Opened 18 months ago

Last modified 18 months ago

#5604 new defect

read rtmp stream occur Packet mismatch

Reported by: heibaijun Owned by:
Priority: normal Component: undetermined
Version: unspecified Keywords: rtmp flv
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no



built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --disable-ffserver --disable-ffplay --enable-shared --disable-static --enable-runtime-cpudetect --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-bzlib --enable-libfreetype --disable-debug --enable-libfaac --enable-libx264 --enable-libfdk-aac --enable-nonfree --disable-stripping --enable-pic --extra-libs=-lstdc++
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100


CentOS release 6.6 (Final) 2.6.32-504.el6.x86_64


ffmpeg -re -i rtmp:// -c:v copy -c:a copy -f flv rtmp://


[flv @ 0x34db420] type:8, size:194, last:-1, dts:800 pos:5786
[flv @ 0x34db420] 1 AF 0
old_flv_size=0 type=8 size=195 ts=832 total=206
[flv @ 0x34db420] type:8, size:195, last:-1, dts:832 pos:5995
[flv @ 0x34db420] 1 AF 0
old_flv_size=0 type=8 size=204 ts=864 total=215 ---------------------> function append_flv_data print
[flv @ 0x34db420] type:8, size:204, last:-1, dts:864 pos:6205
[flv @ 0x34db420] 1 AF 0
[rtmp @ 0x34dbce0] ff_rtmp_packet_read EIO
[AVIOContext @ 0x34dd280] read avio failed ret = 0 start=0x34e67ab end=0x34e67ab

Last message repeated 7 times ---------------------> function avio_r8 return 0 print

[flv @ 0x34db420] type:0, size:0, last:-1, dts:0 pos:6416
old_flv_size=0 type=9 size=43 ts=854 total=54 ---------------------> function avio_feof->fill_buffer->append_flv_data
[flv @ 0x34db420] size =0 FFERROR_REDO ---------------------> size = 0 goto leave
[flv @ 0x34db420] Packet mismatch 721421142 11
old_flv_size=0 type=9 size=39125 ts=885 total=39136
old_flv_size=0 type=8 size=192 ts=896 total=203
old_flv_size=0 type=8 size=203 ts=928 total=214 -------------------->function append_flv_data print right
[flv @ 0x34db420] type:0, size:51968, last:721421142, dts:237568 pos:45830 ------>size is invalid
[flv @ 0x34db420] Skipping flv packet: type 0, size 51968, flags 0.
old_flv_size=0 type=9 size=2019 ts=935 total=2030
old_flv_size=0 type=8 size=195 ts=960 total=206
old_flv_size=0 type=9 size=3186 ts=989 total=3197
old_flv_size=0 type=8 size=196 ts=992 total=207


In function flv_read_packet, before Packet mismatch happen, rtmp read return EIO, avio_r8 return 0, so var type, size and dts equal zero,
then function goto tag leave, at this time avio_rb32 read next packet, var last equal first four byte
after Packet mismatch happen, rtmp read packet is right
so rtmp level is right and flv level is wrong
avio_r8 and avio_rb32 can not return failed state
because flv packet is wrong, can not read right size

Change History (1)

comment:1 Changed 18 months ago by cehoyos

  • Keywords rtmp flv added; Packet mismatch removed
  • Priority changed from critical to normal

Please explain how the issue can be reproduced and provide the command line you tested together with the complete, uncut console output to make this a valid ticket.

Note: See TracTickets for help on using tickets.