[FFmpeg-trac] #8005(avformat:reopened): Assertion fails when reading rtp mpegts streaming using SDP file
FFmpeg
trac at avcodec.org
Fri Jan 24 14:13:05 EET 2020
#8005: Assertion fails when reading rtp mpegts streaming using SDP file
-------------------------------------+-------------------------------------
Reporter: maf | Owner:
Type: defect | Status: reopened
Priority: important | Component: avformat
Version: git-master | Resolution:
Keywords: sdp mpegts | Blocked By:
crash abort |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Changes (by maf):
* status: closed => reopened
* resolution: needs_more_info =>
Comment:
Reproduced with latest version e931119...
{{{
ffplay rtp_test.sdp -protocol_whitelist "file,rtp,udp"
ffplay version git-2020-01-24-e931119 Copyright (c) 2003-2020 the FFmpeg
developers
built with gcc 9.2.1 (GCC) 20200122
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d
--enable-libb
luray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb
--enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
libshine --e
nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame
--enable
-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 -
-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
--enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-
libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-
ffnvcode
c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-
dxva2 -
-enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 38.100 / 56. 38.100
libavcodec 58. 66.100 / 58. 66.100
libavformat 58. 35.104 / 58. 35.104
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 71.100 / 7. 71.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[udp @ 00000000005cc140] 'circular_buffer_size' option was set but it is
not supported on this build (pthread support is required)
[udp @ 00000000005cc240] 'circular_buffer_size' option was set but it is
not supported on this build (pthread support is required)
[udp @ 00000000005cc340] 'circular_buffer_size' option was set but it is
not supported on this build (pthread support is required)
[udp @ 00000000005cc400] 'circular_buffer_size' option was set but it is
not supported on this build (pthread support is required)
Assertion pos >= 188 failed at src/libavformat/mpegts.c:2721f=0/0
This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.
nan : 0.000 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0
}}}
The SDP file might look like this.
{{{
v=0
c=IN IP4 192.168.1.150
m=video 20000 RTP/AVP 33
a=rtpmap:33 MP2T/90000
a=control:mpegts-transport
}}}
See the original post. Function handle_packet() in avformat/mpegts.c is
calling avio_tell() on ts->stream->pb. But that is not the TS stream! That
is the SDP file. The stream is not available to handle_packet at all as it
is called from avpriv_mpegts_parse_packet where the packet comes as an
argument.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8005#comment:4>
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