diff --git a/scripts/daemon/lesavka-core.sh b/scripts/daemon/lesavka-core.sh
index e3986e9..f57ae82 100644
--- a/scripts/daemon/lesavka-core.sh
+++ b/scripts/daemon/lesavka-core.sh
@@ -116,19 +116,20 @@ echo 32      >"$U/req_number" 2>/dev/null || true
 mkdir -p "$G/functions/uvc.usb0"
 F="$G/functions/uvc.usb0"
 
-# ── 1.  FORMAT DESCRIPTOR ──────────────────────────────────────────
-#     Uncompressed YUY2, 16 bpp
+# ── 1.  FORMAT DESCRIPTOR (uncompressed YUY2, 16 bpp) ──────────────
 mkdir -p "$F/streaming/uncompressed/u"
-echo YUY2  >"$F/streaming/uncompressed/u/guidFormat"
-echo 16    >"$F/streaming/uncompressed/u/bBitsPerPixel"
+# GUID = {59555932-0000-0010-8000-00aa00389b71} (“YUY2”) little‑endian
+printf '\x59\x55\x59\x32\x00\x00\x10\x00\x80\x00\x00\xaa\x00\x38\x9b\x71' \
+      >"$F/streaming/uncompressed/u/guidFormat"
+echo 16  >"$F/streaming/uncompressed/u/bBitsPerPixel"
 
-# ── 2.  FRAME DESCRIPTOR (index 1) ─────────────────────────────────
+# ── 2.  FRAME DESCRIPTOR (index 1 @ 30 fps) ────────────────────────
 mkdir -p "$F/streaming/uncompressed/u/f1"
-echo 1280      >"$F/streaming/uncompressed/u/f1/wWidth"
-echo 720       >"$F/streaming/uncompressed/u/f1/wHeight"
-echo 2764800   >"$F/streaming/uncompressed/u/f1/dwMaxVideoFrameBufferSize"
-echo 333333    >"$F/streaming/uncompressed/u/f1/dwDefaultFrameInterval"   # 30 fps
-echo 333333    >"$F/streaming/uncompressed/u/f1/dwFrameInterval"
+echo 1280    >"$F/streaming/uncompressed/u/f1/wWidth"
+echo 720     >"$F/streaming/uncompressed/u/f1/wHeight"
+echo 1843200 >"$F/streaming/uncompressed/u/f1/dwMaxVideoFrameBufferSize"
+echo 333333  >"$F/streaming/uncompressed/u/f1/dwDefaultFrameInterval"  # 30 fps
+echo 333333  >"$F/streaming/uncompressed/u/f1/dwFrameInterval"
 
 # ── 3.  REQUIRED HEADER LINKS ──────────────────────────────────────
 mkdir -p "$F/streaming/header"