diff --git a/backend/app/services/camera.py b/backend/app/services/camera.py
index 7972b9e..9efa2eb 100644
--- a/backend/app/services/camera.py
+++ b/backend/app/services/camera.py
@@ -136,9 +136,8 @@ async def isapi_snapshot(
     if frame_url:
         url = frame_url
     else:
-        # Hikvision ISAPI channel format: channel 1 main = 101
-        ch = f"{channel:02d}1"
-        url = f"http://{device.ip}:{port}/ISAPI/Streaming/channels/{ch}/picture"
+        # Hikvision: channel 1 main stream = 101, channel 2 = 201, etc.
+        url = f"http://{device.ip}:{port}/ISAPI/Streaming/channels/{channel}01/picture?snapShotImageType=JPEG"
 
     log.info("[camera] snapshot GET %s (user=%r)", url, user)
     try:
@@ -182,9 +181,7 @@ async def mjpeg_stream(
     if stream_url.startswith("http"):
         url = stream_url
     else:
-        # Hikvision ISAPI MJPEG: channel 1 main = 101
-        ch = f"{channel:02d}1"
-        url = f"http://{device.ip}:{port}/ISAPI/Streaming/channels/{ch}/httppreview"
+        url = f"http://{device.ip}:{port}/ISAPI/Streaming/channels/{channel}01/httppreview"
 
     async with httpx.AsyncClient(auth=(user, password), timeout=httpx.Timeout(timeout)) as client:
         async with client.stream("GET", url) as resp: