Encoder error： ”Qing buffer error: Device or resource busy “

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
8

Hi Allen,
Here is a suggestion to your case:

// get RGBA buffer via createNvBuffer()
iNativeBuffer->createNvBuffer(RGBA)
// convert to NV12 via NVBufferTransform()
NvBufferTransform(RGBA->NV12)

Here is the patch to 10_camera_recording

diff --git a/multimedia_api/ll_samples/samples/10_camera_recording/main.cpp b/multimedia_api/ll_samples/samples/10_camera_recording/main.cpp
index 6f531b8..a57f193 100644
--- a/multimedia_api/ll_samples/samples/10_camera_recording/main.cpp
+++ b/multimedia_api/ll_samples/samples/10_camera_recording/main.cpp
@@ -218,7 +218,7 @@ bool ConsumerThread::threadExecute()
     while (!m_gotError)
     {
         NvBuffer *buffer;
-        int fd = -1;
+        int fd = -1, fd1 = -1;
 
         struct v4l2_buffer v4l2_buf;
         struct v4l2_plane planes[MAX_PLANES];
@@ -266,11 +266,26 @@ bool ConsumerThread::threadExecute()
             interface_cast<NV::IImageNativeBuffer>(iFrame->getImage());
         if (!iNativeBuffer)
             ORIGINATE_ERROR("IImageNativeBuffer not supported by Image.");
-        fd = iNativeBuffer->createNvBuffer(STREAM_SIZE,
-                                           NvBufferColorFormat_YUV420,
+        fd1 = iNativeBuffer->createNvBuffer(STREAM_SIZE,
+                                           NvBufferColorFormat_ABGR32,
                                            (DO_CPU_PROCESS)?NvBufferLayout_Pitch:NvBufferLayout_BlockLinear);
         if (VERBOSE_ENABLE)
-            CONSUMER_PRINT("Acquired Frame. %d\n", fd);
+            CONSUMER_PRINT("Acquired Frame. %d\n", fd1);
+
+        NvBufferCreateParams input_params = {0};
+        input_params.payloadType = NvBufferPayload_SurfArray;
+        input_params.width = STREAM_SIZE.width();
+        input_params.height = STREAM_SIZE.height();
+        input_params.layout = NvBufferLayout_Pitch;
+        input_params.colorFormat = NvBufferColorFormat_NV12;
+        input_params.nvbuf_tag = NvBufferTag_CAMERA;
+        NvBufferCreateEx(&fd, &input_params);
+
+        NvBufferTransformParams transParams = {0};
+        transParams.transform_flag = NVBUFFER_TRANSFORM_FILTER;
+        transParams.transform_filter = NvBufferTransform_Filter_Smart;
+        NvBufferTransform(fd1, fd, &transParams);
+        NvBufferDestroy(fd1);
 
         if (DO_CPU_PROCESS) {
             NvBufferParams par;

We have verified it with

$ ./camera_recording -d 5 -c