cv::VideoCapture leaks memory on ethernet cams?

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Hello!

I have been noticing my software memory usage grows (slowly) over time.

I used to believe it was some kind of buffer. But after I let it running overnight, and it crashed because it was out of memory, I had to debug.

I found out if disable grab() and replace retrieve() for a still image, memory usage doesn't grow. A still image runs my algorithm normally.

My software uses 8 VideoCapture instances in RTSP Ethernet Cameras, each one in it's thread, at around 5FPS.

• After I re-enabled grab(), but not retrieve, the software grown 80MB in 1h23m.
• After I re-enabled grab and retrieve, the software grown 120MB in 16min.

Question is:

• Is there a way cv::VideoCapture leaks any memory, for rtsp ethernet cameras?
• Is there any kind of buffer I can configure?
• Is there any kind of "clean buffer" I am not aware of?

More info:

• I sometimes get an error : " [rtsp @ 0xXXXXXXXXXXXX] Too short data for FU-A H.264 RTP packet"
• I am using OpenCV 3.2 on Linux 64-bits.
• I have to do 5 grabs for 1 retrieve, so my image don't get delays.

Any help will be appreciated.