fix all_artists in music video credits template (#984)

CHANGELOG.md

@@ -14,7 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Templates should be copied from `_default.ass.sbntxt` which is located in the config subfolder `templates/music-video-credits`
     - Copy the file, give it any name ending with `.ass.sbntext`, and only make edits to the copied file
   - The default template will be extracted and overwritten every time ErsatzTV is started
-  - The template is a [Sub Station Alpha](http://www.tcax.org/docs/ass-specs.htm) file using [scribian](https://github.com/scriban/scriban/tree/master/doc) template syntax
+  - The template is an [Advanced SubStation Alpha](http://www.tcax.org/docs/ass-specs.htm) file using [scribian](https://github.com/scriban/scriban/tree/master/doc) template syntax
   - The following fields are available for use in the template:
     - `resolution`: the ffmpeg profile's resolution, which is used for margin calculations
     - `title`: the title of the music video

ErsatzTV.Application/Streaming/Queries/GetPlayoutItemProcessByChannelNumberHandler.cs

@@ -93,6 +93,9 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
             .ThenInclude(mi => (mi as MusicVideo).MusicVideoMetadata)
             .ThenInclude(mvm => mvm.Subtitles)
             .Include(i => i.MediaItem)
+            .ThenInclude(mi => (mi as MusicVideo).MusicVideoMetadata)
+            .ThenInclude(mvm => mvm.Artists)
+            .Include(i => i.MediaItem)
             .ThenInclude(mi => (mi as MusicVideo).MediaVersions)
             .ThenInclude(mv => mv.MediaFiles)
             .Include(i => i.MediaItem)

ErsatzTV/Resources/Templates/_default.ass.sbntxt

@@ -5,9 +5,11 @@ ScaledBorderAndShadow: yes
 YCbCr Matrix: None
 PlayResX: {{ resolution.width }}
 PlayResY: {{ resolution.height }}
+
 [V4+ Styles]
-Format: Name, Fontname, Fontsize, PrimaryColour, OutlineColour, BorderStyle, Outline, Shadow, Alignment, Encoding
-Style: Default,OPTIKabel-Heavy,{{ resolution.height // 20.0 }},&HFFFFFF,&H444444,1,1,3,0,1
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,OPTIKabel-Heavy,{{ resolution.height // 20.0 }},&HFFFFFF,&HFFFFFF,&H444444,&H00000000,0,0,0,0,100,100,0,0,1,1,3,0,10,10,10,1
+
 [Events]
 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
 Dialogue: 0,00:00:09.00,00:00:16.00,Default,,{{ resolution.width * 0.03 | math.round }},{{ resolution.width * 0.03 | math.round }},{{ resolution.height * 0.05 | math.round }},,{fad(1200, 1200)}{{ if all_artists | array.size == 0 }}{{ artist }}{{ else }}{{ all_artists | array.join " / " }}{{ end }}\N"{{ title }}"{{ if album }}\N{{ album }}{{ end }}