expose apiPreference in VideoWriter #718
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I am going to make some updates to this PR. I will look at gstreamer pipeline elements that are provided in the default install of gstreamer and remove the need for the h264 encoder. The test I added does require gstreamer. Is this an issue in the AppVeyor configuration? |
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I think that opencv is not built with gstreamer inside appveyor. It uses |
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one question , can this pr still be merged? Is there other way to achive this visbility to create VideoWriters to gstreamer? |
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This pull request adds VideoWriter_OpenCap that accepts apiPrefrence.
To create a VideoWriter with apiPreference, the function VideoWriterCap has been exposed to accept the apiPreference. A test has been added to videoio_test to test gstreamer caps.