[FFmpeg-trac] #3721(avformat:new): crash on a valid rtp mpegts stream

[FFmpeg]

#3721: crash on a valid rtp mpegts stream
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             Reporter:  lavv17      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mpegts      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by lavv17):

 {{{write_section_data}}} assumes {{{s->priv_data}}} to be
 {{{MpegTSContext}}}. But {{{s->iformat}}} is still {{{ff_rtp_demuxer}}}
 and {{{s->priv_data}}} is allocated as an {{{RTSPState}}}.
 {{{
 (gdb) fr 1
 #1  0x00000000005589b4 in handle_packet (ts=ts at entry=0x7fd42c52bf80,
     packet=packet at entry=0x7fd42c528168 "GWx\031") at
 libavformat/mpegts.c:2095
 2095                    write_section_data(s, tss,
 (gdb) p s->iformat
 $4 = (struct AVInputFormat *) 0x1191060 <ff_rtp_demuxer>
 }}}

 BTW, {{{-f mpegts}}} prevents the crash, but the resulting file is not
 correct, so it is not the solution.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3721#comment:7>
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