v17 LibreELEC Testbuilds for RaspberryPi (Kodi 17.0)
(2016-07-16, 22:14)smp1 Wrote: Yes. I even tried to underclock the RAM to 400 for testing.
"arm_uc=15" + "sdram_freq=400" - no errors
"arm_uc=10" + "sdram_freq=400" - huge amount of errors
I guess it was not a RAM bandwidth issue afterall.

The issue is the large amount of bandwidth the deinterlace consumes increases the sdram latency the arm sees.
Some (but not all) DVB USB devices drop packets if they are delayed at all.

The problem with increasing the arm sdram priority (which is what your setting does), is that if the arm now does a large memcpy
it will dominate the bus and probably cause the deinterlace to be slow and potentially skip a frame.

The v3d_limiter setting keeps the deinterlace at higher priority than the arm, so the arm can't interfere, but also leaves gaps where
other users can get in. That would be the preferred solution to get working.


Messages In This Thread
RPi2: no DV-codec? - by bubi - 2016-07-10, 10:30
RE: LibreELEC Testbuilds for RaspberryPi (Kodi 17.0) - by popcornmix - 2016-07-17, 12:26
DV-video not working - by bubi - 2016-07-15, 19:48
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