Anything new on this issue? I just installed LibreELEC on a Raspberry PI 4 4GB last week using NOOBS and I got the same issue. My recording is 1920x1080 H.265 from Czech DVB-T2 taken using TVHeadend and stored on the SD card. It plays OK on a laptop using software decoding but crashes the hardware video decoder of the Raspberry always on the same spot. After that, hardware decoding does not start again, but MPEG2 still plays. The problem must be in the VideoCore 6 driver. Is there any way to help debug it? Overheating does not seem to be the issue. Increasing the video memory does not help. There is nothing in journalctl.