Comment 33 for bug 1846374

It also happens with driver nvidia-340.108 in elementary OS 5.1.6 Hera.
In my case the error happens with VLC when trying to open the Hikvision rstp streaming (H264), the error lines run fast but stop when closing VLC.

I leave some lines of the error.

VLC media player 3.0.11 Vetinari (revision 3.0.11-0-gdc0c5ced72)
[0000564386f97a00] main libvlc: Ejecutar vlc con la interfaz predeterminada. Use «cvlc» para usar vlc sin interfaz.
Qt: Session management error: None of the authentication protocols specified are supported
QApplication: invalid style override 'adwaita' passed, ignoring it.
 Available styles: Breeze, Windows, Fusion
[0000564386f8d3c0] main playlist: playlist is empty
[00007fc12c04aee0] main decoder error: buffer deadlock prevented
MultiFramedRTPSource::doGetNextFrame1(): The total received frame size exceeds the client's buffer size (250000). 70154 bytes of trailing data will be dropped!
MultiFramedRTPSource::doGetNextFrame1(): The total received frame size exceeds the client's buffer size (500000). 100677 bytes of trailing data will be dropped!
[h264 @ 0x7fc13000a4e0] illegal memory management control operation 13
[00007fc1340020b0] egl_x11 gl error: cannot select OpenGL API
[00007fc12c04aee0] avcodec decoder: Using NVIDIA VDPAU Driver Shared Library 340.108 Wed Dec 11 14:31:24 PST 2019 for hardware decoding
[h264 @ 0x7fc13000a4e0] Failed setup for format vdpau: hwaccel initialisation returned error.
[00007fc12c04aee0] avcodec decoder error: existing hardware acceleration cannot be reused
[h264 @ 0x7fc13000a4e0] top block unavailable for requested intra mode -1
[h264 @ 0x7fc13000a4e0] error while decoding MB 2 0, bytestream 668
[h264 @ 0x7fc130026900] Missing reference picture, default is 65530
[h264 @ 0x7fc130026900] Missing reference picture, default is 65530
[h264 @ 0x7fc13002dec0] Missing reference picture, default is 65526
[h264 @ 0x7fc13002dec0] Missing reference picture, default is 65526
[h264 @ 0x7fc13008ab20] Missing reference picture, default is 65528
[h264 @ 0x7fc13008ab20] Missing reference picture, default is 65528
[h264 @ 0x7fc1300a6aa0] cabac_init_idc 3 overflow
[h264 @ 0x7fc1300a6aa0] decode_slice_header error
[h264 @ 0x7fc1300a6aa0] Missing reference picture, default is 65530
[h264 @ 0x7fc1300a6aa0] Missing reference picture, default is 65530
[h264 @ 0x7fc13000a4e0] illegal modification_of_pic_nums_idc 6
[h264 @ 0x7fc13000a4e0] decode_slice_header error
[h264 @ 0x7fc130026900] Missing reference picture, default is 65531
[h264 @ 0x7fc130026900] Missing reference picture, default is 65531
[h264 @ 0x7fc13002dec0] Missing reference picture, default is 65532
[h264 @ 0x7fc13002dec0] Missing reference picture, default is 65532
[h264 @ 0x7fc13008ab20] Missing reference picture, default is 65534
[h264 @ 0x7fc13008ab20] Missing reference picture, default is 65534
[h264 @ 0x7fc1300a6aa0] Missing reference picture, default is 65536
[h264 @ 0x7fc1300a6aa0] Missing reference picture, default is 65536
[h264 @ 0x7fc13000a4e0] cabac_init_idc 3 overflow
[h264 @ 0x7fc13000a4e0] decode_slice_header error
[00007fc138078d00] freetype spu text error: LayoutParagraph(): Invalid max width
[00007fc138078d00] freetype spu text error: LayoutParagraph(): Invalid max width
[h264 @ 0x7fc13000a4e0] Missing reference picture, default is 65538
[h264 @ 0x7fc13000a4e0] Missing reference picture, default is 65538
[h264 @ 0x7fc130026900] reference count overflow
[h264 @ 0x7fc130026900] decode_slice_header error