Added MP4 audio embeds for Discord in AudioEmbed.py

Backend/Embeds.py

@@ -6,6 +6,7 @@ import re
 from pathlib import Path
 from urllib.parse import quote
 
+import AudioEmbed
 from Core import ResolvePath
 from Explorer import ClassifyFile, GetDirectoryNoteInfo
 from Groups import GuestGroupName
@@ -91,17 +92,25 @@ def BuildOgTags(RootName: str, RelativePath: str, IsDirectoryUrl: bool, BaseUrl:
         Tags.append(_MetaTag("og:video:type", GetMimeType(EntryPath)))
         Tags.append(_MetaTag("og:description", DefaultDescriptions["video"]))
     elif FileType == "audio":
-        # og:audio is the standard tag, but Discord doesn't play it. Discord
-        # does play og:video in an HTML5 player, which handles audio-only
-        # files too, so the audio is offered as both.
-        Tags.append(_MetaTag("og:type", "video.other"))
+        # og:audio is the standard tag, but Discord ignores it (and an
+        # og:video pointing at audio). It does play an MP4, so the audio is
+        # also offered as one: a still picture with the track (AudioEmbed.py).
         Tags.append(_MetaTag("og:audio", MediaUrl))
         Tags.append(_MetaTag("og:audio:secure_url", MediaUrl))
         Tags.append(_MetaTag("og:audio:type", GetMimeType(EntryPath)))
-        Tags.append(_MetaTag("og:video", MediaUrl))
-        Tags.append(_MetaTag("og:video:url", MediaUrl))
-        Tags.append(_MetaTag("og:video:secure_url", MediaUrl))
-        Tags.append(_MetaTag("og:video:type", GetMimeType(EntryPath)))
+        if AudioEmbed.IsAvailable():
+            AudioEmbed.PrepareInBackground(EntryPath)
+            VideoUrl = f"{BaseUrl}/public/embed/{quote(RootName)}/{EncodedPath}"
+            Tags.append(_MetaTag("og:type", "video.other"))
+            Tags.append(_MetaTag("og:video", VideoUrl))
+            Tags.append(_MetaTag("og:video:url", VideoUrl))
+            Tags.append(_MetaTag("og:video:secure_url", VideoUrl))
+            Tags.append(_MetaTag("og:video:type", "video/mp4"))
+            Tags.append(_MetaTag("og:video:width", str(AudioEmbed.FrameSize)))
+            Tags.append(_MetaTag("og:video:height", str(AudioEmbed.FrameSize)))
+            Tags.append(_MetaTag("og:image", f"{BaseUrl}/Icons/Icon.png"))
+        else:
+            Tags.append(_MetaTag("og:type", "music.song"))
         Tags.append(_MetaTag("og:description", DefaultDescriptions["audio"]))
     elif FileType == "image":
         Tags.append(_MetaTag("og:type", "website"))