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Search took 0.02 seconds; generated 13 minute(s) ago. Search: Posts Made By: trevlac
Forum: Capturing Video 17th December 2003, 17:44
Replies: 10
Views: 1,772
Posted By trevlac
Pulling the hard drive out of the PVR and copying...

Pulling the hard drive out of the PVR and copying the files to your computer retains the most info. What PVR do you have? PQ may possibly be increased by the use of filters, but PQ is kinda...
Forum: Capturing Video 15th December 2003, 04:28
Replies: 61
Views: 48,142
Posted By trevlac
You're not kidding on the math. I really did...

You're not kidding on the math. I really did read that last one about 20 times before it started to sink in. Your pictures actually helped a lot. When I noticed they matched, I said "wow".

Here...
Forum: Capturing Video 14th December 2003, 04:42
Replies: 61
Views: 48,142
Posted By trevlac
@Arachnotron I've been reading a bunch and...

@Arachnotron

I've been reading a bunch and here is what I am guessing on this stuff today. :)

1) Sampling Theorem says "A signal can be reconstructed from its samples without loss of...
Forum: Capturing Video 11th December 2003, 19:26
Replies: 1
Views: 940
Posted By trevlac
I can't say I'm an expert in this, but I have...

I can't say I'm an expert in this, but I have been reading a bit lately. Here is what I think I know.

The original source is basically YUV which in codec terms is YUY2 or UYVY or YVYU which are...
Forum: Capturing Video 11th December 2003, 17:45
Replies: 61
Views: 48,142
Posted By trevlac
I do own it. It's a bit old. There is a...

I do own it. It's a bit old. There is a newer/cheaper one at Amazon.co.uk (http://www.amazon.co.uk/exec/obidos/ASIN/B00009WW03/qid=1071161361/sr=1-1/ref=sr_1_10_1/026-5855084-6082055).

I have...
Forum: Capturing Video 11th December 2003, 14:17
Replies: 61
Views: 48,142
Posted By trevlac
They work for me on different machines. They use...

They work for me on different machines. They use javascript to show the image because my provider does not allow direct links to images.

The direct links are below. To use them you have to paste...
Forum: Capturing Video 11th December 2003, 03:52
Replies: 2
Views: 1,485
Posted By trevlac
I can't say I know much about VCRs. However, I...

I can't say I know much about VCRs. However, I do have a HR-S3911U. It's not a bad machine. I'm not sure what you mean by family tapes. If they are vhs tapes, it was my understanding that Y&C are...
Forum: Capturing Video 10th December 2003, 20:11
Replies: 61
Views: 48,142
Posted By trevlac
@Arachnotron I don't really have anything to...

@Arachnotron

I don't really have anything to add. I just wanted to thank you for the test pic and all of the work you have been doing on this. I havn't been able to run the test myself (busy...
Forum: Capturing Video 10th December 2003, 15:22
Replies: 3
Views: 1,089
Posted By trevlac
Re: MSI TV @nywhere Master

I have one of these cards. This may repeat what others have said, but I'd thought I'd chime in. :)

I'm not sure where you can buy from, but there are lots of cards with s-video in even without...
Forum: Capturing Video 9th December 2003, 20:45
Replies: 61
Views: 48,142
Posted By trevlac
@Arachnotron For some strange reason I love...

@Arachnotron

For some strange reason I love this stuff. :D

Some observations form a guy who has no formal education in electrical engineering.

1) I don't see why a 13.5MHz card could not...
Forum: Capturing Video 9th December 2003, 15:08
Replies: 61
Views: 48,142
Posted By trevlac
Hey, So many interesting things .... ...

Hey,

So many interesting things ....


Does this mean that the card's resize causes an interference pattern in the picture? Would it be better to cap at full size and then resize? Maybe I...
Forum: Capturing Video 9th December 2003, 15:03
Replies: 25
Views: 6,618
Posted By trevlac
I think 80004005 is a generic microsoft access...

I think 80004005 is a generic microsoft access error. Regardless, the following things may not let you set custom frame sizes.

1) Application (virtualVCR does allow custom sizes)
2) Driver...
Forum: Capturing Video 6th December 2003, 19:17
Replies: 25
Views: 6,618
Posted By trevlac
But I thought it said that for height. Width is...

But I thought it said that for height. Width is ok at mod 2. I think if you don't deinterlace and you are not going for a height of 576, 288, or 144, you are asking for trouble. 384 for example is...
Forum: Capturing Video 6th December 2003, 03:49
Replies: 25
Views: 6,618
Posted By trevlac
I'll point Arachnotron to your calculation. I...

I'll point Arachnotron to your calculation. I wanted to add the following to help people reading this. A confusing thing is that 640 = 762. This is because 640 units are wider than the 762 units....
Forum: Capturing Video 6th December 2003, 03:41
Replies: 103
Views: 29,148
Posted By trevlac
The footnotes were left over from Wilbert's...

The footnotes were left over from Wilbert's original. They may not apply. I was tired by the end and figured I should get feedback before I worried about proper footnotes.

Some things I have...
Forum: Capturing Video 5th December 2003, 05:49
Replies: 24
Views: 4,876
Posted By trevlac
Analog is not natively RGB. I believe PAL is...

Analog is not natively RGB. I believe PAL is close to YUV and NTSC is like YUV but YQI. A BT878 will create pixels in packed YCrCb 4:2:2 format. From here it converts to many formats such as YUY2,...
Forum: Capturing Video 5th December 2003, 05:23
Replies: 25
Views: 6,618
Posted By trevlac
I've very much enjoyed our conversation. I was...

I've very much enjoyed our conversation. I was hoping you were not angry with my dezlānat talk. I'm happy to continue. I will be out of town for a few days, so it may take some time for my next...
Forum: Capturing Video 5th December 2003, 01:46
Replies: 24
Views: 4,876
Posted By trevlac
I didn't know it needed to be a factor of 4. I...

I didn't know it needed to be a factor of 4. I thought it was 2 because there are 2 pixels in a 32 bit 4:2:2 macro pixel. I'll have to run some tests on different codecs I use.

Thanks
Forum: Capturing Video 4th December 2003, 22:28
Replies: 24
Views: 4,876
Posted By trevlac
@Angelus What was your codec ? Thanks

@Angelus

What was your codec ?

Thanks
Forum: Capturing Video 4th December 2003, 19:58
Replies: 103
Views: 29,148
Posted By trevlac
I just wanted to make some corrections to my...

I just wanted to make some corrections to my macro pixel comments.

For Packed 4:2:2 fromats like YUY2, each macropixel is 4 bytes (16 bits per pixel) and contains 2 pixels. YV12 is not packed so...
Forum: Capturing Video 4th December 2003, 15:20
Replies: 103
Views: 29,148
Posted By trevlac
My experience is also that factors of 2 are what...

My experience is also that factors of 2 are what is needed. I assume this is because 2 pixels share color information for 4:2:2, in 24 bytes. So samples are converted to pixels in groups of 2. ...
Forum: Capturing Video 4th December 2003, 15:10
Replies: 103
Views: 29,148
Posted By trevlac
@wilbert I made a copy of the guide preface...

@wilbert

I made a copy of the guide preface with my proposed changes.
http://trevlac.us/preface.htm

I tried to follow the original outline. The things I wanted to change were 1) Fit in new...
Forum: Capturing Video 4th December 2003, 02:34
Replies: 25
Views: 6,618
Posted By trevlac
I'm sorry. Again I am being unclear. I'll try to...

I'm sorry. Again I am being unclear. I'll try to answer your simple question.

If you capture at 640/576 with the iUlabs driver, you are capturing 51.56 microseconds at a rate of about 12.41MHz. ...
Forum: Capturing Video 3rd December 2003, 22:59
Replies: 103
Views: 29,148
Posted By trevlac
You guys speak french too !?! I feel so...

You guys speak french too !?!

I feel so inadequate :stupid:
Forum: Capturing Video 3rd December 2003, 02:16
Replies: 25
Views: 6,618
Posted By trevlac
Thanks for responding. I'm trying to come up...

Thanks for responding. I'm trying to come up with an easy way to explain all of this. I'm testing on you.

1) 14.769 sample rate * 51.56 microseconds = 762x576 PC pixels. If you'd rather crop...
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