typical liveTV channel changing speed is??

[toomanyhandles]

Hi all;

Setup the GBPVR about a week ago; minimal teething pains, some plugin issues as I add things to it now but I see others with similar issues on the forum so I don't feel picked upon. This is a Nice Solution. Thanks very much.

One question I have that I've not been able to find a general answer for after searching: what are typical channel changing speeds for my setup? I have live preview "enabled if possible" in the one config menu, and turned on in another, it should be doing its thing. I experience a 5 second delay switching channels in live TV. Live TV buffer is set to 600, I've turned it down a bit without a hugely noticible difference (out of 5 seconds).

Hauppauge PVR-350, 1.8GHZ ASUS MB with NVIDIA chipset, 1 gig RAM, XP Pro, GBPVR 0.95.16. USA, cable, not digital cable.

I thought perhaps my sources for capture solutions might not be setup properly, but nothing in there looks intuitively correct, whether I'm adding new or editing current.
2 listings present:
"Device 1-tuner", BDA recording plugin, XMLTV for EPG, no channel changer
"my source", direct recording plugin, Zap2it, Hauppauge IR blaster.

I looked at the tuning assistant and the utility to rip the channel tuning from WinTV, but I see no where to type in the exact freq. in the config app, and I thought that was really only for Europe, and I'm in the US.

Thanks for help;

Brian

[gEd]

this is currently being discussed on this thread

http://forums.nextpvr.com/showthread.php...ht=seconds

Why do you refer the BDA recording plugin?
This is for DVB devices, not for the 350. Although I guess that if the 350 is not configured properly, you wouldn;t get any tv, let alone have a problem with slow channel change!

[toomanyhandles]

Thanks for the reply. What *should* I be using for TV-in on the 350? Default install stuff for GBPVR worked; and looking for something called "PVR 350 source" didn't show much. I'm sure it's using the direct recording plugin with the zap2it EPG for the actual video-in signal. I'll try whacking the unused source.

I had seen the other post; they mention 7-15 seconds as long. Is 5 seconds as good as it gets? What are *your* channel changing times?

I didn't mention in the first post that my signal comes out through the 350's s-video; I'm not using the GForce cards s-video out + overlay.

I'm at 5 seconds almost exactly which is what the other poster achieves as a best case with changing things around. I'm a very fresh XP Pro install; just built this box a week ago.

Thanks,

Brian

[sub]

One question I have that I've not been able to find a general answer for after searching: what are typical channel changing speeds for my setup? I have live preview "enabled if possible" in the one config menu, and turned on in another, it should be doing its thing.

Assuming you're not using not using the TV-out on your PVR350 (ie, Hardware Decoder set to 'none - use software decoding'), then channel changes should be taking about a second. If you've using an IR Blaster to control an external set top box, add an additional 1.5 to 2 second to this time.

[gEd]

my 350 config looks like this

http://forums.gbpvr.com/attachment.php?a...1139159403
350.JPG

my channel change on the 350 is < 2secs but that is with software decoding (i don;t use the hardware output on the 350)

[toomanyhandles]

>Assuming you're not using not using the TV-out on your PVR350 (ie, >Hardware Decoder set to 'none - use software decoding'), then channel >changes should be taking about a second. If you've using an IR Blaster to >control an external set top box, add an additional 1.5 to 2 second to this >time.

I am using the TV-out on the PVR350. I could be using the s-video out on my g-force card; I thought that would hurt performance but if it helps then I can switch.

I am using the IR/remote that came with the PVR350; which shows up in my current config as the IR Blaster; whether that's correct or not I do not know. I assume it is, and there will be the same lag as I'd see controlling a set top box as you describe, due to the time it takes to send the IR command?

Thanks for the help; I would like to trim the channel changing lag down. So- switching to the AGP card s-video out should result in the best I can achieve then?

[gEd]

I am using the IR/remote that came with the PVR350; which shows up in my current config as the IR Blaster; whether that's correct or not I do not know.

No it's not - you're channel changer should be set to none if you are only using the remote supplied with the 350.

switching to the AGP output should improve channel changing speed and generally make the 350 more stable but you may notice a drop in image quality.

There are several threads around on how to maximise the svideo output quality from your graphics card.

[sub]

I am using the TV-out on the PVR350. I could be using the s-video out on my g-force card; I thought that would hurt performance but if it helps then I can switch.

If you're using the TV out on your PVR350, then you're forced into timeshift mode. If you use a regular video card, you're also able to use live preview mode, which has much faster channel change times.

[toomanyhandles]

If you're using the TV out on your PVR350, then you're forced into timeshift mode. If you use a regular video card, you're also able to use live preview mode, which has much faster channel change times.

OH I see. I didn't catch that somehow.

Thanks! I guess I will see what quality hit I take on the vid out from the graphics card then. I notice quality issues though so maybe the channel changing speed is the tradeoff I will end up making.