From 8b483a91bc155f30260c3886a5f19e235b64afde Mon Sep 17 00:00:00 2001 From: Elms Date: Thu, 5 Sep 2019 13:51:37 -0700 Subject: [PATCH] dshow: Add ability to save direct show graph --- modules/videoio/src/cap_dshow.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/modules/videoio/src/cap_dshow.cpp b/modules/videoio/src/cap_dshow.cpp index 2f360d68d9..2da182c19b 100644 --- a/modules/videoio/src/cap_dshow.cpp +++ b/modules/videoio/src/cap_dshow.cpp @@ -2936,6 +2936,22 @@ int videoInput::start(int deviceID, videoDevice *VD){ DebugPrintOut("SETUP: Device is setup and ready to capture.\n\n"); VD->readyToCapture = true; + // check for optional saving the direct show graph to a file + const char* graph_filename = getenv("OPENCV_DSHOW_SAVEGRAPH_FILENAME"); + if (graph_filename) { + size_t filename_len = strlen(graph_filename); + std::vector wfilename(filename_len + 1); + size_t len = mbstowcs(&wfilename[0], graph_filename, filename_len + 1); + CV_Assert(len == filename_len); + + HRESULT res = SaveGraphFile(VD->pGraph, &wfilename[0]); + if (SUCCEEDED(res)) { + DebugPrintOut("Saved DSHOW graph to %s\n", graph_filename); + } else { + DebugPrintOut("Failed to save DSHOW graph to %s\n", graph_filename); + } + } + //Release filters - seen someone else do this //looks like it solved the freezes