Hi,

I would like to submit a new sample media file for inclusion in the FATE
suite.

*File:*

   -

   dummy_multistream.mkv (105 KB)

*Proposed path:*

   -

   fate-suite/mkv/dummy_multistream.mkv

*Description:*
Dummy video file containing a test pattern, sine audio, and two French
subtitle streams. The sample is intended for regression testing subtitle
stream selection in FFmpeg.

This file is needed to test code addressing the following issue:
https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/20149

The code is ready, and the tests are implemented, but they currently fail
on CI because the existing FATE suite does not include a sample with
multiple subtitle streams.

Please let me know if any additional information is required.
The file is new and does not replace any existing samples.

Regards,

Practice2001