Hello, I did a lot of trouble shooting two new DVB-T multiplexes in Prague (Czech republic). Problems are dropouts and errors in the picture. After approximately 10 minutes xine crash : "floating point error" and VDR do reload. It is occurring only on that two multiplexes. I did checks for signal and stream quality and it is good, details attached.

In the log is: 200 frames delivered, 17 frames skipped, 0 frames discarded 200 frames delivered, 10 frames skipped, 0 frames discarded 200 frames delivered, 20 frames skipped, 0 frames discarded

This is there for MPEG2 streams, for h264 streams it is different.

I think it is buffer underrun, all (my) problems with buffer overflow is due to xine playing incomplete/corrupted data.

I did tests on 1.7.38, 2.0.0 and 2.1.1. Ffmpeg and xine are now on latest versions. DVB drivers are from kernel 3.7.1. Two different dvb-t cards. Behavior had been same.

Could you suggest, what next to test?

Thank you Milos

Debug outputs:

VDRPRG="./vdr -p 2001 -P"remote -i /dev/my_remote" -P femon -P dvbhddevice -P"xineliboutput --local=sxfe --video=xv --audio=alsa:hw:0,3 --remote=none" -v /video0 "

Lspci 04:02.0 Network controller: Techsan Electronics Co Ltd B2C2 FlexCopII DVB chip / Technisat SkyStar2 DVB card (rev 02) Subsystem: Techsan Electronics Co Ltd B2C2 FlexCopII DVB chip / Technisat SkyStar2 DVB card Flags: bus master, slow devsel, latency 32, IRQ 18 Memory at fbde0000 (32-bit, non-prefetchable) [size=64K] I/O ports at cf00 [size=32] Kernel driver in use: b2c2_flexcop_pci

04:03.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) Subsystem: Technotrend Systemtechnik GmbH Technotrend-Budget/Hauppauge WinTV-NOVA-T DVB card Flags: bus master, medium devsel, latency 32, IRQ 16 Memory at fbdff000 (32-bit, non-prefetchable) [size=512] Kernel driver in use: budget_ci dvb

channels.conf: TELKA;Digital Broadcasting s.r.o.:642000000:B8C34D12G8M64S0T8Y0:T:0:3611=2:3612=cze@3:3615:0:518:8395:1025:0 Stream check VDR2:/usr/src/VDR# dvbsnoop -ph 0 -adapter 0 -crc -n 100000 -s bandwidth 0x0e1b dvbsnoop V1.4.50 -- http://dvbsnoop.sourceforge.net/

--------------------------------------------------------- PID bandwidth statistics... PID: 3611 (0x0e1b) - max packet count: 100000 --------------------------------------------------------- packets read: 28/(28) d_time: 0.004 s = 10528.000 kbit/s (Avrg: 10528.000 kbit/s) [bad: 0] packets read: 34/(62) d_time: 0.021 s = 2435.048 kbit/s (Avrg: 3729.920 kbit/s) [bad: 0] ... packets read: 29/(99977) d_time: 0.019 s = 2295.579 kbit/s (Avrg: 2580.893 kbit/s) [bad: 0] packets read: 30/(100007) d_time: 0.021 s = 2148.571 kbit/s (Avrg: 2580.737 kbit/s) [bad: 0] ## PID: 3611 (0x0e1b) bad/total packets: 0/100007 (= 0.0%) Avrg: 2580.737 kbit/s VDR2:/usr/src/VDR# dvbsnoop -ph 0 -adapter 1 -crc -n 1000 -s signal 0x0e1b | grep -v "SIG CARR VIT SYNC LOCK" dvbsnoop V1.4.50 -- http://dvbsnoop.sourceforge.net/

Signal check --------------------------------------------------------- Transponder/Frequency signal strength statistics... max cycle count: 1000 --------------------------------------------------------- VDR2:/usr/src/VDR# dvbsnoop -ph 0 -adapter 1 -crc -n 100000 -s signal 0x0e1b | grep -v "SIG CARR VIT SYNC LOCK" dvbsnoop V1.4.50 -- http://dvbsnoop.sourceforge.net/

--------------------------------------------------------- Transponder/Frequency signal strength statistics... max cycle count: 100000 --------------------------------------------------------- VDR2:/usr/src/VDR# dvbsnoop -ph 0 -adapter 0 -crc -n 100000 -s signal 0x0e1b | grep -v "SIG CARR VIT SYNC LOCK" dvbsnoop V1.4.50 -- http://dvbsnoop.sourceforge.net/

--------------------------------------------------------- Transponder/Frequency signal strength statistics... max cycle count: 100000 ---------------------------------------------------------

VDR signal debug, it is same for both cards.

FE 1/0: 13D02103 Q = FFFF D8D8 1 0 0 84% FE 1/0: 13D02103 S = FFFF EC5F 92% FE 1/0: 13D02103 Q = FFFF DDDD 1 0 0 86% FE 1/0: 13D02103 S = FFFF EE1F 93% FE 1/0: 13D02103 Q = FFFF DADA 1 0 0 85% FE 1/0: 13D02103 S = FFFF ECCF 92% FE 1/0: 13D02103 Q = FFFF DADA 1 0 0 85% FE 1/0: 13D02103 S = FFFF EE5F 93% FE 1/0: 13D02103 Q = FFFF D8D8 1 0 0 84% FE 1/0: 13D02103 S = FFFF ED7F 92%