Cannot open TTML subtitle files in their native file extensions
Abstract: The ability to use DFXP/TTML files is a new feature in the upcoming version of VLC (3.0.0-git). DFXP/TTML files are XML files that contain subtitle information. The most commonly used file extensions for these are .dfxp, .ttml, and .xml.
Problem: VLC will not use TTML subtitle files that have the .dfxp, .ttml, or .xml file extension. Such files are grayed out when attempting to use one.
How to reproduce problem:
- Open a video file in VLC.
- At the top menubar, click "Subtitles", and "Add Subtitle File..."
- Navigate to any .dfxp, .ttml, or .xml file. Notice that such files are grayed out and cannot be selected.
Temporary workaround: Renaming a TTML file to a .txt file extension will make the file selectable. VLC will then use the TTML file correctly.
Expected behavior: VLC should be able to use a DFXP/TTML file in any of its native file extensions (.dfxp, .ttml, or .xml).