[FFmpeg-trac] #7260(ffmpeg:new): Fail to get image dimension when RTSP falling back from UDP to TCP

[FFmpeg]

#7260: Fail to get image dimension when RTSP falling back from UDP to TCP
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             Reporter:  julien23  |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  ffmpeg    |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Summary of the bug:
 When I try to record video from a RTSP/H.265 camera that does only RTSP
 over TCP, it fails getting dimensions although it works fine if I force
 RTSP/TCP in the command line (-rtsp_transport tcp).

 How to reproduce:
 {{{
 % ./ffmpeg/ffmpeg -analyzeduration 10000000 -probesize 10000000 -i
 rtsp://admin:admin@192.168.51.175:80/0 -c copy -map 0:v -f segment
 -segment_time 600 "%03d.mp4"
 ffmpeg version N-91282-gc5e6c0b5f6 Copyright (c) 2000-2018 the FFmpeg
 developers
   built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
   configuration:
   libavutil      56. 18.102 / 56. 18.102
   libavcodec     58. 20.101 / 58. 20.101
   libavformat    58. 17.100 / 58. 17.100
   libavdevice    58.  4.101 / 58.  4.101
   libavfilter     7. 25.100 /  7. 25.100
   libswscale      5.  2.100 /  5.  2.100
   libswresample   3.  2.100 /  3.  2.100
 [rtsp @ 0x56423d973680] UDP timeout, retrying with TCP
 [rtsp @ 0x56423d973680] method PAUSE failed: 455 Method Not Valid In This
 State
 [hevc @ 0x56423d976940] missing picture in access unit
 [rtsp @ 0x56423d973680] Could not find codec parameters for stream 0
 (Video: hevc, none): unspecified size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Guessed Channel Layout for Input Stream #0.1 : mono
 Input #0, rtsp, from 'rtsp://admin:admin@192.168.51.175:80/0':
   Metadata:
     title           : h264.mp4
   Duration: N/A, bitrate: 64 kb/s
     Stream #0:0: Video: hevc, none, 90k tbr, 90k tbn, 90k tbc
     Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
 [segment @ 0x56423d9bdbc0] dimensions not set
 Could not write header for output file #0 (incorrect codec parameters ?):
 Invalid argument
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
     Last message repeated 1 times
 }}}
 {{{
 % ./ffmpeg/ffmpeg -rtsp_transport tcp -i
 rtsp://admin:admin@192.168.51.175:80/0 -c copy -map 0:v -f segment
 -segment_time 600 "%03d.mp4"
 ffmpeg version N-91282-gc5e6c0b5f6 Copyright (c) 2000-2018 the FFmpeg
 developers
   built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
   configuration:
   libavutil      56. 18.102 / 56. 18.102
   libavcodec     58. 20.101 / 58. 20.101
   libavformat    58. 17.100 / 58. 17.100
   libavdevice    58.  4.101 / 58.  4.101
   libavfilter     7. 25.100 /  7. 25.100
   libswscale      5.  2.100 /  5.  2.100
   libswresample   3.  2.100 /  3.  2.100
 Guessed Channel Layout for Input Stream #0.1 : mono
 Input #0, rtsp, from 'rtsp://admin:admin@192.168.51.175:80/0':
   Metadata:
     title           : h264.mp4
   Duration: N/A, start: 0.017000, bitrate: N/A
     Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x1080, 90k tbr, 90k
 tbn, 90k tbc
     Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
 [segment @ 0x55aa5202d540] Opening '000.mp4' for writing
 Output #0, segment, to '%03d.mp4':
   Metadata:
     title           : h264.mp4
     encoder         : Lavf58.17.100
     Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x1080, q=2-31, 90k
 tbr, 90k tbn, 90k tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 [segment @ 0x55aa5202d540] Timestamps are unset in a packet for stream 0.
 This is deprecated and will stop working in the future. Fix your code to
 set the timestamps properly
 [segment @ 0x55aa5202d540] Non-monotonous DTS in output stream 0:0;
 previous: 0, current: 0; changing to 1. This may result in incorrect
 timestamps in the output file.
 frame=  288 fps= 65 q=-1.0 Lsize=N/A time=00:00:09.53 bitrate=N/A
 speed=2.14x
 video:2519kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 Exiting normally, received signal 2.
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/7260>
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