Add closed captioning options (language and transcript)

The National Library of Medicine, as a U.S. Government agency, must make videos as accessible as possible. To that end, I integrated it, but I'm not using the Video module which does conversion because I haven't had time in my prototype to make it work, nor to train the web contributors to do video conversion.

I made the rendering sensitive to a "field_video_transcript" field, which probably is not a good patch, because it sort of presumes on a feature of the Video module that may or may not be present. With the "transcript" tag then in the formatting, it can also be manipulated through my template, although in this case I didn't need to do so.

Patch inline:

diff --git a/sites/all/modules/contrib/jw_player/jw_player.module b/sites/all/modules/contrib/jw_player/jw_player.module
index 4ccfb94..4143942 100644
--- a/sites/all/modules/contrib/jw_player/jw_player.module
+++ b/sites/all/modules/contrib/jw_player/jw_player.module
@@ -48,6 +48,7 @@ function jw_player_theme() {
         'playlist' => NULL,
         'preset' => '',
         'image' => '',
+        'transcript' => '',
         'html_id' => NULL,
         'options' => array(),
         'playlist_size' => JW_PLAYER_DEFAULT_PLAYLIST_SIZE,
@@ -273,7 +274,9 @@ function jw_player_field_formatter_view($entity_type, $entity, $field, $instance
     if ($images = field_get_items($entity_type, $entity, 'field_video_thumbnail')) {
       $element['#image'] = $images[0];
     }
-
+    if ($transcripts = field_get_items($entity_type, $entity, 'field_video_transcript')) {
+      $element['#transcript'] = $transcripts[0];
+    }
   }
   return $element;
 }
@@ -421,6 +424,9 @@ function template_preprocess_jw_player(&$variables) {
   if (isset($variables['sources'])) {
     $variables['config']['playlist'][0] = array();
     $variables['config']['playlist'][0]['image'] = file_create_url($variables['image']['uri']);
+    if (isset($variables['transcript'])) {
+      $variables['config']['playlist'][0]['tracks'][] = array('file'=>file_create_url($variables['transcript']['uri']));
+    }
     foreach ($variables['sources'] as $key => $source) {
       $variables['config']['playlist'][0]['sources'][$key]['file'] = file_create_url($source['uri']);
       if (isset($source['getid3']) && $source['getid3']['width'] > 0 && $source['getid3']['height'] > 0) {

I'll follow up to see whether there is any related work in the Video module, and let them know I want this feature. There's probably a way to do it that doesn't interact quite so much with the Video module.