From 4475fb24caff0dff7f3b7335110a871c805d54dd Mon Sep 17 00:00:00 2001
From: Vincent Rabaud <vrabaud@google.com>
Date: Fri, 23 Jan 2026 11:17:35 +0100
Subject: [PATCH] Remove unused C structs from VideoCapture/VideoWriter

---
 modules/videoio/include/opencv2/videoio.hpp | 10 ----------
 modules/videoio/src/cap.cpp                 |  3 ---
 2 files changed, 13 deletions(-)

diff --git a/modules/videoio/include/opencv2/videoio.hpp b/modules/videoio/include/opencv2/videoio.hpp
index 7688718c47..34e95421f8 100644
--- a/modules/videoio/include/opencv2/videoio.hpp
+++ b/modules/videoio/include/opencv2/videoio.hpp
@@ -66,9 +66,6 @@
 
 ////////////////////////////////// video io /////////////////////////////////
 
-typedef struct CvCapture CvCapture;
-typedef struct CvVideoWriter CvVideoWriter;
-
 namespace cv
 {
 
@@ -1060,7 +1057,6 @@ public:
             int64 timeoutNs = 0);
 
 protected:
-    Ptr<CvCapture> cap;
     Ptr<IVideoCapture> icap;
     bool throwOnFail;
 
@@ -1239,18 +1235,12 @@ public:
     CV_WRAP String getBackendName() const;
 
 protected:
-    Ptr<CvVideoWriter> writer;
     Ptr<IVideoWriter> iwriter;
 
     static Ptr<IVideoWriter> create(const String& filename, int fourcc, double fps,
                                     Size frameSize, bool isColor = true);
 };
 
-//! @cond IGNORED
-template<> struct DefaultDeleter<CvCapture>{ CV_EXPORTS void operator ()(CvCapture* obj) const; };
-template<> struct DefaultDeleter<CvVideoWriter>{ CV_EXPORTS void operator ()(CvVideoWriter* obj) const; };
-//! @endcond IGNORED
-
 //! @} videoio
 
 } // cv
diff --git a/modules/videoio/src/cap.cpp b/modules/videoio/src/cap.cpp
index 45dba466ea..9118ac8cdb 100644
--- a/modules/videoio/src/cap.cpp
+++ b/modules/videoio/src/cap.cpp
@@ -62,9 +62,6 @@ static bool param_VIDEOWRITER_DEBUG = utils::getConfigurationParameterBool("OPEN
         CV_LOG_WARNING(nullptr, __VA_ARGS__)            \
     }
 
-void DefaultDeleter<CvCapture>::operator ()(CvCapture* obj) const { cvReleaseCapture(&obj); }
-void DefaultDeleter<CvVideoWriter>::operator ()(CvVideoWriter* obj) const { cvReleaseVideoWriter(&obj); }
-
 IStreamReader::~IStreamReader()
 {
     // nothing