feat(mpeg-dash): add support for base URLs in generated HLS playlists

CHANGELOG

@@ -1,3 +1,8 @@
+== 8.1.0-beta.2 2025-07-17
+
+Fixes:
+* Added support for base URLs in HLS playlists generated via the `FFMPEG::DASH` classes.
+
 == 8.1.0-beta.1 2025-07-17
 
 Fixes:

lib/ffmpeg/dash/adaptation_set.rb

@@ -104,6 +104,9 @@ def to_m3u8mt(group_id: content_type, default: true, autoselect: true)
         return unless %w[audio video].include?(content_type)
         return unless representations.any?
 
+        url = "stream#{representations.first.id}.m3u8"
+        url = URI.join(representations.first.base_url, url).to_s if representations.first.base_url
+
         m3u8t(
           'EXT-X-MEDIA',
           'TYPE' => content_type.upcase,
@@ -112,7 +115,7 @@ def to_m3u8mt(group_id: content_type, default: true, autoselect: true)
           'LANGUAGE' => quote(lang || 'und'),
           'DEFAULT' => default ? 'YES' : 'NO',
           'AUTOSELECT' => autoselect ? 'YES' : 'NO',
-          'URI' => quote("stream#{representations.first.id}.m3u8")
+          'URI' => quote(url)
         )
       end
 

lib/ffmpeg/dash/representation.rb

@@ -169,14 +169,17 @@ def to_m3u8
       def to_m3u8si(audio_group_id: nil, video_group_id: nil)
         return unless %w[audio video].include?(@adaptation_set.content_type)
 
+        url = "stream#{id}.m3u8"
+        url = URI.join(base_url, url).to_s if base_url
+
         "#{m3u8t(
           'EXT-X-STREAM-INF',
           'BANDWIDTH' => bandwidth,
           'CODECS' => quote(codecs),
           'RESOLUTION' => resolution,
           'AUDIO' => quote(audio_group_id),
           'VIDEO' => quote(video_group_id)
-        )}\n#{"stream#{id}.m3u8"}"
+        )}\n#{url}"
       end
 
       private

lib/ffmpeg/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module FFMPEG
-  VERSION = '8.1.0-beta.1'
+  VERSION = '8.1.0-beta.2'
 end

spec/ffmpeg/dash/manifest_spec.rb

@@ -176,5 +176,14 @@
         M3U8
       end
     end
+
+    context 'with base URL set' do
+      it 'includes the base URL in the playlist URIs' do
+        manifest.base_url = 'http://example.com/'
+        is_expected.to include('http://example.com/stream0.m3u8')
+        is_expected.to include('http://example.com/stream1.m3u8')
+        is_expected.to include('http://example.com/stream2.m3u8')
+      end
+    end
   end
 end