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20 hours ago •
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SRT：推流切HLS出现错误
vmix推流到SRS轻量服务器，错误日志如下：
docker logs -f srs-server|grep t33g4163
03:33:29.679184/srs*E:SRT.d: SND-DROPPED 4 packets - lost delaying for 1022ms
03:35:23.059938/SRT:RcvQ:worker*E:SRT.c: IPE: ACK node overwritten when acknowledging 1162 (ack extracted: 1004308388)
03:36:52.965435/SRT:RcvQ:worker*E:SRT.c: IPE: ACK node overwritten when acknowledging 5908 (ack extracted: 1004325252)
[2022-03-04 03:37:48.565][Trace][1][t33g4163] RTMP client ip=127.0.0.1:48220, fd=17
[2022-03-04 03:37:48.568][Trace][1][t33g4163] complex handshake success
[2022-03-04 03:37:48.568][Trace][1][t33g4163] connect app, tcUrl=rtmp://127.0.0.1/live, pageUrl=, swfUrl=, schema=rtmp, vhost=127.0.0.1, port=1935, app=live, args=(obj)
[2022-03-04 03:37:48.569][Trace][1][t33g4163] edge-srs ip=172.17.0.4, version=4.0.241, pid=1, id=0
[2022-03-04 03:37:48.569][Trace][1][t33g4163] protocol in.buffer=0, in.ack=0, out.ack=0, in.chunk=128, out.chunk=128
[2022-03-04 03:37:48.570][Trace][1][t33g4163] client identified, type=flash-publish, vhost=127.0.0.1, app=live, stream=livestream, param=?secret=d6d2be37&vhost=127.0.0.1, duration=0ms
[2022-03-04 03:37:48.578][Trace][1][t33g4163] http: on_connect ok, client_id=t33g4163, url=http://mgmt.srs.local:2022/terraform/v1/hooks/srs/verify, request={"server_id":"vid-1odw09d","action":"on_connect","client_id":"t33g4163","ip":"127.0.0.1","vhost":"__defaultVhost__","app":"live","stream":"livestream","param":"?secret=d6d2be37&vhost=127.0.0.1","tcUrl":"rtmp://127.0.0.1/live","pageUrl":""}, response={"code":0}
[2022-03-04 03:37:48.578][Trace][1][t33g4163] connected stream, tcUrl=rtmp://127.0.0.1/live, pageUrl=, swfUrl=, schema=rtmp, vhost=__defaultVhost__, port=1935, app=live, stream=livestream, param=?secret=d6d2be37&vhost=127.0.0.1, args=(obj)
[2022-03-04 03:37:48.578][Trace][1][t33g4163] source url=/live/livestream, ip=127.0.0.1, cache=1, is_edge=0, source_id=/3890cc79
[2022-03-04 03:37:48.590][Trace][1][t33g4163] http: on_publish ok, client_id=t33g4163, url=http://mgmt.srs.local:2022/terraform/v1/hooks/srs/verify, request={"server_id":"vid-1odw09d","action":"on_publish","client_id":"t33g4163","ip":"127.0.0.1","vhost":"__defaultVhost__","app":"live","tcUrl":"rtmp://127.0.0.1/live","stream":"livestream","param":"?secret=d6d2be37&vhost=127.0.0.1"}, response={"code":0}
[2022-03-04 03:37:48.592][Trace][1][t33g4163] RTC bridge from RTMP, rtmp2rtc=1, keep_bframe=0, merge_nalus=0
[2022-03-04 03:37:48.600][Trace][1][t33g4163] hls: win=60000ms, frag=10000ms, prefix=, path=./objs/nginx/html, m3u8=[app]/[stream].m3u8, ts=[app]/[stream]-[seq].ts, aof=2.00, floor=0, clean=1, waitk=1, dispose=0ms, dts_directly=1
[2022-03-04 03:37:48.600][Trace][1][t33g4163] ignore disabled exec for vhost=__defaultVhost__
[2022-03-04 03:37:48.601][Trace][1][t33g4163] start publish mr=0/350, p1stpt=20000, pnt=5000, tcp_nodelay=0
[2022-03-04 03:37:48.606][Warn][1][t33g4163][11] aac ignore type=1 for no sequence header
[2022-03-04 03:37:48.607][Trace][1][t33g4163] Drop ts segment, sequence_no=14, uri=livestream-14.ts, duration=0ms
[2022-03-04 03:37:48.617][Trace][1][t33g4163] cleanup when unpublish
[2022-03-04 03:37:48.617][Trace][1][t33g4163] cleanup when unpublish, created=1, deliver=1
[2022-03-04 03:37:48.625][Trace][1][t33g4163] http: on_unpublish ok, client_id=t33g4163, url=http://mgmt.srs.local:2022/terraform/v1/hooks/srs/verify, request={"server_id":"vid-1odw09d","action":"on_unpublish","client_id":"t33g4163","ip":"127.0.0.1","vhost":"__defaultVhost__","app":"live","stream":"livestream","param":"?secret=d6d2be37&vhost=127.0.0.1"}, response={"code":0}
[2022-03-04 03:37:48.635][Trace][1][t33g4163] http: on_close ok, client_id=t33g4163, url=http://mgmt.srs.local:2022/terraform/v1/hooks/srs/verify, request={"server_id":"vid-1odw09d","action":"on_close","client_id":"t33g4163","ip":"127.0.0.1","vhost":"__defaultVhost__","app":"live","send_bytes":3865,"recv_bytes":3702}, response={"code":0}
[2022-03-04 03:37:48.635][Trace][1][t33g4163] TCP: before dispose resource(RtmpConn)(0x1ece1b0), conns=2, zombies=0, ign=0, inz=0, ind=0
[2022-03-04 03:37:48.635][Error][1][t33g4163][11] serve error code=5011 : service cycle : rtmp: stream service : rtmp: receive thread : handle publish message : rtmp: consume message : rtmp: consume audio : bridger consume audio : aac append header : adts
thread [1][t33g4163]: do_cycle() [src/app/srs_app_rtmp_conn.cpp:217][errno=11]
thread [1][t33g4163]: service_cycle() [src/app/srs_app_rtmp_conn.cpp:414][errno=11]
thread [1][t33g4163]: do_publishing() [src/app/srs_app_rtmp_conn.cpp:910][errno=11]
thread [1][t33g4163]: consume() [src/app/srs_app_recv_thread.cpp:380][errno=11]
thread [1][t33g4163]: handle_publish_message() [src/app/srs_app_rtmp_conn.cpp:1037][errno=11]
thread [1][t33g4163]: process_publish_message() [src/app/srs_app_rtmp_conn.cpp:1058][errno=11]
thread [1][t33g4163]: on_audio_imp() [src/app/srs_app_source.cpp:2223][errno=11]
thread [1][t33g4163]: on_audio() [src/app/srs_app_rtc_source.cpp:843][errno=11]
thread [1][t33g4163]: aac_raw_append_adts_header() [src/app/srs_app_rtc_source.cpp:85][errno=11](Resource temporarily unavailable)
03:37:52.910634/SRT:RcvQ:worker*E:SRT.c: IPE: ACK node overwritten when acknowledging 9105 (ack extracted: 1004336704)
[2022-03-04 03:37:48.635][Trace][1][t33g4163] TCP: disposing #0 resource(RtmpConn)(0x1ece1b0), conns=2, disposing=1, zombies=0
[2022-03-04 03:37:48.662][Trace][1][r02gu55i] source url=/live/livestream, ip=127.0.0.1, cache=1, is_edge=0, source_id=/t33g4163
03:38:22.886780/SRT:RcvQ:worker*E:SRT.c: IPE: ACK node overwritten when acknowledging 10711 (ack extracted: 1004342323)
看起来是HLS切片失败，导致推流失败了。
After checking, this is an RTMP AAC stream data. It needs to have a header called "aac_sequence_header". However, it encountered raw AAC data, so the following output will be displayed.
[2022-03-04 03:37:48.606][Warn][1][t33g4163][11] aac ignore type=1 for no sequence header
When calling the function "aac_raw_append_adts_header" later on, it was found that the "nb_samples" of the raw AAC data is not 1, which resulted in an error being returned. So the root cause is that the AAC stream coming from RTMP did not send the header first. It is currently unclear from the logs why the SRT2RTMP did not include the header. It is highly likely that SRT lost packets, leading to the incorrect parsing of AAC metadata.
TRANS_BY_GPT3
