Plugin Details:
Name vaapi
Description VA-API based elements
Filename /opt/intel/openvino_2020.2.120/data_processing/gstreamer/lib/gstreamer-1.0/libgstvaapi.so
Version 1.16.2
License LGPL
Source module gstreamer-vaapi
Binary package gstreamer-vaapi
Origin URL http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer
Launching RTSP encoded stream with the following pipeline: ( videotestsrc ! videoscale ! video/x-raw,width=1280,height=720 ! capsfilter ! queue ! x264enc speed-preset=superfast ! rtph264pay name=pay0 pt=96 )
Gstreamer Pipleline used to decode the frame and read the buffer into application from appsink: ( rtspsrc location=rtsp://localhost:8554/live.sdp latency=100 ! rtph264depay ! h264parse ! vaapih264dec ! vaapipostproc format=bgr ! videoconvert ! video/x-raw,format=BGR ! appsink )
The above gstreamer pipeline does not work and produced the following failure when tested with gst-launch-1.0 tool in GST_DEBUG mode:
```
0:00:02.229807981 21492 0x7f32040034f0 WARN basetransform gstbasetransform.c:1371:gst_base_transform_setcaps:<vaapipostproc0> FAILED to configure incaps video/x-raw(memory:VASurface), format=(string)NV12, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1 and outcaps video/x-raw, width=(int)1280, height=(int)720, framerate=(fraction)30/1, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, format=(string)BGR, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, colorimetry=(string)sRGB
```
The vaapipostproc element works with `format=bgrx` and then videoconvert can be used to force the pixel format to BGR. But we would want the element to work with `format=bgr` itself (as bgr format is mentioned in the plugin inspect) and avoid the overhead caused by videoconvert element.
