Recording HDTV chopiness from HD or Capture Card?

[Mormegil]

I occasionally get some choppy bits when recording HDTV (OTA/ATSC). It's really evident with moving frames with a LOT of data that doesn't compress well (like that really busy rock wall texture Faraday was looking at in the Lost premiere opening).


Anyway, I think I've narrowed it down to the recording of the DVR-MS, as it's always in the same spot, and h.264 versions of the same video play back OK.

The CPU utilization when recording is fairly low at around 10%, so I don't think that's the bottleneck.

So is it my Capture Card or HD?

System Specs
CPU: Athlon X2 Dual Core 4800+
Memory: 2GB DDR2
Video: NVidia 9500 GT
Capture Card: WinTV HVR-1600
HD: Samsung 500GB clocked at 55MB/sec average transfer rate by HDTune


If it is the capture card, is the newer 2250 any better? Any other suggestions?

[rob11252]

It might be video card.
You may overclock the card slightly to see if the problem goes away.
The are some setups for the card which can improve things, unfortunately I don't remember the details.

Did you try different video, audio codec, renderer combinations?

I have very similar computer setup, using VRM9 Custom with various codec combinations, didn't notice problem you describing.
Will have to record "Lost" though, maybe it will show up.

[imagn]

So is it my Capture Card or HD?

System Specs
CPU: Athlon X2 Dual Core 4800+
Memory: 2GB DDR2
Video: NVidia 9500 GT
Capture Card: WinTV HVR-1600
HD: Samsung 500GB clocked at 55MB/sec average transfer rate by HDTune


If it is the capture card, is the newer 2250 any better? Any other suggestions?

It could be a few things that come to my mind, but am no expert when it comes to OTA, but it may be signal strenght, i did notice when i set up my card for OTA to do some testing, i would get slight choppyness as in every so often it looked like it skipped a frame. I felt this was more to do with playback and changing renderer, and codecs can help with that.

not sure if it would help any but you can also record in .ts format, perhaps there would be some improvement there.

You system definitely looks capable of HD. I would play around with codecs, i had good success with the K-lite codec pack, probably a bit overkill but i new i needed something in there for my setup to work.

[leprechaun]

What do you think the minimum requirements would be for a OTA ATSC HD system(CPU & Video wise)?

Keep in mind I have to have a micro ATX motherboard with integrated video. Don't have enough room in the case for anything but integrated.

[bdshaffer]

I occasionally get some choppy bits when recording HDTV (OTA/ATSC). It's really evident with moving frames with a LOT of data that doesn't compress well (like that really busy rock wall texture Faraday was looking at in the Lost premiere opening).


Anyway, I think I've narrowed it down to the recording of the DVR-MS, as it's always in the same spot, and h.264 versions of the same video play back OK.

The CPU utilization when recording is fairly low at around 10%, so I don't think that's the bottleneck.

So is it my Capture Card or HD?

System Specs
CPU: Athlon X2 Dual Core 4800+
Memory: 2GB DDR2
Video: NVidia 9500 GT
Capture Card: WinTV HVR-1600
HD: Samsung 500GB clocked at 55MB/sec average transfer rate by HDTune


If it is the capture card, is the newer 2250 any better? Any other suggestions?

You may want to read through this thread about 780g motherboards. It may work for your setup as well.
[URL="http://forums.nextpvr.com/showthread.php?t=40475"]
http://forums.nextpvr.com/showthread.php?t=40475[/URL]

Hardware accelerated deinterlacing is important for 1080i ATSC playback. I would suggest trying ffdshow w/ HA deinterlacing and vmr9 FSE and post your results.

[bdshaffer]

What do you think the minimum requirements would be for a OTA ATSC HD system(CPU & Video wise)?

Keep in mind I have to have a micro ATX motherboard with integrated video. Don't have enough room in the case for anything but integrated.

7 posts and already hijacking threads?

I would suggest a 780g based motherboard. I have one and it works. I will not even offer a guess as to the minimum required hardware.

[Mormegil]

Thanks for the replies.

I was getting previous choppiness, but have settled on the current settings as best (can't remember off the top of my head what they are).

I'm playing around with a RAID 0 (striping) setup, which should give me a faster HD. If that does it, I'll update.

[bizztizz]

I'm not sure if you've fixed your issue yet, but I have a similar setup and have had problems with Lost also. I finally remedied this with an amplified antenna. I only gained a few points of signal strength, but it did the trick. May also have something to do with ABC messing with Lost's signal, as it's the only show i've had these issues with -

http://www.crunchgear.com/2009/01/22/abc...ad-pirate/

[leprechaun]

Whoops, sorry for hijacking... I was in a hurry running out the door, thought I was in the window for my thread. Looks like I was in this one ... I'll blame it on my need for new glasses :p