ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.3.0 (Alpine 8.3.0)
  configuration: --prefix=/usr --enable-avresample --enable-avfilter --enable-gnutls --enable-gpl --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libx264 --enable-libx265 --enable-libtheora --enable-libv4l2 --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-libxcb --disable-stripping --disable-static --disable-librtmp --enable-vaapi --enable-vdpau --enable-libopus --disable-asm --disable-debug
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
[h264 @ 0x753c7690] error while decoding MB 1 27, bytestream -22
[h264 @ 0x753c7690] concealing 1488 DC, 1488 AC, 1488 MV errors in I frame
[rtsp @ 0x753e5930] decoding for stream 0 failed
Input #0, rtsp, from 'rtsp://REDACTED:8554/unicast':
  Metadata:
    title           : LIVE555 Streaming Media v2017.10.28
    comment         : LIVE555 Streaming Media v2017.10.28
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1280x720, 10 fps, 10 tbr, 90k tbn, 20 tbc
Could not write header for output file #0 (incorrect codec parameters ?): Immediate exit requested
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
    Last message repeated 1 times