$ ./scale.sh
ffmpeg version 3.0.2-1~xenial2 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
  configuration: --prefix=/usr --extra-version='1~xenial2' --libdir=/usr/lib/ffmpeg --shlibdir=/usr/lib/ffmpeg --disable-static --disable-debug --toolchain=hardened --enable-pthreads --enable-runtime-cpudetect --enable-gpl --enable-shared --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv --enable-libkvazaar --enable-libopenh264 --enable-nonfree --enable-libfdk-aac --enable-libfaac
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, rtsp, from 'rtsp://172.16.40.215:554':
  Metadata:
    title           : Media Presentation
  Duration: N/A, start: 0.496622, bitrate: N/A
    Stream #0:0: Video: h264 (Main), yuv420p(tv, bt709), 1920x1080, 12 fps, 50 tbr, 90k tbn, 24 tbc
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 3 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 3 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[h264 @ 0x22c51e0] concealing 7426 DC, 7426 AC, 7426 MV errors in I frame
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 1 packets
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 2 packets
[h264 @ 0x22c51e0] concealing 4614 DC, 4614 AC, 4614 MV errors in P frame
[rtsp @ 0x21c25a0] max delay reached. need to consume packet
[h264 @ 0x22c51e0] RTP: missed 97 packets
Input #1, rtsp, from 'rtsp://172.16.40.225:554':
  Metadata:
    title           : Media Presentation
  Duration: N/A, start: 0.516422, bitrate: N/A
    Stream #1:0: Video: h264 (Main), yuv420p(tv, bt709), 1920x1080, 12 fps, 12 tbr, 90k tbn, 24 tbc
Guessed Channel Layout for  Input Stream #2.0 : mono
Input #2, s16le, from '/dev/zero':
  Duration: N/A, bitrate: 705 kb/s
    Stream #2:0: Audio: pcm_s16le, 44100 Hz, 1 channels, s16, 705 kb/s
[Parsed_overlay_7 @ 0x22719a0] Media type mismatch between the 'Parsed_overlay_7' filter output pad 0 (video) and the 'Parsed_adelay_8' filter input pad 0 (audio)
[AVFilterGraph @ 0x21c2440] Cannot create the link overlay:0 -> adelay:0
Error initializing complex filters.
Invalid argument