You can fix ownership issues by doing this (as the user MC is supposed to run under) at a prompt:
cd ; touch ugidfile ; sudo chown -R --reference=ugidfile .jriver
There are potential issues with filesystem characters. Does that seem like it could be an issue with the files that don't play?
In MC what is in the "compression" field of a file that won't play?
Other videos play, not mkv?
Finally, you are trying to play in the MC gui and not by double clicking on a file with the file manager, correct?
I got your e-mail. too bad I am unable to get mkv to play directly on the PC at this end.
I did compare the fileAssociations.xml for Windows with Linux, I see no issues with corruption,(I maybe wrong). The video sections of both are the same. The mkv area is exactly the same, this is what puzzles me, it is fine on MC for Windows, but not for Linux.
At this point, I thought of deleting the xml, but not possible.
Just thinking out loud: next update, anyway to make the code inspect the xml, if it is found to be corrupt, will alert the installer to allow over writing, same for database read only error, if the MC database is read only, will also alert and ask permission to "reset". Note. I ran the instruction you sent "cd; touch....) I got no error .
I do not know what is wrong.
Also, this add on request. Anyway to ask installer to select drive or folder to install? (Putting MC and the OS in same folder to me is not a good way. If the OS is corrupt, then you have to re-install MC
OR
Anyway to wipe out the entire MC installs then re-install the package?
Thanks for taking your time to help out. You can destroy or keep the sample I sent you.
George
Edit:
I again noticed when I placed a Samsung remote pointer on the cover art, it just will show a circle with a line across, meaning :"NO"
I also found out that Unity desktop produced an error It asked me to relaunch Unity.
I am beginning to think part of the issues is the "Read Only" Database mode.
If this read only mode can be corrected, it could fix the issue.
I ran the instruction you sent to me via the forum. I can not tell if it produced the desired result, as I received no error.
As a result of this mess, I just removed the entire MC21 installation after Ubuntu told me it is an unknown application.
I hope this removal will delete all folders and sub folders contained within MC install.
I will wait either for your next suggestion or from forum members on what to do.
I will stick with the Windows version.
Thanks.
George