[rtsp @ 0x7fba7b81e600] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 90000.00 (180000/2)
Input #0, rtsp, from 'rtsp://192.168.1.90/11':
  Metadata:
    title           : \11
  Duration: N/A, start: 0.066733, bitrate: N/A
    Stream #0.0: Video: h264 (Constrained Baseline), yuv420p, 352x240, 90k tbr, 90k tbn, 180k tbc
    Stream #0.1: Audio: pcm_alaw, 8000 Hz, 1 channels, s16, 64 kb/s