- .m4a uploads are now accepted in add/edit, and M4A handling now keeps the original source while adding a generated black-frame H.264 MP4 companion source when ffmpeg can run.

The core conversion helper is in [includes/db.php (line 
1161)](/Users/tyemeclifford/Documents/GH/mediaplayer/includes/db.php:1161). 
The upload flows insert the converted MP4 first for playback and retain 
the original M4A as a separate source in [admin/add.php (line 
129)](/Users/tyemeclifford/Documents/GH/mediaplayer/admin/add.php:129) 
and [admin/edit.php (line 
172)](/Users/tyemeclifford/Documents/GH/mediaplayer/admin/edit.php:172). 
I also updated the admin upload hints, [README.md (line 
77)](/Users/tyemeclifford/Documents/GH/mediaplayer/README.md:77), and 
[changelog.md (line 
14)](/Users/tyemeclifford/Documents/GH/mediaplayer/changelog.md:14).

changelog.md

@@ -11,6 +11,7 @@ All notable changes to this media player project.
 - Added an admin upload flow that supports either direct uploads or external provider/page URLs.
 - Added metadata fetching for external URLs to populate title, description, duration, thumbnails, publish dates, and readable provider view counts where available.
 - Added automatic thumbnail grabbing for external URLs, plus first-frame thumbnail generation for local videos when `ffmpeg` is available.
+- Added M4A upload support that keeps the original M4A source and adds a generated black-frame H.264 MP4 source when `ffmpeg` is available.
 - Added a YouTube channel importer that scrapes channel videos, previews imports, skips duplicates, and stores imported videos as embedded YouTube sources.
 - Added YouTube timestamp correction so imported and existing YouTube videos can use their original publish dates.
 - Added an **Upkeeping** section to the admin dashboard for batch maintenance actions.