# Qualcomm GST plugins Source: [https://docs.qualcomm.com/doc/80-70014-50/topic/qim-sdk-plugins.html](https://docs.qualcomm.com/doc/80-70014-50/topic/qim-sdk-plugins.html) The Qualcomm GST plugins are used to control various aspects of the multimedia software. These plugins and the sample applications are hosted in the [gst-plugins-qti-oss](https://git.codelinaro.org/clo/le/platform/vendor/qcom-opensource/gst-plugins-qti-oss/-/tree/imsdk.lnx.2.0.0.r1-rel?ref_type=heads) folder. The plugins are categorized as good, bad, and ugly: - Good –[https://gstreamer.freedesktop.org/modules/gst-plugins-good.html](https://gstreamer.freedesktop.org/modules/gst-plugins-good.html) - Bad – [https://gstreamer.freedesktop.org/modules/gst-plugins-bad.html](https://gstreamer.freedesktop.org/modules/gst-plugins-bad.html) - Ugly –[https://gstreamer.freedesktop.org/modules/gst-plugins-ugly.html](https://gstreamer.freedesktop.org/modules/gst-plugins-ugly.html) ## Qualcomm IM SDK artifacts | Plugin details | Size in MB | | --- | --- | | **Release variant** | **60** | | Upstream plugins | 14.62 | | Qualcomm GST plugins | 45.37 | | **Developer variant** | **4.55** | | Upstream plugins | 4.20 | | Qualcomm GST plugins | 0.35 | | **Debug variant** | **87.56** | | Upstream plugins | 85.01 | | Qualcomm GST plugins | 2.55 | - **[qtiqmmfsrc](https://docs.qualcomm.com/doc/80-70014-50/topic/qtiqmmfsrc.html)** The qtiqmmfsrc plugin captures the video frames through Qualcomm Camera Service. - **[v4l2h264dec](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h264dec.html)** The v4l2h264dec plugin uses the V4L2 APIs for decoding the video stream. - **[v4l2h265dec](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h265dec.html)** The v4l2h265dec plugin uses the V4L2 APIs for decoding the video stream. - **[v4l2h264enc](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h264enc.html)** The v4l2h264enc plugin uses V4L2 APIs for encoding of video stream. - **[v4l2h265enc](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h265enc.html)** The v4l2h265enc plugin uses V4L2 APIs for encoding of video stream. - **[v4l2vp9dec](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2vp9dec.html)** The v4l2vp9dec plugin uses V4L2 APIs for decoding the video stream. - **[pulsesrc](https://docs.qualcomm.com/doc/80-70014-50/topic/pulsesrc.html)** The pulsesrc plugin interacts with the underlying PulseAudio sound server to capture the pulse coded modulation (PCM) samples. - **[pulsesink](https://docs.qualcomm.com/doc/80-70014-50/topic/pulsesink.html)** The pulsesink plugin interacts with the underlying PulseAudio sound server to play the PCM samples. - **[qtivcomposer](https://docs.qualcomm.com/doc/80-70014-50/topic/qtivcomposer.html)** The qtivcomposer plugin uses the GPU hardware to merge/mix multiple input video streams into single output stream. - **[qtivsplit](https://docs.qualcomm.com/doc/80-70014-50/topic/qtivsplit.html)** The qtivsplit plugin uses the GPU hardware to split a single input video stream into multiple output streams whose number is a user-defined variable and is equal to the number of source pads. - **[qtimetamux](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimetamux.html)** The qtimetamux plugin uses frame matching techniques to associate or attach ML string based postprocessing results (output from postprocessing plugin) or CV information to original frame such as [GstMeta](https://gstreamer.freedesktop.org/documentation/gstreamer/gstmeta.html#GstMeta). - **[qtioverlay](https://docs.qualcomm.com/doc/80-70014-50/topic/qtioverlay.html)** The qtioverlay plugin is a hardware accelerated in-place image draw and blit plugin for drawing overlays on top of the YUV images. - **[qtisocketsink](https://docs.qualcomm.com/doc/80-70014-50/topic/qtisocketsink.html)** The qtisocketsink plugin uses UNIX sockets to transfer file descriptor (FD) backed [GstBuffers](https://gstreamer.freedesktop.org/documentation/gstreamer/gstbuffer.html) to other processes with qtisocketsrc as the entry point. - **[qtisocketsrc](https://docs.qualcomm.com/doc/80-70014-50/topic/qtisocketsrc.html)** The qtisocketsrc plugin uses UNIX sockets to receive FD backed [GstBuffers](https://gstreamer.freedesktop.org/documentation/gstreamer/gstbuffer.html) from other processes that have qtisocketsink as the exit point. - **[qtivtransform](https://docs.qualcomm.com/doc/80-70014-50/topic/qtivtransform.html)** The qtivtransform plugin uses GPU hardware to upscale/downscale, flip, rotate, crop, and color covert the incoming the YUV or RGB video frames determined by the element properties. - **[Waylandsink](https://docs.qualcomm.com/doc/80-70014-50/topic/waylandsink.html)** The waylandsink plugin uses [GstVideoSink](https://gstreamer.freedesktop.org/documentation/video/gstvideosink.html?gi-language=c) GStreamer class. It is based on Wayland [Weston](https://wayland.pages.freedesktop.org/weston/) compositor, which creates its own window and renders the incoming video frames in the window. - **[qtimlsnpe](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlsnpe.html)** The qtimlsnpe plugin exposes the Qualcomm^®^ Neural Processing SDK capabilities (load and execute the models). - **[qtimltflite](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimltflite.html)** The qtimltflite plugin exposes the TensorFlow Lite capabilities (load and execute the TensorFlow Lite models) as a GStreamer plugin. - **[qtimlqnn](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlqnn.html)** The qtimlqnn plugin exposes the Qualcomm^®^ AI Engine Direct SDK capabilities (load and execute the Qualcomm Neural Network models) as a GStreamer plugin. - **[qtimlvclassification](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlvclassification.html)** The qtimlvclassification plugin processes output tensors of an image classification model from the ML inference plugin (such as qtimltflite, qtimlsnpe and qtimlqnn) into result of predictions. - **[qtimlvconverter](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlvconverter.html)** The qtimlvconverter plugin transforms the incoming video buffers into neural-network tensors while performing necessary format conversion and resizing in the process. To achieve these operations, the plugin leverages GPU hardware and ION/DMA allocated buffers. - **[qtimlvdetection](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlvdetection.html)** The qtimlvdetection plugin processes output tensors of an Object Detection model from the ML inference plugin (such as qtimltflite, qtimlsnpe and qtimlqnn) into result of predictions. - **[qtimlvsegmentation](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlvsegmentation.html)** The qtimlvsegmentation plugin processes output tensors of an image segmentation/depth estimation model from the ML inference plugin (such as qtimltflite, qtimlsnpe and qtimlqnn) into result of predictions. - **[qtimlvpose](https://docs.qualcomm.com/doc/80-70014-50/topic/qtimlvpose.html)** The qtimlvpose plugin processes output tensors of an Pose Estimation model from the ML inference plugin (such as qtimltflite, qtimlsnpe and qtimlqnn) into result of predictions. 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