diff --git a/lib/dash.js b/lib/dash.js
index 1ac581f..1593a8c 100644
--- a/lib/dash.js
+++ b/lib/dash.js
@@ -135,11 +135,20 @@ const parseLanguage = (representation, adaptationSet, fallbackLanguage) => {
   return language;
 };
 
+const identifierPattern = /\$([A-z]*)(?:(%0)([0-9]+)d)?\$/g;
+const identifierReplacement =
+  (values) => (match, identifier, format, width) => {
+    if (match === '$$') return '$';
+    if (typeof values[identifier] === 'undefined') return match;
+    const value = '' + values[identifier];
+    if (identifier === 'RepresentationID') return value;
+    if (!format) width = 1;
+    else width = parseInt(width, 10);
+    if (value.length >= width) return value;
+    return value.padStart(width, '0');
+  };
 const buildSegmentUrl = (template, fields) => {
-  let result = template;
-  for (const [key, value] of Object.entries(fields))
-    result = result.replace('$' + key + '$', value);
-  return result;
+  return template.replace(identifierPattern, identifierReplacement(fields));
 };
 
 const resolveSegmentTemplateUrls = (segmentTemplate, baseUrl, manifestUrl) => {
@@ -215,10 +224,6 @@ const parseSegmentsFromTemplate = (
     : DEFAULT_SEGMENTS_COUNT;
   const bandwidth = representation.get('bandwidth');
   const id = representation.get('id');
-
-  const sanitizeTemplate = (template) =>
-    template?.replace(/\$.*?(RepresentationID|Number|Time).*?\$/g, '$$$1$$');
-
   const segments = [];
   if (segmentTimeline) {
     segments.push(
@@ -230,9 +235,8 @@ const parseSegmentsFromTemplate = (
       ),
     );
   } else {
-    const template = sanitizeTemplate(segmentTemplate.get('media'));
     for (let i = startNumber; i < startNumber + segmentsCount; i++) {
-      const url = buildSegmentUrl(template, {
+      const url = buildSegmentUrl(segmentTemplate.get('media'), {
         Bandwidth: bandwidth,
         RepresentationID: id,
         Number: i,
@@ -241,9 +245,7 @@ const parseSegmentsFromTemplate = (
       segments.push({ url });
     }
   }
-  const initialization = sanitizeTemplate(
-    segmentTemplate.get('initialization'),
-  );
+  const initialization = segmentTemplate.get('initialization');
   if (initialization) {
     const url = buildSegmentUrl(initialization, {
       Bandwidth: bandwidth,
diff --git a/test/axinom.test.js b/test/axinom.test.js
index b97bf3d..4e0892e 100644
--- a/test/axinom.test.js
+++ b/test/axinom.test.js
@@ -13,7 +13,7 @@ test('axinom manifest parsing', async () => {
   const firstVideoSegment = firstVideoTrack.segments[1]; // Skip init
   strictEqual(
     firstVideoSegment.url,
-    'https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/5/1.m4s',
+    'https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/5/0001.m4s',
   );
 
   const firstSubtitleTrack = manifest.tracks.subtitles[0];
diff --git a/types/dasha.d.ts b/types/dasha.d.ts
index b2132da..daac1c5 100644
--- a/types/dasha.d.ts
+++ b/types/dasha.d.ts
@@ -145,8 +145,7 @@ export type SubtitleCodec =
   | 'TTML'
   | 'VTT'
   | 'STPP'
-  | 'fTTML'
-  | 'fVTT';
+  | 'WVTT';
 
 export interface SubtitleTrack extends Track {
   type: 'text';