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Merge pull request #15467 from elmsfu:dshow/add_save_graph_file

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Alexander Alekhin 2019-10-02 14:27:56 +00:00
commit 59c182ed2b
1 changed files with 16 additions and 0 deletions
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16
modules/videoio/src/cap_dshow.cpp
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@ -2936,6 +2936,22 @@ int videoInput::start(int deviceID, videoDevice *VD){
DebugPrintOut("SETUP: Device is setup and ready to capture.\n\n"); DebugPrintOut("SETUP: Device is setup and ready to capture.\n\n");
VD->readyToCapture = true; 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<WCHAR> 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 //Release filters - seen someone else do this
//looks like it solved the freezes //looks like it solved the freezes