ESP32-CAM buffer - android-camera

Question

When I initialize the camera I use this:
#include "esp_camera.h"
bool initCamera(){
Serial.print("Iniciando Cámara ...");
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
...
...
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
config.frame_size = FRAMESIZE_XGA;
config.jpeg_quality = 8;
config.fb_count = 1;
config.grab_mode = CAMERA_GRAB_LATEST; <<<<<<<
// camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK){
Serial.printf("... error 0x%x", err);
return false;
}
sensor_t *s = esp_camera_sensor_get();
Serial.println("... OK");
CAMARA_OK = true;
return true;
}
But when I ask for a capture:
static esp_err_t capture_handler(httpd_req_t *req){
cambiosConfiguracion(req);
camera_fb_t *fb = NULL;
esp_err_t res = ESP_OK;
fb = esp_camera_fb_get();
if (!fb){
Serial.println("Camera capture failed");
httpd_resp_send_500(req);
return ESP_FAIL;
}
...
the image it shows me is from before, it takes a delayed capture.
I want that when I ask for a capture, it gives me the one from that moment, not the one stored in the buffer

Answer 1

I have the same problem, I've been looking for the solution for days and although it seems to be fine, it doesn't do what it's supposed to do.
At the moment I am using this "trick":
fb = esp_camera_fb_get();
esp_camera_fb_return(fb);
fb = esp_camera_fb_get();
I ask for a capture, I discard it and then I ask for another one, which is current