Memory leaks

I've build this project and it works fine with one critical exception:
When playing a long avi (exceeds 30 minutes), fps drops and the reduction gets worse and worse, untill it stalls. Possibly reason is a memory leak?
So i've put the code into deepseek + it returned some memory leaks. Resolving these leaks, the avi can be a bit longer now (10..20%), but ultimately fps still falls and stalls. It is not a final solution.
I also played with core priority and the amount of memory assigned to each core, with no major improvement.
Has anybody experienced the same problem? Does anybody know a solution?
I'm using a D1 mini esp32 without psram + tft 160x128 st7735 + platform IO.

The issue names no source files, tests, or entry points. Start by reproducing the worsening FPS during a long AVI on the D1 mini ESP32 with the ST7735 display, then inspect memory use and playback behavior. Done means identifying the cause of the stall and demonstrating sustained playback without progressive slowdown.

Written by the indexing model from the issue text.