[Live-devel] Failed to Setup RTSP Session

Thu Dec 22 00:30:20 PST 2022

Hi

I am using the RTSP server on an IP camera to render my camera streams. I
am testing using vlc and ffplay client to connect to the RTSP server
running on my camera.

I have observed that for Low FPS and GOP the RTSP session fails.
*Ex:* FPS is set as 4 and GOP is set as 120 then many times I observe below
errors in verbose prints enable for vlc -
*live555 demux error: Failed to connect with
rtsp://192.168.1.157:554/main_stream <http://192.168.1.157:554/main_stream>*
*satip stream error: Failed to setup RTSP session*

On analysing VLC logs and wireshark packets it is observed that RTSP server
do not send any response for DESCRIBE.

I have verified by dumping frames into a file and with
testOnDemandRTSPServer
able to stream the file with such configurations. Also using the same RTSP
server code in different SOC also works.

Can anyone suggest where to debug this?
Attaching the complete logs for reference.

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ap at 1938--VISN--AHM:~/Downloads$ vlc -vv rtsp://192.168.1.157/main_stream
VLC media player 3.0.8 Vetinari (revision 3.0.8-0-gf350b6b5a7)
[000055bea8aa6570] main libvlc debug: VLC media player - 3.0.8 Vetinari
[000055bea8aa6570] main libvlc debug: Copyright © 1996-2019 the VideoLAN team
[000055bea8aa6570] main libvlc debug: revision 3.0.8-0-gf350b6b5a7
[000055bea8aa6570] main libvlc debug: configured with ./configure  '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--runstatedir=/run' '--disable-maintainer-mode' '--disable-dependency-tracking' '--config-cache' '--disable-update-check' '--enable-fast-install' '--docdir=/usr/share/doc/vlc' '--with-binary-version=3.0.8-0ubuntu18.04.1' '--enable-a52' '--enable-aa' '--enable-aribsub' '--enable-bluray' '--enable-avahi' '--enable-caca' '--enable-chromaprint' '--enable-chromecast' '--enable-dbus' '--enable-dca' '--enable-dvbpsi' '--enable-dvdnav' '--enable-faad' '--enable-flac' '--enable-fluidsynth' '--enable-freetype' '--enable-fribidi' '--enable-gles2' '--enable-gnutls' '--enable-harfbuzz' '--enable-jack' '--enable-kate' '--enable-libass' '--enable-libmpeg2' '--enable-libxml2' '--enable-lirc' '--enable-live555' '--enable-mad' '--enable-matroska' '--enable-mod' '--enable-mpc' '--enable-mpg123' '--enable-mtp' '--enable-ncurses' '--enable-notify' '--enable-ogg' '--enable-opus' '--enable-pulse' '--enable-qt' '--enable-realrtsp' '--enable-samplerate' '--enable-sdl-image' '--enable-sftp' '--enable-shine' '--enable-shout' '--enable-skins2' '--enable-sndio' '--enable-soxr' '--enable-speex' '--enable-svg' '--enable-svgdec' '--enable-taglib' '--enable-theora' '--enable-twolame' '--enable-upnp' '--enable-vdpau' '--enable-vnc' '--enable-vorbis' '--enable-x264' '--enable-x265' '--enable-zvbi' '--with-kde-solid=/usr/share/solid/actions/' '--disable-d3d11va' '--disable-decklink' '--disable-directx' '--disable-dsm' '--disable-dxva2' '--disable-fdkaac' '--disable-fluidlite' '--disable-freerdp' '--disable-goom' '--disable-gst-decode' '--disable-libtar' '--disable-macosx' '--disable-macosx-avfoundation' '--disable-macosx-qtkit' '--disable-mfx' '--disable-opencv' '--disable-projectm' '--disable-schroedinger' '--disable-sparkle' '--disable-srt' '--disable-telx' '--disable-vpx' '--disable-vsxu' '--disable-wasapi' '--enable-alsa' '--enable-dc1394' '--enable-dv1394' '--enable-libplacebo' '--enable-linsys' '--enable-nfs' '--enable-omxil' '--enable-udev' '--enable-v4l2' '--enable-wayland' '--enable-libva' '--enable-vcd' '--enable-smbclient' '--disable-oss' '--enable-crystalhd' '--enable-mmx' '--enable-sse' '--disable-neon' '--disable-altivec' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fdebug-prefix-map=/build/vlc-3gw7Y1/vlc-3.0.8=. -fstack-protector-strong -Wformat -Werror=format-security ' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fdebug-prefix-map=/build/vlc-3gw7Y1/vlc-3.0.8=. -fstack-protector-strong -Wformat -Werror=format-security ' 'OBJCFLAGS=-g -O2 -fdebug-prefix-map=/build/vlc-3gw7Y1/vlc-3.0.8=. -fstack-protector-strong -Wformat -Werror=format-security'
[000055bea8aa6570] main libvlc debug: searching plug-in modules
[000055bea8aa6570] main libvlc debug: loading plugins cache file /usr/lib/x86_64-linux-gnu/vlc/plugins/plugins.dat
[000055bea8aa6570] main libvlc debug: recursively browsing `/usr/lib/x86_64-linux-gnu/vlc/plugins'
[000055bea8aa6570] main libvlc debug: plug-ins loaded: 525 modules
[000055bea8aa6570] main libvlc debug: opening config file (/home/ap/.config/vlc/vlcrc)
[000055bea8aa68c0] main logger debug: looking for logger module matching "any": 4 candidates
[000055bea8aa68c0] main logger debug: using logger module "console"
[000055bea8aa6570] main libvlc debug: translation test: code is "C"
[000055bea8b3ebf0] main keystore debug: looking for keystore module matching "memory": 4 candidates
[000055bea8b3ebf0] main keystore debug: using keystore module "memory"
[000055bea8aa6570] main libvlc debug: CPU has capabilities MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 FPU 
[000055bea8b443c0] main input debug: Creating an input for 'Media Library'
[000055bea8b443c0] main input debug: Input is a meta file: disabling unneeded options
[000055bea8b443c0] main input debug: using timeshift granularity of 50 MiB
[000055bea8b443c0] main input debug: using default timeshift path
[000055bea8b443c0] main input debug: `file/directory:///home/ap/.local/share/vlc/ml.xspf' gives access `file' demux `directory' path `/home/ap/.local/share/vlc/ml.xspf'
[000055bea8b3ef90] main input source debug: creating demux: access='file' demux='directory' location='/home/ap/.local/share/vlc/ml.xspf' file='/home/ap/.local/share/vlc/ml.xspf'
[000055bea8b3f540] main demux debug: looking for access_demux module matching "file": 20 candidates
[000055bea8b3f540] main demux debug: no access_demux modules matched
[000055bea8b62fc0] main stream debug: creating access: file:///home/ap/.local/share/vlc/ml.xspf
[000055bea8b62fc0] main stream debug:  (path: /home/ap/.local/share/vlc/ml.xspf)
[000055bea8b62fc0] main stream debug: looking for access module matching "file": 28 candidates
[000055bea8b62fc0] main stream debug: using access module "filesystem"
[000055bea8b63b30] main stream debug: looking for stream_filter module matching "prefetch,cache_read": 26 candidates
[000055bea8b63b30] cache_read stream debug: Using stream method for AStream*
[000055bea8b63b30] cache_read stream debug: starting pre-buffering
[000055bea8b63b30] cache_read stream debug: received first data after 0 ms
[000055bea8b63b30] cache_read stream debug: pre-buffering done 296 bytes in 0s - 7606 KiB/s
[000055bea8b63b30] main stream debug: using stream_filter module "cache_read"
[000055bea8b650d0] main stream debug: looking for stream_filter module matching "any": 26 candidates
[000055bea8b650d0] playlist stream debug: using XSPF playlist reader
[000055bea8b650d0] main stream debug: using stream_filter module "playlist"
[000055bea8b650d0] main stream debug: stream filter added to 0x55bea8b63b30
[000055bea8b685c0] main stream debug: looking for stream_filter module matching "any": 26 candidates
[000055bea8b685c0] main stream debug: no stream_filter modules matched
[000055bea8b3f370] main stream_directory debug: looking for stream_directory module matching "any": 1 candidates
[000055bea8b3f370] main stream_directory debug: no stream_directory modules matched
[000055bea8b3ef90] main input source debug: attachment of directory-extractor failed for file:///home/ap/.local/share/vlc/ml.xspf
[000055bea8b685c0] main stream debug: looking for stream_filter module matching "record": 26 candidates
[000055bea8b685c0] main stream debug: using stream_filter module "record"
[000055bea8b3ef90] main input source debug: creating demux: access='file' demux='directory' location='/home/ap/.local/share/vlc/ml.xspf' file='/home/ap/.local/share/vlc/ml.xspf'
[000055bea8b3f540] main demux debug: looking for demux module matching "directory": 55 candidates
[000055bea8b3f540] main demux debug: using demux module "directory"
[000055bea8b6d130] main demux meta debug: looking for meta reader module matching "any": 2 candidates
[000055bea8b6d130] lua demux meta debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/meta/reader
[000055bea8b6d130] lua demux meta debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/meta/reader
[000055bea8b6d130] lua demux meta debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/reader/filename.luac
[000055bea8b6d130] lua demux meta debug: Trying Lua scripts in /usr/share/vlc/lua/meta/reader
[000055bea8b6d130] main demux meta debug: no meta reader modules matched
[000055bea8b443c0] main input debug: `file/directory:///home/ap/.local/share/vlc/ml.xspf' successfully opened
[000055bea8b728e0] main xml reader debug: looking for xml reader module matching "any": 1 candidates
[000055bea8b728e0] main xml reader debug: using xml reader module "xml"
[000055bea8b443c0] main input debug: EOF reached
[000055bea8b3f540] main demux debug: removing module "directory"
[000055bea8b685c0] main stream debug: removing module "record"
[000055bea8b650d0] main stream debug: removing module "playlist"
[000055bea8b63b30] main stream debug: removing module "cache_read"
[000055bea8b62fc0] main stream debug: removing module "filesystem"
[000055bea8aaa4e0] main playlist debug: creating audio output
[000055bea8b72a10] main audio output debug: looking for audio output module matching "any": 7 candidates
[000055bea8b72a10] vlcpulse audio output debug: using library version 11.1.0
[000055bea8b72a10] vlcpulse audio output debug:  (compiled with version 11.1.0, protocol 32)
[000055bea8b72a10] vlcpulse audio output debug: connected locally to unix:/run/user/1000/pulse/native as client #350
[000055bea8b72a10] vlcpulse audio output debug: using protocol 32, server protocol 32
[000055bea8b72a10] pulse audio output debug: adding sink 0: alsa_output.pci-0000_00_1f.3.analog-stereo (Built-in Audio Analog Stereo)
[000055bea8b72a10] main audio output debug: using audio output module "pulse"
[000055bea8aaa4e0] main playlist debug: keeping audio output
[000055bea8b7f200] main interface debug: looking for interface module matching "dbus,none": 19 candidates
[000055bea8b7f200] dbus interface debug: listening on dbus as: org.mpris.MediaPlayer2.vlc
[000055bea8b7f200] main interface debug: using interface module "dbus"
[000055bea8b83430] main interface debug: looking for interface module matching "hotkeys,none": 19 candidates
[000055bea8b83430] main interface debug: using interface module "hotkeys"
[000055bea8b83dd0] main interface debug: looking for interface module matching "globalhotkeys,none": 19 candidates
[000055bea8b83dd0] main interface debug: using interface module "xcb_hotkeys"
[000055bea8aa6570] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[000055bea8b84cb0] main interface debug: looking for interface module matching "any": 19 candidates
[000055bea8b7f200] dbus interface debug: Getting All properties
[000055bea8b7f200] dbus interface debug: Getting All properties
[00007f9f78119ec0] main generic debug: looking for extension module matching "any": 1 candidates
[00007f9f78119ec0] lua generic debug: Opening Lua Extension module
[00007f9f78119ec0] lua generic debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/extensions
[00007f9f78119ec0] lua generic debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/extensions
[00007f9f78119ec0] lua generic debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/extensions/VLSub.luac
[00007f9f78119ec0] lua generic debug: Scanning Lua script /usr/lib/x86_64-linux-gnu/vlc/lua/extensions/VLSub.luac
[00007f9f78119ec0] lua generic debug: Script /usr/lib/x86_64-linux-gnu/vlc/lua/extensions/VLSub.luac has the following capability flags: 0x5
[00007f9f78119ec0] lua generic debug: Trying Lua scripts in /usr/share/vlc/lua/extensions
[00007f9f78119ec0] lua generic debug: Trying Lua playlist script /usr/share/vlc/lua/extensions/vlsub.lua
[00007f9f78119ec0] lua generic debug: Scanning Lua script /usr/share/vlc/lua/extensions/vlsub.lua
[00007f9f78119ec0] lua generic debug: Script /usr/share/vlc/lua/extensions/vlsub.lua has the following capability flags: 0x5
[00007f9f78119ec0] main generic debug: using extension module "lua"
[000055bea8b84cb0] main interface debug: using interface module "qt"
[000055bea8aaa4e0] main playlist debug: processing request item: null, node: Playlist, skip: 0
[000055bea8aaa4e0] main playlist debug: rebuilding array of current - root Playlist
[000055bea8aaa4e0] main playlist debug: rebuild done - 1 items, index -1
[000055bea8aaa4e0] main playlist debug: starting playback of new item
[000055bea8aaa4e0] main playlist debug: resyncing on rtsp://192.168.1.157/main_stream
[000055bea8aaa4e0] main playlist debug: rtsp://192.168.1.157/main_stream is at 0
[000055bea8aaa4e0] main playlist debug: creating new input thread
[00007f9f48000c40] main input debug: Creating an input for 'rtsp://192.168.1.157/main_stream'
[000055bea8aaa4e0] main playlist debug: requesting art for new input thread
[00007f9f48000c40] main input debug: using timeshift granularity of 50 MiB
[00007f9f48000c40] main input debug: using default timeshift path
[000055bea8b84cb0] qt interface debug: IM: Setting an input
[00007f9f48000c40] main input debug: `rtsp://192.168.1.157/main_stream' gives access `rtsp' demux `h26x' path `192.168.1.157/main_stream'
[00007f9f3c000f60] main input source debug: creating demux: access='rtsp' demux='h26x' location='192.168.1.157/main_stream' file='(null)'
[00007f9f3c0010f0] main demux debug: looking for access_demux module matching "rtsp": 20 candidates
[00007f9f34000be0] main meta fetcher debug: looking for meta fetcher module matching "any": 1 candidates
[00007f9f34000be0] lua meta fetcher debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/meta/fetcher
[00007f9f34000be0] lua meta fetcher debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/meta/fetcher
[00007f9f34000be0] lua meta fetcher debug: Trying Lua scripts in /usr/share/vlc/lua/meta/fetcher
[00007f9f34000be0] main meta fetcher debug: no meta fetcher modules matched
[00007f9f34000be0] main art finder debug: looking for art finder module matching "any": 2 candidates
[00007f9f3c0010f0] live555 demux debug: version 2018.02.18
Created new TCP socket 37 for connection
Connecting to 192.168.1.157, port 554 on socket 37...
[00007f9f34000be0] lua art finder debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/meta/art
[00007f9f34000be0] lua art finder debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art
[00007f9f34000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/00_musicbrainz.luac
[00007f9f34000be0] lua art finder debug: skipping script (unmatched scope) /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/00_musicbrainz.luac
[00007f9f34000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/01_googleimage.luac
[00007f9f34000be0] lua art finder debug: skipping script (unmatched scope) /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/01_googleimage.luac
[00007f9f34000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/02_frenchtv.luac
[00007f9f34000be0] lua art finder debug: skipping script (unmatched scope) /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/02_frenchtv.luac
[00007f9f34000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/03_lastfm.luac
[00007f9f34000be0] lua art finder debug: skipping script (unmatched scope) /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/03_lastfm.luac
[00007f9f34000be0] lua art finder debug: Trying Lua scripts in /usr/share/vlc/lua/meta/art
[00007f9f34000be0] main art finder debug: no art finder modules matched
[00007f9f38000be0] main meta fetcher debug: looking for meta fetcher module matching "any": 1 candidates
[00007f9f38000be0] lua meta fetcher debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/meta/fetcher
[00007f9f38000be0] lua meta fetcher debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/meta/fetcher
[00007f9f38000be0] lua meta fetcher debug: Trying Lua scripts in /usr/share/vlc/lua/meta/fetcher
[00007f9f38000be0] main meta fetcher debug: no meta fetcher modules matched
[00007f9f38000be0] main art finder debug: looking for art finder module matching "any": 2 candidates
[00007f9f38000be0] lua art finder debug: Trying Lua scripts in /home/ap/.local/share/vlc/lua/meta/art
[00007f9f38000be0] lua art finder debug: Trying Lua scripts in /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art
[00007f9f38000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/00_musicbrainz.luac
[00007f9f38000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/01_googleimage.luac
[00007f9f38000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/02_frenchtv.luac
[00007f9f38000be0] lua art finder debug: Trying Lua playlist script /usr/lib/x86_64-linux-gnu/vlc/lua/meta/art/03_lastfm.luac
[00007f9f38000be0] lua art finder debug: Trying Lua scripts in /usr/share/vlc/lua/meta/art
[00007f9f38000be0] main art finder debug: no art finder modules matched
...remote connection opened
Sending request: OPTIONS rtsp://192.168.1.157:554/main_stream RTSP/1.0
CSeq: 2
User-Agent: LibVLC/3.0.8 (LIVE555 Streaming Media v2018.02.18)

Received 152 new bytes of response data.
Received a complete OPTIONS response:
RTSP/1.0 200 OK
CSeq: 2
Date: Fri, Nov 11 2022 11:41:04 GMT
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER

Sending request: DESCRIBE rtsp://192.168.1.157:554/main_stream RTSP/1.0
CSeq: 3
User-Agent: LibVLC/3.0.8 (LIVE555 Streaming Media v2018.02.18)
Accept: application/sdp

[00007f9f3c0010f0] live555 demux debug: connection timeout
[00007f9f3c0010f0] live555 demux error: Failed to connect with rtsp://192.168.1.157:554/main_stream
[00007f9f3c0010f0] main demux debug: no access_demux modules matched
[00007f9f3c004ad0] main stream debug: creating access: rtsp://192.168.1.157/main_stream
[00007f9f3c004ad0] main stream debug: looking for access module matching "rtsp": 28 candidates
[00007f9f3c004ad0] satip stream debug: try to open 'rtsp://192.168.1.157/main_stream'
[00007f9f3c004ad0] satip stream debug: connect to host '192.168.1.157'
[00007f9f3c004ad0] main stream debug: net: connecting to 192.168.1.157 port 554
[00007f9f3c004ad0] main stream debug: connection succeeded (socket = 37)
[00007f9f3c004ad0] main stream debug: net: opening 0.0.0.0 datagram port 9180
[00007f9f3c004ad0] main stream debug: net: opening 0.0.0.0 datagram port 9181
[00007f9f3c004ad0] satip stream error: Failed to play RTSP session
[00007f9f3c004ad0] satip stream error: Failed to teardown RTSP session
[00007f9f3c004ad0] main stream debug: net: connecting to 192.168.1.157 port 554
[00007f9f3c004ad0] main stream debug: connection succeeded (socket = 37)
[00007f9f3c004ad0] access_realrtsp stream warning: Cseq mismatch, got 1, assumed 0
[00007f9f3c004ad0] access_realrtsp stream debug: rtsp connected
[00007f9f3c004ad0] access_realrtsp stream warning: only real/helix rtsp servers supported for now
[00007f9f3c004ad0] main stream debug: no access modules matched
[000055bea8aaa4e0] main playlist debug: dead input
[000055bea8b84cb0] qt interface debug: IM: Deleting the input
[000055bea8aaa4e0] main playlist debug: changing item without a request (current 0/1)
[000055bea8aaa4e0] main playlist debug: nothing to play
^C[000055bea8aa6570] main libvlc debug: exiting
[000055bea8aa6570] main libvlc debug: removing all interfaces
[000055bea8b84cb0] main interface debug: removing module "qt"
[000055bea8aaa4e0] main playlist debug: deactivating the playlist
[000055bea8b72a10] main audio output debug: removing module "pulse"
[000055bea8b84cb0] qt interface debug: requesting exit...
[000055bea8b84cb0] qt interface debug: waiting for UI thread...
[000055bea8aa6570] main libvlc debug: exiting
[000055bea8b84cb0] qt interface debug: QApp exec() finished
[000055bea8b84cb0] qt interface debug: Video is not needed anymore
[000055bea8b84cb0] qt interface debug: Killing extension dialog provider
[000055bea8b84cb0] qt interface debug: ExtensionsDialogProvider is quitting...
[00007f9f78119ec0] main generic debug: removing module "lua"
[000055bea8b83dd0] main interface debug: removing module "xcb_hotkeys"
[000055bea8b83430] main interface debug: removing module "hotkeys"
[000055bea8b7f200] main interface debug: removing module "dbus"
[000055bea8aaa4e0] main playlist debug: destroying
[000055bea8b80670] main playlist export debug: saving media library to file /home/ap/.local/share/vlc/ml.xspf.tmp19746
[000055bea8b80670] main playlist export debug: looking for playlist export module matching "export-xspf": 4 candidates
[000055bea8b80670] main playlist export debug: using playlist export module "export"
[000055bea8b80670] main playlist export debug: removing module "export"
[000055bea8aaa4e0] main playlist debug: deleting item `Media Library'
[000055bea8aaa4e0] main playlist debug: deleting item `rtsp://192.168.1.157/main_stream'
[000055bea8aaa4e0] main playlist debug: deleting item `Playlist'
[000055bea8b3ebf0] main keystore debug: removing module "memory"
QObject::~QObject: Timers cannot be stopped from another thread