fps from rtsp doesn't seem to match camera setting on Trackmix LTE#333

**Describe the bug** When the camera fluent/clear stream is set to 15FPS I can read from the rtsp with ffmpeg at 1x speed, and the stream information looks correct: ``` Stream #0:0: Video: h264 (High), yuv420p(progressive), 896x512, q=2-31, 15 fps, 15 tbr, 90k tbn ``` If I re-configure the stream in the reolink app to be 12fps or 10fps then restart everything I see the same stream information: ``` Stream #0:0: Video: h264 (High), yuv420p(progressive), 896x512, q=2-31, 15 fps, 15 tbr, 90k tbn ``` and on 10fps the same ffmpeg command will not go above 0.6x~ processing speed. This leads to ffmpeg missing footage and the timestamps being incorrect. **To Reproduce** 1. Lower camera fps 2. Run ffmpeg: ``` ffmpeg -rtsp_transport tcp -re -timeout 10000000 -i rtsp://127.0.0.1:8554/trackmix-test-1/Sub -vcodec copy -an -f segment -hide_banner -segment_time 0:01:00 -strftime 1 -use_wallclock_as_timestamps 1 -reset_timestamps 1 -movflags frag_keyframe+empty_moov -segment_format mp4 test/%Y-%m-%d/%H.%M.%S.mp4 ``` **Expected behavior** Stream FPS changes to match camera setting. **Versions** NVR software: ffmpeg Neolink software: quantumentangledandy/neolink:latest docker image Reolink camera model and firmware: TrackMix LTE, v3.0.0.3179_24011700