ESP32 CAM : How to send good quality images via MQTT

Has anyone here ever used a ESP32 CAM to send an image via MQTT? I’d like to know what are the parameters to initialize the camera with (resolution, jpeg quality, etc.), because once I receive the camera on the other side, it’s highly compressed and to be frank really ugly.

I’m using FRAMESIZE_SVGA with jpeg quality of 12. I want the best of both worlds actually: I want a good quality image and I don’t want to overload the MQTT packet as I want to be able to receive the image faster. If resolution is high, it usually takes a few minutes to receive anything.

Here’s my camera’s config:

void initCamera() 
{
  // https://github.com/botabotlab/ESP32CAM-MQTT/blob/master/ESP32_Cam_MQTT/ESP32_Cam_MQTT.ino (initCamera and capturePicture)
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer   = LEDC_TIMER_0;
  config.pin_d0       = 5;
  config.pin_d1       = 18;
  config.pin_d2       = 19;
  config.pin_d3       = 21;
  config.pin_d4       = 36;
  config.pin_d5       = 39;
  config.pin_d6       = 34;
  config.pin_d7       = 35;
  config.pin_xclk     = 0;
  config.pin_pclk     = 22;
  config.pin_vsync    = 25;
  config.pin_href     = 23;
  config.pin_sscb_sda = 26;
  config.pin_sscb_scl = 27;
  config.pin_pwdn     = 32;
  config.pin_reset    = -1;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;

  // QVGA|CIF|VGA|SVGA|XGA|SXGA|UXGA
  // Change resolution of image here
  config.frame_size = FRAMESIZE_SVGA;
  config.jpeg_quality = 10;   
  config.fb_count     = 1;

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
}