Tvheadend

RPi 1/2 ?

C vH wrote:

RPi 1/2 ?

It's a pi 2, power supply 2000 mA, tvcard tevii s660 with own power supply.
Discontinuity only appear when watching this special channel (servustv).
Further logs required?

I'm testing this channel using latest tvh (v4.1-385-gf4c6817) and I don't see any reception/parsing errors (but using a SAT>IP server as source). It does not look like a tvh issue. You may try to increase the input buffer (tuner settings), but it may be a problem somewhere else (driver or so).

Before pi 2 I used this tv card with zbox ad02 (fusion e350) with tvheadend and without problems. very strange.

Whats also interesting, when I do a recording, the playback has no hickups glitches or artefacts, problem only exist with livetv.

@perexg
did you test it with an RPi2 ?
I have similar symptoms, at my normal HTPC with AXE no problem at all (tvh master).

At Rpi2 with every tvh version I could test (4.0 and a few 4.1) i get discontinuity errors (~5/min), If I add more the 1 tuner from AXE i get a huge amount of discontinuity errors (absolutely no problem at x64 hardware) even when they are just scanning. CPU and network usage looks pretty okay. Most likely this is a Tvh problem because vdr with sat>ip plugin works without any problem (at RPi2). All settings are default maybe this need some adjustments (no clue witch one).

After further testing, vdr>satip gives me the same problem (vdr seems to hide these errors better at the picture).
Latest RPi2 kernel and fw fixes it (beside the tuner > 1 - could be platform limitation)

@C vH: I think that you hit a network problem for more than one stream. The SAT>IP server is able to feed packets at a higher rate so the network switch / USB network card in Rpi will drop some of them (1G -> 100M issue). Note that I speak about "peaks"/"bursts". The RTP UDP protocol has no packet retransmission mechanism.

problem solved
this did the trick for me:
echo "options dvb_usb disable_rc_polling=1" > /etc/modprobe.d/disableir.conf

false alarm, kodi settings were wrong after update.
sorry for the noise.

this is output of femon -H when tuning to this channel
http://sprunge.us/hMDg

C vH did you solve your issue with rpi2?

issue is still present!

It's not a TVH issue. You should tune probably USB buffers in kernel and increase the input buffer in the TVH tuner settings.

what would be a reasonable value for input buffer in tvh?
has the usb buffers tuning to be done in kernel config?

TVH: The default value is 188000 now, you may increase it to 752000 .

Kernel: You must change the URB buffer count in the appropriate driver. There are some limits - usually visible in the driver's code. It's not an easy tuning.