From 79b00841789705d2e95436bb1d4680e0e87ed035 Mon Sep 17 00:00:00 2001
From: Jules <contact@copydev.fr>
Date: Tue, 7 Apr 2026 19:27:54 +0200
Subject: [PATCH] Fix capture DSLR: pause avant capture + retry si I/O in
 progress

- Frontend: arrete le preview 300ms avant la capture
- Backend: 3 tentatives avec 500ms entre chaque si DSLR occupe

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 backend/camera.py     | 29 +++++++++++++++++------------
 frontend/js/camera.js |  4 +++-
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/backend/camera.py b/backend/camera.py
index 5c9b83f..d6faaee 100644
--- a/backend/camera.py
+++ b/backend/camera.py
@@ -146,18 +146,23 @@ class Camera:
             return self._capture_simulation(chemin_dest)
 
     def _capture_gphoto2(self, chemin_dest: Path) -> Path | None:
-        try:
-            chemin_camera = self.camera.capture(gp.GP_CAPTURE_IMAGE)
-            fichier_camera = gp.CameraFile()
-            self.camera.file_get(
-                chemin_camera.folder, chemin_camera.name, gp.GP_FILE_TYPE_NORMAL, fichier_camera
-            )
-            fichier_camera.save(str(chemin_dest))
-            log.info(f"Photo capturee (DSLR) : {chemin_dest}")
-            return chemin_dest
-        except gp.GPhoto2Error as e:
-            log.error(f"Erreur capture DSLR : {e}")
-            return None
+        for attempt in range(3):
+            try:
+                chemin_camera = self.camera.capture(gp.GP_CAPTURE_IMAGE)
+                fichier_camera = gp.CameraFile()
+                self.camera.file_get(
+                    chemin_camera.folder, chemin_camera.name, gp.GP_FILE_TYPE_NORMAL, fichier_camera
+                )
+                fichier_camera.save(str(chemin_dest))
+                log.info(f"Photo capturee (DSLR) : {chemin_dest}")
+                return chemin_dest
+            except gp.GPhoto2Error as e:
+                if "I/O in progress" in str(e) and attempt < 2:
+                    log.warning(f"DSLR occupe, retry {attempt + 1}/3...")
+                    time.sleep(0.5)
+                    continue
+                log.error(f"Erreur capture DSLR : {e}")
+                return None
 
     def _capture_webcam(self, chemin_dest: Path) -> Path | None:
         if not self.webcam or not self.webcam.isOpened():
diff --git a/frontend/js/camera.js b/frontend/js/camera.js
index 0ad6859..e8c4199 100644
--- a/frontend/js/camera.js
+++ b/frontend/js/camera.js
@@ -46,9 +46,11 @@ async function lancerCapture() {
     }
 
     await compteARebours();
-    afficherFlash();
 
     arreterPreview();
+    await pause(300);  // Laisser le DSLR se liberer du preview
+
+    afficherFlash();
     const resultat = await apiPost('/api/capturer');
 
     if (resultat.erreur) {