I found this forum bugreport concerned Cingg 64 bit x86 Appimage for Debian 11

https://www.linux.org.ru/forum/multimedia/16944076?lastmod=1660280725246

Answer was found by reporter, simply setting

ulimit -n 4096

Fixed crash on media  load ....

On my termux 'ulimit -a' reports among other things:

open files (-n) 32768

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