Jetson Nano CSI Raspberry Pi Camera V2 upside down video when run an example with deepstream-app

Autonomous Machines Jetson & Embedded Systems Jetson Nano
7

Hi,
Please use NvBufSurface APIs. Below is a patch for reference:
sources\apps\apps-common\src\deepstream_source_bin.c:

@@ -22,6 +22,8 @@
 
 #include <string.h>
 
+#include "nvbufsurface.h"
+#include "nvbufsurftransform.h"
 #include "gstnvdsmeta.h"
 #include "deepstream_common.h"
 #include "deepstream_sources.h"
@@ -62,6 +64,64 @@ set_camera_v4l2_params (NvDsSourceConfig * config, NvDsSrcBin * bin)
   return TRUE;
 }
 
+static GstPadProbeReturn
+nvargus_src_pad_buffer_probe (GstPad * pad, GstPadProbeInfo * info,
+    gpointer u_data)
+{
+    GstBuffer *buf = (GstBuffer *) info->data;
+    GstMapInfo outmap = GST_MAP_INFO_INIT;
+    gst_buffer_map (buf, &outmap, GST_MAP_WRITE);
+    NvBufSurface*  surface = (NvBufSurface *)outmap.data;
+
+    NvBufSurfTransformRect src_rect, dst_rect;
+    src_rect.top   = 0;
+    src_rect.left  = 0;
+    src_rect.width = (guint) surface->surfaceList[0].width;
+    src_rect.height= (guint) surface->surfaceList[0].height;
+
+    dst_rect.top   = 0;
+    dst_rect.left  = 0;
+    dst_rect.width = (guint) surface->surfaceList[0].width;
+    dst_rect.height= (guint) surface->surfaceList[0].height;
+
+    NvBufSurface *dst_surface = NULL;
+    NvBufSurfaceCreateParams nvbufsurface_create_params;
+
+    nvbufsurface_create_params.gpuId  = surface->gpuId;
+    nvbufsurface_create_params.width  = (gint) surface->surfaceList[0].width;
+    nvbufsurface_create_params.height = (gint) surface->surfaceList[0].height;
+    nvbufsurface_create_params.size = 0;
+    nvbufsurface_create_params.colorFormat = surface->surfaceList[0].colorFormat;
+    nvbufsurface_create_params.layout = surface->surfaceList[0].layout;
+    nvbufsurface_create_params.memType = surface->memType;
+
+    NvBufSurfaceCreate(&dst_surface,1,&nvbufsurface_create_params);
+
+    NvBufSurfTransformParams nvbufsurface_params;
+    nvbufsurface_params.src_rect = &src_rect;
+    nvbufsurface_params.dst_rect = &dst_rect;
+    nvbufsurface_params.transform_flag =  0;
+    nvbufsurface_params.transform_filter = NvBufSurfTransformInter_Default;
+
+    NvBufSurfTransformConfigParams transform_config_params;
+    NvBufSurfTransform_Error err;
+
+    transform_config_params.compute_mode = NvBufSurfTransformCompute_Default;
+    transform_config_params.gpu_id = surface->gpuId;
+    transform_config_params.cuda_stream = NULL;
+    err = NvBufSurfTransformSetSessionParams (&transform_config_params);
+    // copy to dst_surface
+    err = NvBufSurfTransform (surface, dst_surface, &nvbufsurface_params);
+    // rototate 180 degree to original surface
+    nvbufsurface_params.transform_flag =  NVBUFSURF_TRANSFORM_FLIP;
+    nvbufsurface_params.transform_flip = NvBufSurfTransform_Rotate180;
+    err = NvBufSurfTransform (dst_surface, surface, &nvbufsurface_params);
+    NvBufSurfaceDestroy(dst_surface);
+
+    gst_buffer_unmap (buf, &outmap);
+    return GST_PAD_PROBE_OK;
+}
+
 static gboolean
 create_camera_source_bin (NvDsSourceConfig * config, NvDsSrcBin * bin)
 {
@@ -144,12 +204,16 @@ create_camera_source_bin (NvDsSourceConfig * config, NvDsSrcBin * bin)
     NVGSTDS_BIN_ADD_GHOST_PAD (bin->bin, bin->cap_filter, "src");
 
   } else {
+    GstPad *src_pad;
 
     g_object_set (G_OBJECT (bin->cap_filter), "caps", caps, NULL);
 
     gst_bin_add_many (GST_BIN (bin->bin), bin->src_elem, bin->cap_filter, NULL);
 
     NVGSTDS_LINK_ELEMENT (bin->src_elem, bin->cap_filter);
+    src_pad = gst_element_get_static_pad (bin->src_elem, "src");
+    gst_pad_add_probe (src_pad, GST_PAD_PROBE_TYPE_BUFFER,
+        nvargus_src_pad_buffer_probe, NULL, NULL);
 
     NVGSTDS_BIN_ADD_GHOST_PAD (bin->bin, bin->cap_filter, "src");
   }

sources\apps\sample_apps\deepstream-app\Makefile

@@ -24,6 +24,7 @@ APP:= deepstream-app
 
 TARGET_DEVICE = $(shell gcc -dumpmachine | cut -f1 -d -)
 
+CUDA_VER:=10.0
 NVDS_VERSION:=4.0
 
 LIB_INSTALL_DIR?=/opt/nvidia/deepstream/deepstream-$(NVDS_VERSION)/lib/
@@ -41,10 +42,10 @@ PKGS:= gstreamer-1.0 gstreamer-video-1.0 x11
 
 OBJS:= $(SRCS:.c=.o)
 
-CFLAGS+= -I../../apps-common/includes -I../../../includes -DDS_VERSION_MINOR=0 -DDS_VERSION_MAJOR=4
+CFLAGS+= -I../../apps-common/includes -I../../../includes -DDS_VERSION_MINOR=0 -DDS_VERSION_MAJOR=4 -I /usr/local/cuda-$(CUDA_VER)/include
 
 LIBS+= -L$(LIB_INSTALL_DIR) -lnvdsgst_meta -lnvds_meta -lnvdsgst_helper -lnvds_utils -lm \
-       -lgstrtspserver-1.0 -lgstrtp-1.0 -Wl,-rpath,$(LIB_INSTALL_DIR)
+       -lgstrtspserver-1.0 -lgstrtp-1.0 -Wl,-rpath,$(LIB_INSTALL_DIR) -lnvbufsurface -lnvbufsurftransform
 
 CFLAGS+= `pkg-config --cflags $(PKGS)`
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