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Merge pull request #18535 from joshdoe:gray16_gstreamer_writing

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Add CV_16UC1/GRAY16_LE support to GStreamer backend for VideoWriter

* videoio(backend): add Writer_open_with_params to plugin API

This will allow arbitrary parameters to be passed to plugin backends

* videoio(gstreamer): add GRAY16_LE/CV_16UC1 writing support to GStreamer

This introduces a new property VIDEOWRITER_PROP_DEPTH, which defaults to
CV_8U, but for GStreamer can be set to CV_16U.

Also, fix another test to not fail if plugin isn't found, copying logic
from the read_write test.

* videoio(plugin): fix handling plugins with previous API level

* videoio: coding style

* fix warning
This commit is contained in:
joshdoe
2020-12-05 16:28:07 -05:00
committed by GitHub
parent 753ccd6b17
commit 541a09b7ac
10 changed files with 235 additions and 36 deletions
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modules/videoio/include/opencv2/videoio.hpp
+2 -1
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@@ -194,8 +194,9 @@ enum VideoWriterProperties {
VIDEOWRITER_PROP_QUALITY = 1, //!< Current quality (0..100%) of the encoded videostream. Can be adjusted dynamically in some codecs.
VIDEOWRITER_PROP_FRAMEBYTES = 2, //!< (Read-only): Size of just encoded video frame. Note that the encoding order may be different from representation order.
VIDEOWRITER_PROP_NSTRIPES = 3, //!< Number of stripes for parallel encoding. -1 for auto detection.
VIDEOWRITER_PROP_IS_COLOR = 4 //!< If it is not zero, the encoder will expect and encode color frames, otherwise it
VIDEOWRITER_PROP_IS_COLOR = 4, //!< If it is not zero, the encoder will expect and encode color frames, otherwise it
//!< will work with grayscale frames.
VIDEOWRITER_PROP_DEPTH = 5 //!< Defaults to CV_8U.
};
//! @} videoio_flags_base