RPi4 / Libreelec nightly / fast-forward doesn't work

I am using the latest Libreelec nightly, e.g. https://test.libreelec.tv/LibreELEC-RPi4…-ab55701.img.gz, on a RPi4 with 4GByte RAM.

Basically Kodi is running well, except seeking fast forward/backward for streamed videos. Kodi is playing video streams as long as they are not interrupted (fast-forward or pause). Fast-forward for locally stored mp4 file on my NAS is working. My monitor supports a resolution of 2440 x 1440.

I've tried several options in configt.txt, but failed to get the fast-forward working.

What is a working config.txt ?

Are there other important Kodi settings I need to check?

Thanks a lot in advance.

Thanks for your hint.

gpu_mem=128 at config.txt didn't fix my problem.

Here my config.txt:

config.txt

When I try to seek in a e.g. an Arte 720P H264 video stream, the video first freezes and aborts a few seconds later.

Thanks for this hint.

I added an advancedsettings.xml at /storage/.kodi/userdata/advancedsettings.xml and then rebooted.

advancedsettings.xml.txt

Half of the 4GByte RAM of my RPi4 are now allocated as cache.

Unfortunately, no change. When I try to seek, the video first freezes and then aborts after a few seconds.

Did this:

advancedsettings.xml.txt

No change

Here the kodi.log:

kodi.log

Thanks for your advice!

Currently I am failing to upload log file by 'ssh - pastekodi' . pastekodi seems not to come to an end with the upload. I need some time to get familiar with the requested procedure. I will try again tomorrow.

An (manual) upload to ix.io seems not to be possible:

* We are completely uploaded and fine

Therefore pastekodi stalled.

I've uploaded my debug log file manually as kodi.log to https://paste.kodi.tv.

Thanks a lot for your deeper analysis of my problem in advance.

Further tests revealed that the root cause of my problems is the addon 'Arte Mediathek' V2.0.1 from sarbes. Several other Mediathek addons are working properly. I addressed this to sarbes in another thread.