How to record an rtsp stream with high quality?

Question

linux

Hi all!
There are several cameras, broadcasting in RTSP is raised on them.
Initially, Win servers and Macroscope were used, but the solution turned out to be not flexible, expensive and not stable.
Therefore, we decided to switch to Linux, Debian is used
The entry tried to do using ffmpeg with the command:

/usr/bin/ffmpeg -i rtsp://172.16.30.11:554/user=admin_password=123456_channel=1_stream=0.sdp?real_stream -y -r 20 -s hd720 -b 4000k -vcodec libx264 -threads 8 -f segment -strftime 1 -segment_time 30 -segment_format mp4 /opt/video/cam1/%Y-%m-%d-%H-%M-%S.mp4

But the video is recorded with curves, frames are superimposed, floating and ripples appear.
I can’t understand what’s the matter, the quality was excellent on Macroscope.
ffmpeglog:

libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[h264 @ 0x1e62de0] RTP: missed 9 packets
[h264 @ 0x1e62de0] RTP: missed 7 packets
[h264 @ 0x1e62de0] concealing 4087 DC, 4087 AC, 4087 MV errors in I frame
Input #0, rtsp, from 'rtsp://172.16.30.11:554/user=admin_password=123456_channel=1_stream=0.sdp?real_stream':
  Metadata:
    title           : RTSP Session
  Duration: N/A, start: 0.320000, bitrate: N/A
    Stream #0:0: Video: h264 (Main), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 15 fps, 15 tbr, 90k tbn, 30 tbc
Please use -b:a or -b:v, -b is ambiguous
[libx264 @ 0x1fb0f00] using SAR=1/1
[libx264 @ 0x1fb0f00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x1fb0f00] profile High, level 3.1
[libx264 @ 0x1fb0f00] 264 - core 146 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=8 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=20 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=4000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, segment, to '/opt/video/cam1/%Y-%m-%d-%H-%M-%S.mp4':
  Metadata:
    title           : RTSP Session
    encoder         : Lavf56.25.101
    Stream #0:0: Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 4000 kb/s, 20 fps, 10240 tbn, 20 tbc
    Metadata:
      encoder         : Lavc56.26.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[h264 @ 0x275c8c0] concealing 4087 DC, 4087 AC, 4087 MV errors in I frame
Past duration 0.666664 too large
[NULL @ 0x1e62de0] RTP: missed 35 packets
[NULL @ 0x1e62de0] RTP: missed 1 packets00:00:00.00 bitrate=N/A dup=8 drop=5    
[NULL @ 0x1e62de0] RTP: missed 2 packets
[h264 @ 0x2598d60] concealing 1995 DC, 1995 AC, 1995 MV errors in I frame
frame=   77 fps= 20 q=27.0 size=N/A time=00:00:01.15 bitrate=N/A dup=47 drop=5  [NULL @ 0x1e62de0] RTP: missed 43 packets
[h264 @ 0x275c8c0] error while decoding MB 70 31, bytestream -9
[h264 @ 0x275c8c0] Cannot use next picture in error concealment
[h264 @ 0x275c8c0] concealing 4419 DC, 4419 AC, 4419 MV errors in P frame
frame=  110 fps= 23 q=22.0 size=N/A time=00:00:02.80 bitrate=N/A dup=69 drop=5  [NULL @ 0x1e62de0] RTP: missed 34 packets
[h264 @ 0x262f600] error while decoding MB 55 21, bytestream -14
[h264 @ 0x262f600] concealing 5634 DC, 5634 AC, 5634 MV errors in I frame
frame=  128 fps= 25 q=17.0 size=N/A time=00:00:03.70 bitrate=N/A dup=79 drop=5  frame=  133 fps= 23 q=22.0 size=N/A time=00:00:03.95 bitrate=N/A dup=80 drop=5  [NULL @ 0x1e62de0] RTP: missed 5 packets
[h264 @ 0x275c8c0] error while decoding MB 111 29, bytestream -7
[h264 @ 0x275c8c0] Cannot use next picture in error concealment
[h264 @ 0x275c8c0] concealing 4618 DC, 4618 AC, 4618 MV errors in P frame

Answer 1

1. Eocortex is available for Linux. If already purchased, why not use it.
2. You can search on the toaster. Here someone has already sawed his bike on ffmpeg or something like that.
3. Perhaps it will help to change the transport in ffmpeg to TCP.

Answer 2

There can be a lot of problems with recording from cameras.
The reasons will be both the camera itself and the quality of the channel between it and the server.
In theory, changing the transport should help, since packet loss seems to hint.
You can also decrease the segment time.
And yet, on long winter evenings, you can try Flussonic and its archive .
It works mainly under Debian/Ubuntu 64 bit.