How to convert image in webp format programmatically?

We are giving an example for convert normal image to webp image format programmatically. Here all code/examples are already used in our projects.

Example:

use Drupal\image\Entity\ImageStyle;
use Drupal\media\Entity\Media;
use Drupal\responsive_background_image\ResponsiveBackgroundImage;

if ($tab_img = $tab_entity->get('field_image')->getValue()) {

          $tab_img = array_shift($tab_img);

          $mid = $tab_img['target_id'];

          $media = Media::load($mid);

          $fid = $media->field_image->target_id; 

          // if you want simple image url..

          $style = 'max_160w';  //pass image format

          $url = content_asset_image_url($fid, $style);

          $variables['tab_titles'][$tab['target_id']]['icon'] = $url;

          // if you want image convert into webp image format..

          $file = File::load($fid);

          $uri = $file->getFileUri();

          $variables['tab_titles'][$tab['target_id']]['icon']  = [

            '#theme' => 'responsive_image',

            '#responsive_image_style_id' => 'responsive_asset_300x300',  //pass responsive image format

            '#alt' => 'Resource Content Asset',

            '#uri' => $uri,

            // Add `#attributes` key with alt text.

            '#attributes' => [

              'data-lazy'=> TRUE,

            ],

          ];

        }

 // Content Asset function to get Image URL

function content_asset_image_url($file_id, $style_choice) {

  $file = File::load($file_id);

  $image_uri = $file->getFileUri();

  $style = ImageStyle::load($style_choice);

  $url = $style->buildUrl($image_uri);

  return $url;

}

Note: If have any suggestions or issue regarding 'How to convert image in webp format programmatically?' then you can ask by comments. 

Programmatically Media load in drupal 8.

If we want to load Media entity. we have to add library on the top of page. ( use Drupal\media\Entity\Media; )
Then its easy to load media entity by the syntax.
   
Syntax:
$media_detail = Media::load($mid);    // here $mid is media entity id       
   
now if we want to get image field data of media field then syntax is..

$media_img = file_create_url($media_detail->field_media_image->entity->getFileUri());
 // here field_media_image is field name in media entity
   
now if we want to get any text field value then syntax will be..

$media_caption = $media_detail->get('field_capt2120')->getValue();   
// here field_capt2120 is the machine name of caption field in media entity    

foreach($m_caption as $mkey){
   $capval = $mkey['value'];    // here we will get the caption value           
}


Note: If have any suggestions or issue regarding 'Programmatically Media load in drupal 8.' then you can ask by comments.