VOGONS


First post, by Zup

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I'm trying to use an not-so-old computer to capture video from VHS, but I've ran into some strange problems.

My system specs:
- Motherboard Gigabyte GA-7VT600 (KT600 based, with Realtek audio codec, 1xAGP 8x and 5xPCI).
- Athlon XP2400
- 1 Gb DDR 400
- ATI Radeon 9200SE 128Mb PCI
- Best Buy EasyTV (seems it is a Flyvideo 98 clone)

The software I'm trying to use is:
- Windows 2000 Pro.
- Virtualdub 1.9.10.
- Lagarith and Huffman video codecs (later, I'll convert the video using ffmpeg... so no need to install xvid, divx or another mp4 video codec).
- BTwincap drivers.

Some of my troubles:
- At first, I tried to use it with a Geforce 5200 and TV card in slot PCI 3, but system didn't boot. Then I tried with a Geforce 4200Ti, it booted and installed Windows and all the drivers, but the video capture driver showed a warning. When I moved the board from slot, it didn't boot at all.

- Then, I put the TV card into slot #1 (it seemed like a INT problem to me), and the ATI 9200 into slot #2. It worked but still showed the warning.

- Moving the TV card back and forth, it showed that it booted only when placed in PCI slot #1 or #3 (I don't know why). After looking into the BIOS, it showed that ALL the PCI slots shared INT with USB devices (I don't know why). Disabling USB devices removed the driver warning.

Any suggestion to get working both USB devices and TV card?

Also, I have a Roxio USB and a EasyCap clone video capture device. I'm trying to use the BT879 card because I thoughtit will have better quality, but I'm not really sure. Does any of the other devices have better quality than the PCI card?

What resolution settings would be fine for a VHS video using a SVHS input? I'm pretty sure that 720x576x25fps and 44.1 stereo capture would be a waste, but I don't know what settings would be good quality without wasting resources.

Keeping in mind that video source will be a 6 head PAL VHS video... do you recommend to change the sound card? The codec is a Realtek ALC655, the alternatives are a Sound Blaster PCI128 or a Sound Blaster Live! 5.1.

I have traveled across the universe and through the years to find Her.
Sometimes going all the way is just a start...

I'm selling some stuff!

Reply 2 of 5, by sklawz

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hi

my advice may be incorrect as it's a long time since
i even came across a win2k machine but i seem to
remember there being issues with IRQ sharing or
IRQ balancing with that O/S. You may need to disable
ACPI and re-install it as a regular PC rather than an
ACPI PC.

perhaps relevant though is that your setup may be
a little slow to handle raw video streams direct to
disk. it may be trial and error on your part to find
a resolution which will be satisfactory without frame
drops.

somewhat related to this, in the past i have found
a satisfactory solution to your problem using a hardware
mpeg card (eg PVR-350) to capture to disk within
linux. that would record directly as MPEG2 ready for
DVD (no transcoding required).

Later i would edit the stream in XP using
womble DVD. this provides a good solution
IMHO. AVIDEMUX may be an option but womble is
easy to use.

you may want to see if there are any PVR-350s on ebay
which i assume people are offloading relatively cheaply
these days.

bye

Reply 3 of 5, by leileilol

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GXL750 wrote:

320x240 is pretty close to actual VHS resolution.

NO WRONG

720x240 (480i interlaced) != 320x240
plus you can deinterlace a good 720x480 image out of 30fps stuff

I would use Virtualdub for capture, and my experience with BT878 is how unbearably noisy it was for video... try the others you've got first

apsosig.png
long live PCem

Reply 4 of 5, by Zup

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@sklawz: Do you think that those IRQ sharing issues would dissapear in Windows XP?

Also, I think that speed won't be an issue... I remember capturing without frame drops with my old Athlon 1 Ghz. I was using huffyuv codec, that reduced the video stream enough to cope with bandwidth limitations.

Also, I don't want to buy another video capture device (in fact, when this task is done, I'm getting rid of both the video capture card and the VHS video).

@leileilol: I thought that USB devices would impose a bigger CPU load, with more frame dropping, so if I resort to one of those things, I would use a better computer ( = SATA HDDs, dual core, etc). Do they offer better quality than the older BT878? Will performance be enough to capture video without frame dropping?

I have traveled across the universe and through the years to find Her.
Sometimes going all the way is just a start...

I'm selling some stuff!

Reply 5 of 5, by sklawz

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hi

memory is vague but i do recall seeing
problems from the win2k era but not
after with winxp. with XP you probably
should ensure ACPI plus IO-APIC is
enabled and not just the legacy XT-PIC.

Your mainboard probably has both
options somewhere.

XP should in theory respect the int
order as found in your manual where
it will suggest which slot is shared with
usb.

one thing to remember though is that
pci cards with more than one function
that demands an irq will also use the
next irq slot along the chain.

bye

edit:spelling