24MHz clock.

[josef2600]

so, do these:
in ESP32-CAM_MJPEG2SD.ino put some waits:

void setup() {
  delay(100);
  logSetup();
  delay(100);

in mjpeg2sd.cpp file:
in bool prepCam() :
add this:

  while (retries && err != ESP_OK) {
    err = esp_camera_init(&config);
    
    // Deinitialize the existing LEDC configuration
    ledc_stop(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 0);
    delay(10);
    // Configure the LEDC timer
    ledc_timer_config_t ledc_timer =
    {
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .duty_resolution = LEDC_TIMER_1_BIT,
      .timer_num = LEDC_TIMER_0,
      .freq_hz = config.xclk_freq_hz,
      .clk_cfg = LEDC_AUTO_CLK
    };
    if (ledc_timer_config(&ledc_timer) != ESP_OK)
    {
      LOG_ERR("mjpeg2sd.cpp - ledc_timer_config(&ledc_timer) != ESP_OK");
      delay(100);
    }
    // Configure the LEDC channel
    ledc_channel_config_t ledc_channel =
    {
      .gpio_num = XCLK_GPIO_NUM,
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .channel = LEDC_CHANNEL_0,
      .intr_type = LEDC_INTR_DISABLE,
      .timer_sel = LEDC_TIMER_0,
      .duty = 1,  // 50% duty cycle for 1-bit resolution
      .hpoint = 0
    };
    
    if (ledc_channel_config(&ledc_channel) != ESP_OK)
    {
      LOG_ERR("mjpeg2sd.cpp - ledc_channel_config(&ledc_channel) != ESP_OK");
      delay(100);
    }
    delay(2);
if (err != ESP_OK) {

now i can get 24MHz (or any clock) on XCLK_GPIO_NUM pin. i tested the camera with 24 MHz and it works.
sorry i cant create pull, since i need you to change something so i can update them. i don't know how to work with git !
but if you have no problem with the clock, and it works, then i need to go to change some settings on camera. i have to dissable internal regulator, for those who have external power. it is really hot!