Android Question ExoPlayer 3gp file

[Declan]

I am using the ExoPlayer library within my app.
I can load a file OK.
A MP4 file plays video fine.
However, a video taken with the internal camera creates a 3GP file.
ExoPlayer loads and plays the 3GP file, the audio plays but no video?

 

[Erel]

Can you upload a short video file (you can use the FTP feature of B4A-Bridge to copy it)?