
+                elif not source_face: # Check source_face specifically
-                    print("Face detection failed for target/source.")
+                    logging.error("Source face is not available or no face detected in source image. Skipping swap for this target face.")
+                    # Optionally `continue` or `break` if source_face is essential for all
+        elif not source_face : # if many_faces is empty AND source_face is also an issue
+             logging.error("Source face is not available AND no faces detected in target frame.")
+        else: # many_faces is empty, but source_face is ok
+             logging.info(f"No faces detected in the current target frame for 'many_faces' mode.")
     else:
         target_face = get_one_face(temp_frame)
         if target_face and source_face:
             temp_frame = swap_face(source_face, target_face, temp_frame)
         else:
-            logging.error("Face detection failed for target or source.")
+            if not source_face:
+                logging.error("Source face is not available or no face detected in source image.")
+            elif not target_face:
+                logging.error(f"No face detected in the current target frame.")
+            else: # Should not happen if logic is right, but as a fallback
+                logging.error("Face detection failed for an unknown reason concerning target or source.")
     return temp_frame
 
 
@@ -383,8 +407,12 @@ def create_lower_mouth_mask(
         cv2.fillPoly(mask_roi, [expanded_landmarks - [min_x, min_y]], 255)
 
         # Apply Gaussian blur to soften the mask edges
-        kernel_size_mouth = getattr(modules.globals, 'mouth_mask_blur_kernel_size', (9, 9))
+        # Default kernel size for mouth mask blur is (9,9) as a balance between performance and smoothing.
-        mask_roi = cv2.GaussianBlur(mask_roi, kernel_size_mouth, 0)
+        # Larger values (e.g., (15,15) - the previous hardcoded value) provide more smoothing but are slower.
+        # This is configurable via modules.globals.mouth_mask_blur_kernel_size.
+        kernel_size_mouth_config = getattr(modules.globals, 'mouth_mask_blur_kernel_size', (9, 9))
+        valid_kernel_mouth = _validate_kernel_size(kernel_size_mouth_config, (9, 9))
+        mask_roi = cv2.GaussianBlur(mask_roi, valid_kernel_mouth, 0)
 
         # Place the mask ROI in the full-sized mask
         mask[min_y:max_y, min_x:max_x] = mask_roi
@@ -525,7 +553,13 @@ def apply_mouth_area(
         feathered_mask = cv2.GaussianBlur(
             polygon_mask.astype(float), (0, 0), feather_amount
         )
-        feathered_mask = feathered_mask / feathered_mask.max()
+
+        mask_max_value = feathered_mask.max()
+        if mask_max_value < 1e-6:  # Check if max is effectively zero
+            logging.warning("Mouth mask's feathered_mask is all zeros or near-zeros after blur. Resulting mask will be black.")
+            feathered_mask = np.zeros_like(polygon_mask, dtype=np.uint8)
+        else:
+            feathered_mask = (feathered_mask / mask_max_value * 255).astype(np.uint8)
 
         face_mask_roi = face_mask[min_y:max_y, min_x:max_x]
         combined_mask = feathered_mask * (face_mask_roi / 255.0)
@@ -613,8 +647,9 @@ def create_face_mask(face: Face, frame: Frame) -> np.ndarray:
         cv2.fillConvexPoly(mask, hull_padded, 255)
 
         # Smooth the mask edges
-        kernel_size_face = getattr(modules.globals, 'face_mask_blur_kernel_size', (5, 5))
+        kernel_size_face_config = getattr(modules.globals, 'face_mask_blur_kernel_size', (5, 5))
-        mask = cv2.GaussianBlur(mask, kernel_size_face, 0)
+        valid_kernel_face = _validate_kernel_size(kernel_size_face_config, (5, 5))
+        mask = cv2.GaussianBlur(mask, valid_kernel_face, 0)
 
     return mask