Something strange with RAM consumption

[Deymos s]

I am developing a video wall for 32-64 streams, I faced the problem of
increasing memory when restarting streams I have an example illustrating my
problem. (Here is 2 branches with qt5 and qt6 realization)
Example: https://github.com/Deymoss/Rtsp-player

When I start the application, a pipeline is created, as a result, the
application initially takes 54MB of RAM, when I start the stream, the RAM
consumption increases to ~ 110 MB, when I close the stream, the memory is
not freed, when I run the same stream again, the amount of RAM increases to
120 MB, and so on, 36 streams eats 5 gb RAM for 12 hours, the same is true
for file files descriptors (I suspect BUS creates them)

How to properly clear the memory and all information about the stream when
closing?

Here are GST_TRACER and ASAN output:
0:00:30.915950297 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstProxyPad,
address=(gpointer)0x629000092380, description=(string)<sink:proxypad1>,
ref-count=(uint)1, trace=(string);

0:00:30.915977127 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstGhostPad,
address=(gpointer)0x62900008e2d0, description=(string)<'':sink>,
ref-count=(uint)1, trace=(string);

0:00:30.915992116 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstGLWrappedContext,
address=(gpointer)0x62500024f610, description=(string)<glwrappedcontext0>,
ref-count=(uint)1, trace=(string);

0:00:30.916002956 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstGLWindowX11,
address=(gpointer)0x6290000a2ba0, description=(string)<glwindowx11-0>,
ref-count=(uint)1, trace=(string);

0:00:30.916014989 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstGLDisplayX11,
address=(gpointer)0x62500024c650, description=(string)<gldisplayx11-1>,
ref-count=(uint)4, trace=(string);

0:00:30.916022784 79361 0x619000078350 TRACE             GST_TRACER :0::
object-alive, type-name=(string)GstGLContextGLX,
address=(gpointer)0x6250004340a0, description=(string)<glcontextglx0>,
ref-count=(uint)1, trace=(string);

** (rtsp-player:79361): WARNING **: 15:36:23.197: Leaks detected and logged
under GST_DEBUG=GST_TRACER:7

=================================================================
==79361==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 49152 byte(s) in 2 object(s) allocated from:
    #0 0x72a00c2b4887 in __interceptor_malloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x72a00bda1738 in g_malloc
(/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x5e738)

Direct leak of 8832 byte(s) in 1 object(s) allocated from:
    #0 0x72a00c2b4887 in __interceptor_malloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x729fffeaa7b3  (/lib/x86_64-linux-gnu/libGLX_mesa.so.0+0x317b3)

Direct leak of 2560 byte(s) in 10 object(s) allocated from:
    #0 0x72a00c2b4887 in __interceptor_malloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x72a00228ca21  (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x1fa21)

Direct leak of 56 byte(s) in 2 object(s) allocated from:
    #0 0x72a00c2b4887 in __interceptor_malloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x72a002275ce9  (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x8ce9)

Indirect leak of 608 byte(s) in 19 object(s) allocated from:
    #0 0x72a00c2b4a57 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    #1 0x72a00228f51e  (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x2251e)

Indirect leak of 198 byte(s) in 18 object(s) allocated from:
    #0 0x72a00c25b9a7 in __interceptor_strdup
../../../../src/libsanitizer/asan/asan_interceptors.cpp:454
    #1 0x72a00228c4f7 in FcValueSave
(/lib/x86_64-linux-gnu/libfontconfig.so.1+0x1f4f7)

SUMMARY: AddressSanitizer: 61406 byte(s) leaked in 52 allocation(s).
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