Add support for Apple HLS chapters

Author: Mtillmann

src/Formats/AppleHLS.js

@@ -6,6 +6,7 @@ export class AppleHLS extends FormatBase {
 
     filename = 'apple-hls.json';
     mimeType = 'application/json';
+    supportsPrettyPrint = true;
 
     titleLanguage = 'en';
     imageDims = [1280, 720];

src/Formats/ShutterEDL.js

@@ -68,7 +68,7 @@ export class ShutterEDL extends FormatBase {
             return acc;
         }, []);
 
-        output.unshift('TITLE: ' + this.meta.title);
+        output.unshift('TITLE: ' + (this.meta.title || 'Chapters'));
         return output.join("\n");
     }
 }

src/views/partials/exportDialog.pug

@@ -62,7 +62,11 @@ div.offcanvas.offcanvas-bottom#exportDialog(x-ref="exportDialog", style="--bs-of
                                 i.bi.bi-filetype-txt
                                 |
                                 | EDL
-
+                        li.nav-item
+                            a.nav-link(:class="{active : exportSettings.type === 'applehls'}", href="#", @click.stop.prevent="updateExportContent('applehls')")
+                                i.bi.bi-filetype-json
+                                |
+                                | Apple HLS chapters
                     div.row.flex-grow-1
                         div.col-8.d-flex.flex-column
                             textarea.flex-grow-1.overflow-visible.form-control(:value="exportContent", readonly, x-ref="outputTextarea")