Hi, I´m kind of annoyed that TV channel switching with the Pi 4 takes much longer than with my previous Pi 3B (no +). I´m currently running libreelec 9.2.8, tvheadend 4.2 with a Sundtek MediaTV Digital Home III, same as I used with the Pi 3B. Channel switching takes around 7 seconds and used to be approx. 1-2 seconds with the Pi 3B.
I already tried with a different SD, fresh install, running the OS from a SSD, Libreelec 10.0.1 and a second Pi 4 with 2GB instead 4GB, same behaviour with all methods.
Does anybody experience the same behaviour or has an idea how I can speed up channel switching?
Thanks in advance
L
Slow channel switching with Pi4
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lotte67890 -
November 30, 2021 at 5:01 PM -
Thread is Unresolved
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my 2 ct:
- did you compared the TvH setting (Pi3/Pi4) e.g. made a photo with a digicam/smartphone ?
- if you're still in possession of the elder TvH setting [1] why not copy it over somehow with a subseq. reboot ?
- try TvH 4.3 if available (?! ) from here:
Tvheadend nightly builds for LibreELEC
I don't know if RPi2/3 will run on RPi4 too !
[1]
I guess it's this file
/storage/.kodi/userdata/addon_data/service.tvheadend*/config
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Check the CPU frequency of the RPI? If there's some clock slow-down that might extend the switching time enormously.
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Well, I can see the idle cpu frequence is 750MHZ and while channel switching is active I can see:
As said, not even a fresh install or Libreelec 10.0.1 changes this behaviour.
My config.txt is:
Code
Display Morecat /flash/config.txt # SPDX-License-Identifier: GPL-2.0-or-later # Copyright (C) 2009-2014 Stephan Raue ([email protected]) # Copyright (C) 2016-present Team LibreELEC (https://libreelec.tv) ################################################################################ # Bootloader configuration - config.txt ################################################################################ ################################################################################ # Memory (System/GPU configuration ) ################################################################################ # Default GPU memory split - at least 288M is needed for some 4k HEVC files gpu_mem=512 ################################################################################ # For overclocking and various other settings, see: # https://www.raspberrypi.org/documentation/configuration/config-txt.md ################################################################################ # Set 'force_turbo=1' to disable dynamic overclocking and enable overclocking always. force_turbo=0 # Force HDMI even if unplugged or powered off # hdmi_force_hotplug=1 # Doesn't sent initial active source message. # Avoids bringing CEC (enabled TV) out of standby and channel switch when # rebooting. hdmi_ignore_cec_init=1 ################################################################################ # End of default configuration ################################################################################ dtoverlay=gpio-ir dtparam=audio=off hdmi_drive=1 hdmi_force_hotplug=1 max_usb_current=1 dtparam=i2c_arm=off decode_MPG2=0x12345678 decode_WVC1=0x12345678 dtparam=sd_poll_once=on ################################################################################ # Include distribution specific config file if it exists. ################################################################################ [all] include distroconfig.txt@JO thanks for the hint, but the first thing I tried was using the installation from the PI3, after that I tried with a fresh install, SSD, and so on.. No changes...
Are my GPU Memory settings to high?
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Ok, I found the cause, when I use HDMI as Audio output the delay is gone. My default Audio device is an USB Audio DAC. Nevertheless I wonder why this slows down channel switching. It does not happen when playing Music or watching local or remote Video.
Any suggestions are welcome.
Thanks
L
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I pasted a debug log to:
Currently I also opened a thread in the kodi forum, but In the end I´m completly unsure whether this is a kodi, libreelec, tvheadend or a sundtek issue... So if anybody could advice me to whom to address this issue I would be gladful...
Thanks
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You may also try the latest LE 11 Nightly build to see if the issue persists...
