Problem in converting mp4 video frames to kv log

Hi, I am a beginner and trying to convert a mp4 video to kv logging format for free space segmentation. here is part of my code after referring to Converting video frames in proto

Test_conver.cpp:
void Test_convert::tick() {
cap.read(image_);
if (image_.empty()){
LOG_INFO(“Done recording”);
return;
}
auto output = tx_video_frames().initProto();
output.setCols(image_.cols);
output.setRows(image_.rows);
output.setChannels(3);
isaac::Image3ub output_image(image_.cols,image_.rows);//create a new 3 channels image
cv::Mat image = cv::Mat(image_.rows, image_.cols, CV_8UC3, const_cast<void*>(static_cast<const void*>(output_image.data().pointer())));//point the mat to proto
//modify your cv Mat there
image = image_;
ToProto(std::move(output_image), output, tx_video_frames().buffers());
tx_video_frames().publish();
}

test_convert.app.json:
{
“name”: “test_convert”,
“modules”: [
“//packages/testing/test_convert:test_convert_components”
],
“graph”: {
“nodes”: [
{
“name”: “test_convert”,
“components”: [
{
“name”: “message_ledger”,
“type”: “isaac::alice::MessageLedger”
},
{
“name”: “test_convert”,
“type”: “Test_convert”
}
]
},
{
“name”: “recorder”,
“components”: [
{
“name”: “MessageLedger”,
“type”: “isaac::alice::MessageLedger”
},
{
“name”: “Recorder”,
“type”: “isaac::cask::Recorder”
}
]
}
],
“edges”: [
{
“source”: “test_convert/test_convert/video_frames”,
“target”: “recorder/Recorder/video_frames”
}
]
},
“config”: {
“test_convert” : {
“test_convert” : {
“tick_period” : “30ms”
}
}
},
“recorder”: {
“Recorder”: {
“base_directory”: “/home/user/workspace/nvidia_isaac/sdk/apps/my_package/”,

      "start_recording_automatically": false
    }
  }

}

and I got:
ERROR external/com_nvidia_isaac_engine/engine/alice/backend/modules.cpp@295: packages/testing/test_convert/libtest_convert_components_module.so: …/test_convert/libtest_convert_components_module.so: undefined symbol: _ZN2cv6String8allocateEm
2021-09-03 10:57:29.274 PANIC external/com_nvidia_isaac_engine/engine/alice/backend/modules.cpp@297: Could not load all required modules for application.

After that, I try to include //third_party:opencv into the BUILD:
load("//bzl:module.bzl", “isaac_app”, “isaac_cc_module”)
isaac_cc_module(
name = “test_convert_components”,
srcs = [“Test_convert.cpp”],
hdrs = [“Test_convert.hpp”],
visibility = ["//visibility:public"],
deps = [
“//third_party:opencv”,
],
)

isaac_app(
name = “test_convert”,
modules = ["//packages/testing/test_convert:test_convert_components",
“message_generators”,
“sight”,
“viewers”,],
)
and got:
packages/testing/test_convert/libtest_convert_components_module.so: libopencv_imgcodecs.so.4.1: cannot open shared object file: No such file or directory
2021-09-03 16:57:40.417 PANIC external/com_nvidia_isaac_engine/engine/alice/backend/modules.cpp@297: Could not load all required modules for application

I can run the opencv tutorial so I not quite sure where could be the prob.
Thank you.