I have a camera sensor attached to a rover in my gazebo world. The output of the camera (photos) is saved to a location on my computer, and I convert the photos into a video. However, the framerate of the video is extremely poor (one frame maybe every five seconds). Anyone have any idea why this is? Code is attached below. Seems like some of it may be cutoff in the preview (physics part at the start), not sure why. I am new to Gazebo and did not write most of this code:

<?xml version="1.0"?> quick 100 1.0 0.0 0.9 0.1 0.0 -1 0.0020

<scene>
  <sky>
    <clouds>
      <speed>12</speed>
    </clouds>
  </sky>
  <ambient>0.4 0.4 0.4 1</ambient>
  <background>0.25 0.25 0.25 1</background>
</scene>


<model name="ground_plane">
  <static>true</static>
  <link name="link">
    <collision name="collision">
      <geometry>
        <plane>
          <normal>0 0 1</normal>
          <size>5000 5000</size>
        </plane>
      </geometry>
      <surface>
        <friction>
          <ode>
            <mu>1</mu>
            <mu2>1</mu2>
          </ode>
        </friction>
      </surface>
    </collision>
    <visual name="runway">
      <pose>000 0 0.005 0 0 0</pose>
      <cast_shadows>false</cast_shadows>
      <geometry>
        <plane>
          <normal>0 0 1</normal>
          <size>1829 45</size>
        </plane>
      </geometry>
      <material>
        <script>
          <uri>file://media/materials/scripts/gazebo.material</uri>
          <name>Gazebo/Runway</name>
        </script>
      </material>
    </visual>

    <visual name="grass">
      <pose>0 0 -0.1 0 0 0</pose>
      <cast_shadows>false</cast_shadows>
      <geometry>
        <plane>
          <normal>0 0 1</normal>
          <size>5000 5000</size>
        </plane>
      </geometry>
      <material>
        <script>
          <uri>file://media/materials/scripts/gazebo.material</uri>
          <name>Gazebo/Grass</name>
        </script>
      </material>
    </visual>

  </link>
</model>

<include>
  <uri>model://sun</uri>
</include>
<light name='user_directional_light_0' type='directional'>
  <pose>0 0 1 0 0 0</pose>
</light>
<model name="rover">
  <include>
    <uri>model://mars_rover</uri>
  </include>
  <link name='camera'>
    <pose>0 0 0.55 1.57 0 1.57</pose>
    <inertial>
      <pose>0 0 0 0 0 0</pose>
      <mass>0.1</mass>
      <inertia>
        <ixx>0.001</ixx>
        <ixy>0</ixy>
        <ixz>0</ixz>
        <iyy>0.001</iyy>
        <iyz>0</iyz>
        <izz>0.001</izz>
      </inertia>
    </inertial>
    <visual name='visual'>
      <pose>0 0 0 0 0 0</pose>
      <geometry>
        <cylinder>
          <radius>0.025</radius>
          <length>0.025</length>
        </cylinder>
      </geometry>
       <material>
        <script>
          <uri>file://media/materials/scripts/gazebo.material</uri>
          <name>Gazebo/Grey</name>
        </script>
      </material>
    </visual>

    <sensor name="camera" type="camera">
      <pose>0 0 0 -1.57 -1.57 0</pose>
  <camera>
    <save enabled="true">
    <path>/tmp/rover_videos</path>
    </save>
        <horizontal_fov>1.0472</horizontal_fov>
        <image>
          <width>640</width>
          <height>480</height>
        </image>
        <clip>
          <near>0.05</near>
          <far>1000</far>
        </clip>
      </camera>
      <always_on>1</always_on>
      <update_rate>30</update_rate>
      <visualize>true</visualize>
    </sensor>

  </link>
</model>