[FFmpeg-trac] #7052(avformat:new): rtmp_write dead loop

[FFmpeg]

#7052: rtmp_write dead loop
-------------------------------------+-------------------------------------
             Reporter:  palich2000   |                     Type:  defect
               Status:  new          |                 Priority:  critical
            Component:  avformat     |                  Version:  git-
             Keywords:  rtmp_write   |  master
  dead loop                          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg hangs tightly in the function retry_transfer_wrapper when the rtmp
 stream is published. This can happen in 5 minutes or an hour after the
 start of the broadcast. The function RTMP_Write () returns 0, this is not
 an error, but it indicates that it could not transfer data, this causes
 the write cycle to hang.

 {{{
 ffmpeg -nostats -xerror -err_detect compliant -loglevel info -vsync
 passthrough -frame_drop_threshold 4 -headers Accept-Charset:
 ISO-8859-1,utf-8;q=0.7,*;q=0.7? User-Agent: Mozilla/5.0 (X11; Linux
 x86_64; rv:10.0) Gecko/20150101 Firefox/47.0 (Chrome)? Accept:
 text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8? Accept-
 Language: en-us,en;q=0.5? Youtubedl-no-compression: True? Accept-Encoding:
 gzip, deflate?  -fflags +genpts -i
 https://manifest.googlevideo.com/api/manifest/hls_playlist/id/r1L1J7E4oog.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4
 ---sn-bpb5oxu-
 3c26.googlevideo.com/ei/tQWZWqz7PNqFyAXCgLLoDA/playlist_type/DVR/gcr/ua/initcwndbps/133470/mm/32/mn
 /sn-bpb5oxu-
 3c26/ms/lv/mv/m/pl/24/dover/10/keepalive/yes/mt/1519977742/ip/195.137.167.181/ipbits/0/expire/1519999510/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pl/signature/828CDB2191F0FD1BCEB3D09693C9FD38A5019093.843CBBCAA1E3C32882E36DDD448A15AB1F595D53/key/dg_yt0/playlist/index.m3u8
 -init_hw_device qsv:hw -filter_complex
 yadif=0:1:0,eq=1.1:0:1.25,scale=640:360:1 -g 50 -aspect 16:9 -c:v h264_qsv
 -profile:v main -pix_fmt nv12 -tune zerolatency -level 4.1 -aspect 16:9
 -preset medium -b:v 800k -minrate:v 800k -maxrate:v 800k -bufsize:v 2400k
 -g 25 -strict experimental -strict experimental -acodec aac -ab 64k -ar
 44100 -af aresample=async=1:min_hard_comp=0.200000:first_pts=0 -f flv
 rtmp://localhost/vip/_1_

 ffmpeg version N-90182-g40102a2
 built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
 }}}
 {{{
 Thread 1 (Thread 0x7fa95f2a6840 (LWP 18390)):
 #0  0x000000000041f523 in decode_interrupt_cb (ctx=0x0) at
 fftools/ffmpeg.c:471
 #1  0x00007fa95e420ca7 in retry_transfer_wrapper
 (transfer_func=0x7fa95e477e30 <rtmp_write>, size_min=32768, size=32768,
 buf=0x2a87640 "\t", h=0x2904900) at libavformat/avio.c:374
 #2  ffurl_write (h=0x2904900, buf=0x2a87640 "\t", size=32768) at
 libavformat/avio.c:429
 #3  0x00007fa95e423b61 in writeout (len=32768, data=<optimized out>,
 s=0x2a8f780) at libavformat/aviobuf.c:163
 #4  flush_buffer (s=0x2a8f780) at libavformat/aviobuf.c:184
 #5  avio_write (s=s at entry=0x2a8f780, buf=0x3ee5550 "", size=32752) at
 libavformat/aviobuf.c:231
 #6  0x00007fa95e446f10 in flv_write_packet (s=0x29dde80,
 pkt=0x7ffe3a82fd80) at libavformat/flvenc.c:1031
 #7  0x00007fa95e4cf8f5 in write_packet (pkt=0x7ffe3a82fd80, s=0x29dde80)
 at libavformat/mux.c:747
 #8  av_interleaved_write_frame (s=s at entry=0x29dde80, pkt=0x0,
 pkt at entry=0x7ffe3a830250) at libavformat/mux.c:1231
 #9  0x0000000000421c82 in write_packet (pkt=pkt at entry=0x7ffe3a830250,
 ost=ost at entry=0x2901500, unqueue=unqueue at entry=0, of=0x1e5f940,
 of=0x1e5f940) at fftools/ffmpeg.c:807
 #10 0x0000000000424515 in output_packet (of=of at entry=0x1e5f940,
 pkt=pkt at entry=0x7ffe3a830250, ost=ost at entry=0x2901500, eof=0) at
 fftools/ffmpeg.c:878
 #11 0x0000000000425450 in do_video_out (of=of at entry=0x1e5f940,
 ost=ost at entry=0x2901500, next_picture=next_picture at entry=0x39e7bc0,
 sync_ipts=<optimized out>, sync_ipts at entry=72723.160011291504) at
 fftools/ffmpeg.c:1312
 #12 0x0000000000429226 in reap_filters (flush=flush at entry=0) at
 fftools/ffmpeg.c:1498
 #13 0x0000000000408fe9 in transcode_step () at fftools/ffmpeg.c:4592
 #14 transcode () at fftools/ffmpeg.c:4636
 #15 main (argc=<optimized out>, argv=<optimized out>) at
 fftools/ffmpeg.c:4839

 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/7052>
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