The Matroska muxer has always mapped the title tag to the FileDescription element for attachments streams since support for writing attachments was added in commit c7a63a521b5c165405e3577751d649529d09f0c5. This commit merely documents this fact.
Unified · Split
| @@ -1314,7 +1314,8 @@ The recognized metadata settings in this muxer are: · 1313 unmodified lines | ||
| 1314 | 1314 | |
| 1315 | 1315 | @table @option |
| 1316 | 1316 | @item title |
| 1317 | −Set title name provided to a single track. | |
| 1317 | +Set title name provided to a single track. This gets mapped to | |
| 1318 | +the FileDescription element for a stream written as attachment. | |
| 1318 | 1319 | |
| 1319 | 1320 | @item language |
| 1320 | 1321 | Specify the language of the track in the Matroska languages form. |