SRT No room to store incoming packet

[metaswirl]

Description

I have 2 instances of Liquidsoap running, one at home which is a SRT caller, one on a remote VPS which is a SRT listener. The stream works flawlessy for roughly about 12 hours, until the remote VPS SRT listener crashes and the log is filled with:

2024/09/19 10:08:08 [srt:4] 10:08:08.076563/SRT:RcvQ:w1!W:SRT.qr: @466951504: No room to store incoming packet seqno 1089222595, insert offset 16427. iFirstUnackSeqNo=1089214359 m_iStartSeqNo=1089206168 m_iStartPos=6182 m_iMaxPosOff=8191. Space avail 0/8192 pkts. (TSBPD ready in -112483ms, timespan 56120 ms). GETTIME_MONOTONIC drift 0 ms.

Steps to reproduce

Home server (caller)

enc = %ffmpeg(format="s16le",%audio(codec="pcm_s16le", ac=2, ar=48000))

output.srt(host="X.X.X.X", port=9010, 
           passphrase="********", 
           enforced_encryption=true, on_connect=srt_connect, id="srt", enc, playlist_safe)

VPS (listener)

raw_srt_input = input.srt(
    content_type="application/ffmpeg; format=s16le, channels=2, sample_rate=44100",
    passphrase="********", enforced_encryption=true, bind_address="X.X.X.X", port=9010)

radio = blank.strip(stereo(raw_srt_input))

Expected behavior

Possibly the application does not read the packets fast enough and I would need to increase the receive buffer on the listener? re: Haivision/srt#409

Is there a way to add values to rcvbuf on input.srt ?

Liquidsoap version

Liquidsoap 2.2.5+dev
Copyright (c) 2003-2024 Savonet team
Liquidsoap is open-source software, released under GNU General Public License.
See <http://liquidsoap.info> for more information.

Liquidsoap build config

* Liquidsoap version  : 2.2.5+dev

 * Compilation options
   - Release build       : false
   - Git SHA             : (none)
   - OCaml version       : 5.2.0
   - OS type             : Unix
   - Libs versions       : angstrom=0.16.0 asn1-combinators=0.2.6 astring=0.8.5 base64=3.5.1 bigarray-compat=1.1.0 bigstringaf=0.10.0 bos=0.2.1 bytes=[distributed with OCaml 4.02 or above] ca-certs=v0.2.3 camlp-streams camomile.lib=2.0 cry=1.0.3 cstruct=6.2.0 ctypes=0.23.0 ctypes-foreign=0.23.0 ctypes.stubs=0.23.0 curl=0.9.2 domain-name=0.4.0 dtools=0.4.5 dune-build-info=3.16.0 dune-private-libs.dune-section=3.16.0 dune-site=3.16.0 dune-site.private=3.16.0 duppy=0.9.4 eqaf=0.9 eqaf.bigstring=0.9 eqaf.cstruct=0.9 ffmpeg-av=1.1.11 ffmpeg-avcodec=1.1.11 ffmpeg-avdevice=1.1.11 ffmpeg-avfilter=1.1.11 ffmpeg-avutil=1.1.11 ffmpeg-swresample=1.1.11 ffmpeg-swscale=1.1.11 fileutils=0.6.4 fmt=0.9.0 fpath=0.7.3 gen=1.1 gmap=0.3.0 hkdf=1.0.4 integers ipaddr=5.6.0 ladspa=0.2.2 liquidsoap-lang=2.2.5 liquidsoap-lang.console=2.2.5 liquidsoap_builtins liquidsoap_core liquidsoap_ffmpeg liquidsoap_ladspa liquidsoap_optionals liquidsoap_oss liquidsoap_runtime liquidsoap_srt liquidsoap_stereotool liquidsoap_taglib liquidsoap_tls logs=0.7.0 macaddr=5.6.0 magic-mime=1.3.1 menhirLib=20240715 metadata=0.3.0 mirage-crypto=0.11.3 mirage-crypto-ec=0.11.3 mirage-crypto-pk=0.11.3 mirage-crypto-rng=0.11.3 mirage-crypto-rng.unix=0.11.3 mm=0.8.5 mm.audio=0.8.5 mm.base=0.8.5 mm.image=0.8.5 mm.midi=0.8.5 mm.video=0.8.5 pbkdf pcre=7.5.0 posix-base=2.0.2 posix-socket=2.0.2 posix-socket.constants=2.0.2 posix-socket.stubs=2.0.2 posix-socket.types=2.0.2 ppx_string.runtime=v0.17.0 ptime=1.1.0 ptime.clock.os=1.1.0 re=1.12.0 rresult=0.7.0 sedlex=3.2 seq=[distributed with OCaml 4.07 or above] sexplib0=v0.17.0 srt=0.3.0 srt.constants=0.3.0 srt.stubs=0.3.0 srt.stubs.locked=0.3.0 srt.types=0.3.0 stdlib-shims=0.3.0 stereotool str=5.2.0 stringext=1.6.0 taglib=0.3.10 threads=5.2.0 tls=0.17.3 unix=5.2.0 uri=4.4.0 x509=0.16.5 zarith=1.14
   - architecture        : amd64
   - host                : x86_64-pc-linux-gnu
   - target              : x86_64-pc-linux-gnu
   - system              : linux
   - ocamlopt_cflags     : -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC -pthread
   - native_c_compiler   : gcc -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC -pthread -D_FILE_OFFSET_BITS=64
   - native_c_libraries  : -lm -ldl -lpthread

 * Configured paths
   - mode              : default
   - standard library  : (set by dune-site)
   - scripted binaries : (set by dune-site)
   - rundir            : (set by dune-site)
   - logdir            : (set by dune-site)
   - camomile files    : (set by dune-site)

 * Supported input formats
   - MP3               : no (requires mad)
   - AAC               : no (requires faad)
   - Ffmpeg            : yes
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)

 * Supported output formats
   - FDK-AAC           : no (requires fdkaac)
   - Ffmpeg            : yes
   - MP3               : no (requires lame)
   - MP3 (fixed-point) : no (requires shine)
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)

 * Tags
   - Taglib (ID3 tags) : yes
   - Vorbis            : no (requires vorbis)

 * Input / output
   - ALSA              : no (requires alsa)
   - AO                : no (requires ao)
   - FFmpeg            : yes
   - GStreamer         : no (requires gstreamer)
   - JACK              : no (requires bjack)
   - OSS               : yes
   - Portaudio         : no (requires portaudio)
   - Pulseaudio        : no (requires pulseaudio)
   - SRT               : yes

 * Audio manipulation
   - FFmpeg            : yes
   - LADSPA            : yes
   - Lilv              : no (requires lilv)
   - Samplerate        : no (requires samplerate)
   - SoundTouch        : no (requires soundtouch)
   - StereoTool        : yes

 * Video manipulation
   - camlimages        : no (requires camlimages)
   - FFmpeg            : yes
   - frei0r            : no (requires frei0r)
   - ImageLib          : no (requires imagelib)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * MIDI manipulation
   - DSSI              : no (requires dssi)

 * Visualization
   - GD                : no (requires gd)
   - Graphics          : no (requires graphics)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * Additional libraries
   - FFmpeg filters    : yes
   - FFmpeg devices    : yes
   - inotify           : no (requires inotify)
   - irc               : no (requires irc-client-unix)
   - jemalloc          : no (requires jemalloc)
   - lastfm            : no (requires lastfm)
   - lo                : no (requires lo)
   - memtrace          : no (requires memtrace)
   - mem_usage         : no (requires mem_usage)
   - osc               : no (requires osc-unix)
   - ssl               : no (requires ssl)
   - tls               : yes
   - posix-time2       : no (requires posix)
   - windows service   : no (requires winsvc)
   - YAML support      : no (requires yaml)
   - XML playlists     : no (requires xmlplaylist)

 * Monitoring
   - Prometheus        : no (requires prometheus)

Installation method

From OPAM

Additional Info

No response

[metaswirl]

I believe I have solved this issue, might have something to do with using RSAS instead of Icecast.

I changed the following settings on output.icecast:

send_icy_metadata=false

mksafe(buffer(stream)

The stream has been running for 3 days without any issues! :)