[FFmpeg-trac] #9668(undetermined:new): genpts is not working with multiple RTSP inputs

[FFmpeg]

#9668: genpts is not working with multiple RTSP inputs
-------------------------------------+-------------------------------------
             Reporter:  Daniele      |                     Type:  defect
  Orlandi                            |
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 How to reproduce:
 {{{
 % ffmpeg -hide_banner -loglevel warning -nostats -nostdin -progress pipe:4
 -thread_queue_size 12
  -rtsp_transport tcp
  -fflags +genpts -i rtsp://videosrc
  -fflags +genpts -i rtsp://audiosrc
  -vcodec copy
  -acodec copy
  -f hls -hls_time 10 -hls_list_size 200
  -hls_segment_filename /var/www/hls/cam_ptz/1080/\%06d.ts
  -hls_flags omit_endlist+temp_file
  -hls_start_number_source epoch
  /var/www/hls/cam_ptz/1080/index.m3u8
 }}}

 Output:

 {{{
 [hls @ 0x561c2ed5a3c0] 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
 [rtsp @ 0x561c2ebdd100] Thread message queue blocking; consider raising
 the thread_queue_size option (current value: 12)
 [mpegts @ 0x561c2ee68100] 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
 [mpegts @ 0x561c2ee68100] first pts and dts value must be set
 av_interleaved_write_frame(): Invalid data found when processing input
 }}}

 If I understand correctly the issue comes from the RTSP sources not
 sending RTCP frames thus absolute timestamps cannot be generated. Would
 ffmpeg be able to generate PTS if the source had sent RTCP frames?

 Anyway, I understand that video and audio will not be synced, however it
 would be nice if ffmpeg could generate PTS anyway for the transport
 stream.

 It used to be somewhat working with ffmpeg 4.4.1 but now it does not work
 anymore with ffmpeg 5.0 and git master .
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9668>
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