G'day all,

I have 3 DVB's and 1 pvr350.

Recording and watching from all cards is fine.


Watching live TV from pvr350 is OK but from the DVB cards it is not.
It is like using VOIP where packets are being lost, I think the video is OK but the audio is choppy. (but that might be me noticing the audio more then the video)

Watching live TV, pressing record and then watching the recording is fine, so it can't be the stream to disk that is the problem, it is getting the data off the disk.

Any ideas what the issue might be?
Memory seems OK.


vmstat 3
Shows anywhere from 70 to 90 id on both cards.
In fact the output from vmstat is nearly identical when using each card type.

I thought about IRQ's and I have a less then ideal situation on one of the DVB cards.

but changing to another DVB card makes no difference.


I am thinking of building a new FE and moving ones of the cards to it, we can get HD over DVB-S but this FE/BE does not have enough grunt.

Anu ideas on what the issue might be?

_________________
--
stinga

as of 17-May-2018
R8.2 - sort of working.
MB: gigabyte GA-P43-ES3G | RAM: 2GB
VGA: PNY Nvidia GT240 1GB
4 x Technisat skystar 2 dvb | 1 x TBS6981 dvb-s2
pata: 1x300Gb | sata: 2x1Tb 2x2Tb
Problems:
TBS6981 Does not work.

Your join date says you probably already know about
XvMc and how much it helps if you have an Nvidia card
although I am not sure it helps anything but Mpeg2 playback.

That Sempron sounds a little weak if you are trying to play
HD at all.

Did I hear you say that you can watch a recording while
it is recording, but you cannot watch live TV which should
be the same? These should be the same except for maybe
squeezing it all in one set of buffers when playing live, which
should make live better if anything.

Do you have a different recording profile for live vs. recorded?

You may swap the cards around into different slots as 5
slot motherboards share an IRQ, usually between slots 4 and
5. If you set the BIOS to "Pnp OS = NO" it will assign irq's
and print them out just before boot up. I used to use this
to move cards off of shared IRQ's as a first pass hardware
setup trick before installing an OS.

Are you running a PCI or an AGP fx5200? My understanding
is that AGP (e.g. AGP 8x) is better than even PCIx.

On a PATA Athlon 1400 system (pvr-350) I get over 45
mbytes a second from dd.

should take less than 30 seconds to run for a test.

You may use hdparm to try "unmask IRQ" for your hard drive,
but backup or research the data corrupting possibilities first.

Good luck,
Cliff

_________________
R5F27 using R5F1 Nvidia drivers
HD-5500 analog from NTSC Sat Rx, with OTA DVB too
GeForce MX-440 SVideo tvout to a TV
Older dual core 3.4ghz Intel CPU
Asus P5PE-VM Motherboard
2 GB RAM
1 TB LVM2
VirtualBox
Samba

I have the exact same problem. Watching live TV with my Air2PC is very choppy, but starting a recording, and watching that recording is fine. I also have a PVR150 that works as it should for live TV. Myth is supposed to be acting the same for live TV and recordings, but it seems it is not, and I have not been able to find a fix for it. Good luck and post up if you find a fix.

_________________
Increasing my couch potatoness by a factor of pie.

G'day,

Yes, I know about XvMc and nvidia cards.
Not doing HD at the moment, but plan to soon and then a new FE will be needed.

Yes, I can watch a recording while recording it and the play back is fine.

Since DVB is an mpeg2 stream and it just gets dumped to disk there is nothing settable in the "Live TV" profile for those devices.
That could be a factor, because I can set the pvr350.

I don't think swapping cards is going to make much difference, since it happens on all DVB cards, and 2 of the 3 are on their onwn IRQ.

AGP fx5200





Maybe solved!!
There is a setting in the FE setup called "extra Audio buffering", I have set this and the problem seems to have gone away.
I have not done extensive watching though to see if it really has gone.[/b]

_________________
--
stinga

as of 17-May-2018
R8.2 - sort of working.
MB: gigabyte GA-P43-ES3G | RAM: 2GB
VGA: PNY Nvidia GT240 1GB
4 x Technisat skystar 2 dvb | 1 x TBS6981 dvb-s2
pata: 1x300Gb | sata: 2x1Tb 2x2Tb
Problems:
TBS6981 Does not work.

Maybe solved!!
There is a setting in the FE setup called "extra Audio buffering", I have set this and the problem seems to have gone away.
I have not done extensive watching though to see if it really has gone.[/b][/quote]


This seems to have worked on mine also! Both HD and SD ATSC channels play fine now. Suiteness.

_________________
Increasing my couch potatoness by a factor of pie.