Drop Frame in Rtsp Stream

Application Development
1

Hi
I have a problem with h264 decoding of rtsp video stream. it seems issue related to drop frame. you can see log & pipeline topology

Error Image

error_image
error_image1007×819 180 KB

Log

WARN             h264decoder gsth264decoder.c:939:gst_h264_decoder_handle_frame_num_gap:<d3d11h264dec1> Invalid frame num 17, maybe frame drop
WARN             h264decoder gsth264picture.c:439:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 16
WARN             h264decoder gsth264picture.c:1046:gst_h264_dpb_perform_memory_management_control_operation: Invalid picNumX 16 for operation type 1
WARN             h264decoder gsth264decoder.c:1926:gst_h264_decoder_handle_memory_management_opt:<d3d11h264dec1> memory management operation type 1 failed
WARN             h264decoder gsth264decoder.c:939:gst_h264_decoder_handle_frame_num_gap:<d3d11h264dec1> Invalid frame num 25, maybe frame drop
WARN             h264decoder gsth264picture.c:439:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 24
WARN             h264decoder gsth264picture.c:1046:gst_h264_dpb_perform_memory_management_control_operation: Invalid picNumX 24 for operation type 1
WARN             h264decoder gsth264decoder.c:1926:gst_h264_decoder_handle_memory_management_opt:<d3d11h264dec1> memory management operation type 1 failed
WARN             h264decoder gsth264decoder.c:939:gst_h264_decoder_handle_frame_num_gap:<d3d11h264dec1> Invalid frame num 18, maybe frame drop
WARN             h264decoder gsth264picture.c:439:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 17
WARN             h264decoder gsth264picture.c:1046:gst_h264_dpb_perform_memory_management_control_operation: Invalid picNumX 17 for operation type 1
WARN             h264decoder gsth264decoder.c:1926:gst_h264_decoder_handle_memory_management_opt:<d3d11h264dec1> memory management operation type 1 failed

Pipeline topology
topology.dot
you can see topology using Graphviz Online

How can i reduce drop frame ? is it a good way to change protocol to tcp only ?
Thanks

2

Packet lost can happen with UDP streaming. You should see these from the RTP stats. If you strictly need no loss, force TCP protocol, we have special scheme for this: rtspt://. Be before going there, check that your server is doing smooth (not bursty) streaming. You could check for enabling retransmission, or error correction if your server / camera supports that.

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