Issue with Multicast Streaming in v4l2rtspserver

Hi, We are attempting to enable multicast streaming using v4l2rtspserver. Sender Configuration: Command executed on the device: /tmp/v4l2rtspserver -m multicast -M 239.255.42.42:5004 /dev/video3 -fHEVC Log Output: [NOTICE] (main.cpp:254) Version: 0.3.11-21-gb0d24eb-dirty live555 version:2024.10.31 VIDIOC_REQBUFS: Inappropriate ioctl for device VIDIOC_STREAMOFF: Inappropriate ioctl for device VIDIOC_REQBUFS: Inappropriate ioctl for device [NOTICE] (V4l2RTSPServer.cpp:37) Create V4L2 Source...multicast [NOTICE] (V4l2RTSPServer.h:142) RTP address 232.221.213.121:20000 [NOTICE] (V4l2RTSPServer.h:143) RTCP address 232.221.213.121:20001 ... [NOTICE] (V4l2RTSPServer.h:275) Play this stream using the URL "rtsp://192.168.1.10:8554/video3_multicast" Receiver Configuration: Command executed on the receiving side: vlc -vvv rtsp://192.168.1.10:8554/video3_multicast Log Output: [hevc @ 0x73ebb0074340] Decoding PPS [000073ebb004cc70] avcodec decoder debug: codec (hevc) started [000073ebb004cc70] avcodec decoder debug: using frame thread mode with 9 threads [000073ebb004cc70] main decoder debug: using video decoder module "avcodec" ... [000073ebb4000c40] main input debug: `rtsp://192.168.1.10:8554/video3_multicast' successfully opened Issue: The stream opens successfully in VLC, but only a black screen is displayed. Unicast streaming works without any issues. Troubleshooting Attempts: Verified the video device is functional. Ensured multicast routing is enabled and IGMP snooping is properly configured. Checked firewall settings to allow multicast traffic. Confirmed network supports multicast.