Error reading image data (invalid argument) - Raspberry Pi Rev 1.3 connected to Raspberry Pi Zero 2W

[harsh adder]

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[chilly sand]

The part of creating buffer and read bytes is the following bellow:

int SendFrames(){
        allocator = make_shared<FrameBufferAllocator>(cameraconnection.camera);
        for (StreamConfiguration &streamConfig : *cameraconnection.config){
            int ret = allocator->allocate(streamConfig.stream());
            if(ret<0){
                cerr << "Can't allocate buffers" << endl;
                return -ENOMEM;
            }
        }

        if(cameraconnection.camera->start() < 0){
            cerr << "Failed to start the camera" << endl;
            return EXIT_FAILURE;
        }

        while(running){
            const auto &buffers = allocator->buffers(cameraconnection.stream);
            cout << "Allocated buffers: " << buffers.size() << endl;

            if(buffers.empty()){
                cerr << "Allocated buffers are empty, waiting ..." << endl;
                usleep(100000);
                continue;
            }

            unique_ptr<Request> request = cameraconnection.camera->createRequest();
            if(!request){
                cerr << "Failed to create the request" << endl;
                continue;
            } else {
                cout << "Request created successfully" << endl;
            }

 FrameBuffer *frameBuffer = buffers[0].get();
            if(!frameBuffer){
                cerr << "Frame buffer is null" << endl;
                continue;
            }

            request->addBuffer(cameraconnection.stream, frameBuffer);
            if(cameraconnection.camera->queueRequest(request.get()) < 0){
                cerr << "Failed to queue request" << endl;
                continue;
            }

            request->status();

            const auto &planes = frameBuffer->planes();  // object plane to adquire image data after the request
            if(!planes.empty()){
                const auto &plane = planes[0];
                if(plane.length <= 0){
                    cerr << "Invalid plane length: " << plane.length << endl;
                    continue;
                }

                vector<unsigned char> image_data(plane.length);  

                // GET THE IMAGE DATA
                int fd_value = plane.fd.get();
                cout << "Checking fd value:" << fd_value << endl;

                if(fd_value < 0){
                    cerr << "Invalid file descriptor (FD: " << fd_value << ")" << endl;
                    continue;
                }

                ssize_t bytes_read = read(fd_value, image_data.data(), plane.length);
                if (bytes_read == -1) {
                    perror("Failed to read image data");
                    cerr << "Error reading image data. FD: " << fd_value
                        << ", length: " << plane.length << endl;
                    continue;
                }

        ```

                image_data.resize(static_cast<size_t>(bytes_read));

                if(bytes_read <= 0){
                    cerr << "No data read. Bytes read: " << bytes_read << endl;
                    continue;
                }
                
                if(!BytesToSend(socketconnection, image_data)){
                    cerr << "Failed to send image data" << endl;
                } else {
                    cout << "Data sent" << endl;
                }

            } else {
                cerr << "No planes available for frame" << endl;
            }
        }
        return 0;
    }

(OBS.: I'm new coding with C++, so I accept suggestions to improve it)

[vague glade]

why did you give it an invalid argument?