diff --git a/cmd/main.c b/cmd/main.c
index 39d92b3..6bc407a 100644
--- a/cmd/main.c
+++ b/cmd/main.c
@@ -24,20 +24,28 @@ http_method_t http_methods[] = {
 camera_options_t camera_options = {
   .path = "/dev/video0",
   .width = 1920,
-  .height = 720,
-  .format = 0,
+  .height = 1080,
+  .format = V4L2_PIX_FMT_SRGGB10P,
   .nbufs = 4,
   .fps = 30,
   .allow_dma = true
 };
 
 http_server_options_t http_options = {
-  .listen_port = 9092,
+  .port = 9092,
   .maxcons = 10
 };
 
 option_t all_options[] = {
-  DEFINE_OPTION(camera, width, "%d"),
+  DEFINE_OPTION_PTR(camera, path, "%s"),
+  DEFINE_OPTION(camera, width, uint),
+  DEFINE_OPTION(camera, height, uint),
+  DEFINE_OPTION(camera, format, uint),
+  DEFINE_OPTION(camera, nbufs, uint),
+  DEFINE_OPTION(camera, fps, uint),
+  DEFINE_OPTION(camera, allow_dma, bool),
+  DEFINE_OPTION(http, port, uint),
+  DEFINE_OPTION(http, maxcons, uint),
   {}
 };
 
@@ -48,6 +56,10 @@ int main(int argc, char *argv[])
   int ret = -1;
   const char *env;
 
+  if (parse_opts(all_options, argc, argv) < 0) {
+    return -1;
+  }
+
   if (env = getenv("DEBUG")) {
     log_debug = strstr(env, "1") ? 1 : 0;
   }
@@ -55,13 +67,13 @@ int main(int argc, char *argv[])
   camera_init(&camera);
   camera.options = camera_options;
 
-  //camera.width = 1920; camera.height = 1080;
-  strcpy(camera.options.path, "/dev/video2"); camera.options.width = 2328; camera.options.height = 1748; camera.options.format = V4L2_PIX_FMT_SRGGB10P; // 1164x874
-  //camera.width = 4656; camera.height = 3496;
-  //camera.width = 3840; camera.height = 2160;
-  //camera.width = 1280; camera.height = 720;
-  strcpy(camera.options.path, "/dev/video0"); camera.options.width = 1920; camera.options.height = 1080; camera.options.format = V4L2_PIX_FMT_YUYV; camera.options.format = V4L2_PIX_FMT_MJPEG; camera.options.allow_dma = false;
-  camera.options.nbufs = 1;
+  // //camera.width = 1920; camera.height = 1080;
+  // strcpy(camera.options.path, "/dev/video2"); camera.options.width = 2328; camera.options.height = 1748; camera.options.format = V4L2_PIX_FMT_SRGGB10P; // 1164x874
+  // //camera.width = 4656; camera.height = 3496;
+  // //camera.width = 3840; camera.height = 2160;
+  // //camera.width = 1280; camera.height = 720;
+  // strcpy(camera.options.path, "/dev/video0"); camera.options.width = 1920; camera.options.height = 1080; camera.options.format = V4L2_PIX_FMT_YUYV; camera.options.format = V4L2_PIX_FMT_MJPEG; camera.options.allow_dma = false;
+  // camera.options.nbufs = 1;
 
   if (camera_open(&camera) < 0) {
     goto error;
diff --git a/http/http.c b/http/http.c
index 7a1fabe..06226de 100644
--- a/http/http.c
+++ b/http/http.c
@@ -14,7 +14,7 @@
 
 #define BUFSIZE 256
 
-static int http_listen(int listen_port, int maxcons)
+static int http_listen(int port, int maxcons)
 {
   struct sockaddr_in server = {0};
   int listenfd = -1;
@@ -22,7 +22,7 @@ static int http_listen(int listen_port, int maxcons)
   // getaddrinfo for host
   server.sin_family = AF_INET;
   server.sin_addr.s_addr = INADDR_ANY;
-  server.sin_port = htons(listen_port);
+  server.sin_port = htons(port);
 
   listenfd = socket(AF_INET, SOCK_STREAM, 0);
   if (listenfd < 0) {
@@ -124,7 +124,7 @@ error:
 
 int http_server(http_server_options_t *options, http_method_t *methods)
 {
-  int listen_fd = http_listen(options->listen_port, options->maxcons);
+  int listen_fd = http_listen(options->port, options->maxcons);
   if (listen_fd < 0) {
     return -1;
   }
@@ -133,7 +133,7 @@ int http_server(http_server_options_t *options, http_method_t *methods)
 
   for (int worker = 0; worker < options->maxcons; worker++) {
     char name[20];
-    sprintf(name, "HTTP%d/%d", options->listen_port, worker);
+    sprintf(name, "HTTP%d/%d", options->port, worker);
 
     http_worker_t *worker = calloc(1, sizeof(http_worker_t));
     worker->name = strdup(name);
diff --git a/http/http.h b/http/http.h
index bd2d58f..ffc8d22 100644
--- a/http/http.h
+++ b/http/http.h
@@ -29,7 +29,7 @@ typedef struct http_worker_s {
 } http_worker_t;
 
 typedef struct http_server_options_s {
-  int listen_port;
+  int port;
   int maxcons;
 } http_server_options_t;
 
diff --git a/hw/buffer_list.c b/hw/buffer_list.c
index c8e52dd..d8cc4f4 100644
--- a/hw/buffer_list.c
+++ b/hw/buffer_list.c
@@ -89,11 +89,15 @@ retry:
     bytesperline = 0;
   }
 
+  E_LOG_DEBUG(buf_list, "Get current format ...");
+  E_XIOCTL(buf_list, buf_list->device->fd, VIDIOC_G_FMT, fmt, "Can't set format");
+
   if (buf_list->do_mplanes) {
     fmt->fmt.pix_mp.colorspace = V4L2_COLORSPACE_JPEG;
     fmt->fmt.pix_mp.width = width;
     fmt->fmt.pix_mp.height = height;
-    fmt->fmt.pix_mp.pixelformat = format;
+    if (format)
+      fmt->fmt.pix_mp.pixelformat = format;
     fmt->fmt.pix_mp.field = V4L2_FIELD_ANY;
     fmt->fmt.pix_mp.num_planes = 1;
     fmt->fmt.pix_mp.plane_fmt[0].bytesperline = bytesperline;
@@ -102,7 +106,8 @@ retry:
     fmt->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
     fmt->fmt.pix.width = width;
     fmt->fmt.pix.height = height;
-    fmt->fmt.pix.pixelformat = format;
+    if (format)
+      fmt->fmt.pix.pixelformat = format;
     fmt->fmt.pix.field = V4L2_FIELD_ANY;
     fmt->fmt.pix.bytesperline = bytesperline;
     //fmt->fmt.pix.sizeimage = bytesperline * orig_height;
@@ -138,7 +143,7 @@ retry:
     }
   }
 
-	if (buf_list->fmt_format != format) {
+	if (format && buf_list->fmt_format != format) {
 		E_LOG_ERROR(buf_list, "Could not obtain the requested format=%s; driver gave us %s",
 			fourcc_to_string(format).buf,
 			fourcc_to_string(buf_list->fmt_format).buf);
diff --git a/opts/opts.c b/opts/opts.c
new file mode 100644
index 0000000..a338b6f
--- /dev/null
+++ b/opts/opts.c
@@ -0,0 +1,74 @@
+#include "opts.h"
+#include "hw/v4l2.h"
+
+#include <stddef.h>
+#include <stdio.h>
+
+static void print_help(option_t *options)
+{
+  for (int i = 0; options[i].name; i++) {
+    printf("%20s ", options[i].name);
+
+    if (options[i].ptr) {
+      printf(options[i].format, options[i].ptr);
+    } else {
+      printf(options[i].format, *options[i].value);
+    }
+    printf("\n");
+  }
+}
+
+static int parse_opt(option_t *options, const char *key, const char *value)
+{
+  option_t *option = NULL;
+
+  for (int i = 0; options[i].name; i++) {
+    if (!strcmp(key, options[i].name)) {
+      option = &options[i];
+      break;
+    }
+  }
+
+  if (!option) {
+    return -EINVAL;
+  }
+
+  int ret = 0;
+  if (option->ptr) {
+    ret = sscanf(value, option->format, option->ptr);
+  } else {
+    ret = sscanf(value, option->format, option->value);
+  }
+  return ret;
+}
+
+int parse_opts(option_t *options, int argc, char *argv[])
+{
+  int arg;
+
+  for (arg = 1; arg < argc; arg += 2) {
+    const char *key = argv[arg];
+    if (!strcmp(key, "-help")) {
+      print_help(options);
+      return -1;
+    }
+
+    if (arg+1 == argc) {
+      E_LOG_ERROR(NULL, "The %s is missing argument.", key);
+    }
+
+    if (key[0] != '-') {
+      E_LOG_ERROR(NULL, "The '%s' is not option (should start with -).", key);
+    }
+
+    int ret = parse_opt(options, key+1, argv[arg+1]);
+    if (ret <= 0) {
+      E_LOG_ERROR(NULL, "Parsing '%s %s' returned '%d'.", key, argv[arg+1], ret);
+    }
+  }
+
+  return 0;
+
+error:
+  return -1;
+}
diff --git a/opts/opts.h b/opts/opts.h
new file mode 100644
index 0000000..084629c
--- /dev/null
+++ b/opts/opts.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <stdbool.h>
+
+typedef struct options_s {
+  const char *name;
+  void *ptr;
+  union {
+    unsigned *value;
+    unsigned *value_uint;
+    bool *value_bool;
+  };
+  const char *format;
+  const char *help;
+  unsigned size;
+} option_t;
+
+#define lambda(return_type, function_body) \
+({ \
+      return_type __fn__ function_body \
+          __fn__; \
+})
+
+#define OPTION_FORMAT_uint "%d"
+#define OPTION_FORMAT_bool "%d"
+
+#define DEFINE_OPTION(_section, _name, _type) \
+  { \
+    .name = #_section "-" #_name, \
+    .value_##_type = &_section##_options._name, \
+    .format = OPTION_FORMAT_##_type, \
+    .size = sizeof(_section##_options._name), \
+  }
+
+#define DEFINE_OPTION_PTR(_section, _name, _format) \
+  { \
+    .name = #_section "-" #_name, \
+    .ptr = _section##_options._name, \
+    .format = _format, \
+    .size = sizeof(_section##_options._name), \
+  }
+
+int parse_opts(option_t *options, int argc, char *argv[]);