User_meta->base_meta.meta_type, NVDS_USER_META_REID are not being equivalent

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

**• Hardware Platform (Jetson / GPU): RTX A2000
**• DeepStream Version: 6.3
• JetPack Version (valid for Jetson only)
**• TensorRT Version: 8.6.1
**• NVIDIA GPU Driver Version (valid for GPU only): 535.171.04

I am trying to collect REID-tensor embedding. But my user_meta->base_meta.meta_type, NVDS_USER_META_REID are not matching. Is this a problem of configuration?
user_meta->base_meta.meta_type=12979
NVDS_USER_META_REID=12980

From the source video I can that the object is being tracked.

write_reid_track_output (AppCtx * appCtx, NvDsBatchMeta * batch_meta)
{
  if (!appCtx->config.reid_track_dir_path)
    return;

   // printf("Writing reid tracking data\n");

  gchar reid_file[1024] = { 0 };
  FILE *reid_params_dump_file = NULL;
  /** Find batch reid tensor in batch user meta. */
  NvDsReidTensorBatch *pReidTensor = NULL;
  for (NvDsUserMetaList *l_batch_user = batch_meta->batch_user_meta_list; l_batch_user != NULL;
      l_batch_user = l_batch_user->next) {
    NvDsUserMeta *user_meta = (NvDsUserMeta *) l_batch_user->data;
    if (user_meta && user_meta->base_meta.meta_type == NVDS_TRACKER_BATCH_REID_META) {
    printf("user_meta->base_meta.meta_type == NVDS_TRACKER_BATCH_REID_META\n");
      pReidTensor = (NvDsReidTensorBatch *) (user_meta->user_meta_data);
    }
  }
3

which sample are you testing or referring to? there is only a NVDS_TRACKER_BATCH_REID_META in DeepStream code. how did you create this NVDS_USER_META_REID?

4

I apologize. I gave the wrong snippet. That was something I am still trying to do. Anyway, I have updated the code snippet. I am running the deepstream_app.c. Here I am always getting
user_meta->base_meta.meta_type and NVDS_TRACKER_BATCH_REID_META with 1 difference. Working fine in my Jetson nano. But in my PC as I’ve given the configuration the problem is occurring.

5

maybe there are other type of usermeta? could you print the value of user_meta->base_meta.meta_type and NVDS_TRACKER_BATCH_REID_META? from the code of nvdsmeta.h, the value of NVDS_TRACKER_BATCH_REID_META is 16, why is it 12980 in your code?

6

Sorry. The value is from the previous example I was referring to. The deepstream_app.c I am running is showing user_meta->base_meta.meta_type=15 and NVDS_TRACKER_BATCH_REID_META= 16. I am using the nvDFC traker and accuray config.

7

please refer to nvdsmeta.h in DeepStream SDK. type 15 represents NVDS_TRACKER_PAST_FRAME_META. it is not used to save REID.

8

I have solved it. Thank you for the help.

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9

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