capture card how does it work

ryu:

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ryu: 2010-06-18 06:40:27 am

2010-06-18 06:40:07 am

I kinda always wanted one but wasn't sure how exactly it worked.

A generally recommended card would be cool too. I only know of dazzle, but I'm not even sure if that's really what's needed for recording stuff from the TV to the PC.

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Poision Envy:

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Poision Envy

2010-06-18 02:37:05 pm

Death to skinfags, sieg heil.

Miracles. Miracles and magic up in this bitch.

No but seriously I'm not sure how they work either.

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Idkbutlike2: 2010-06-18 03:28:04 pm

2010-06-18 03:26:21 pm

Everlasting Turquoise

They allow a computer to receive video and audio signals from a TV set. What you do with the data from the card when you're done using it is up to you. I think their original purpose was analog-to-digital conversions (f.e video to DVD), but I could be wrong...

Gaius_4:

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Gaius_4: 2010-06-18 03:57:03 pm

2010-06-18 03:56:12 pm

Sounds like a good way to indirectly get vids onto Youtube.

*interested*

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Idkbutlike2: 2010-06-18 05:26:40 pm

Idkbutlike2: 2010-06-18 05:26:19 pm

2010-06-18 05:26:11 pm

Everlasting Turquoise

Well, they're what people who do LPs with real consoles instead of emulators often use to record their videos.

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nate

2010-06-18 10:17:39 pm

君だけの

光になると

http://speeddemosarchive.com/kb/Video_Capture_Devices

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BioSpark

2010-06-18 11:01:06 pm

hʌŋ laɪk

ə hɔːrs

looks like that page could use some more work.

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horscht(i)

2010-06-19 04:10:52 am

defrag in progress

Quote from ryu:

A generally recommended card would be cool too. I only know of dazzle, but I'm not even sure if that's really what's needed for recording stuff from the TV to the PC.

What do you want to do with a capture device?
I have a rather simple USB model that comes with some cinch and a s-video connector to record my Wii from time to time.
Works pretty well, but only produces interlaced video. So some post-processing is needed.

ryu:

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ryu

2010-06-19 05:09:58 am

I want one for recording from my TV while playing consoles, yeah.

Problem's I don't know jackshit about anything. Gotta read the sda article later on

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horscht(i)

2010-06-19 05:20:52 am

defrag in progress

Then you basically need nothing more than a simple capture device and VirtualDub for recording.
I bought the TerraTec Grabby some time ago and it perfectly fits my needs.
If you want to record on a regular basis, then a internal capture card might be a better solution. Have a look for Hauppauge.

tate:

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tate

2010-06-30 12:11:16 pm

I guess this topic fits as good as any. I am currently looking for a way to capture video on my computer through a capture card/usb device/express card/fire wire or whatever would work. I have a macbook pro late 07 to work with here. It would also be nice if i could use it to stream live on ustream. There seems to be tons of options if i were on a pc but im not. I have been looking at the Dazzle video recorder and the Elgato Video Capture.

My reason for trying to get a capture card or whatever it is, i currently use a dvd recorder and it takes forever to finalize, rip to computer, trim, time, and then go back to recording. If i can have it capture directly to the computer then i can automate the whole process including the trimming with the press of a single button through my own concoction of anri-chan and ffmpeg which would save me headaches and money in the long run(no more dvds).

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nate

2010-06-30 03:45:47 pm

君だけの

光になると

don't want to install windows in boot camp or vmware?

if not, do you want to test drive this thing for me? ;)

http://www.chinavasion.com/product_info.php/pName/usb-video-capture-device-for-mac-av-to-computer/

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tjp7154

2010-06-30 04:18:38 pm

Bananas GOOD, Kremlings BAD

More-but-not-too complex explanation,

Capture devices are analog-to-digital (A-D) converters.

They convert the video and audio (both separate) signals (electrical signals -- think radio) from the video and left/right audio signals from the jacks in front/back/side of the TV/device, and then convert those signals to a digital format (ones, zeroes, etc.) that the computer can understand.

In order to make those "ones and zeroes" the device has to SAMPLE the incoming data and then will output the digital version of what it sampled.

Now, the quality of the end result is mostly determined by the sample rate -- how OFTEN the capture device samples the incoming signal. You get a pixelated output if you don't sample the video/audio often (lower sample rate), and a cleaner, crisper image if you sample the video/audio very often (higher sample/bit rate).

The computer has to use memory and its processor to store all that data, and it's a lot of data if you want the crispest, high-resolution video/audio possible. The more data processed, the more memory/processor is needed.

Any questions?

More-but-not-too complex explanation,

Capture devices are analog-to-digital (A-D) converters.

They convert the video and audio (both separate) signals (electrical signals -- think radio) from the video and left/right audio signals from the jacks in front/back/side of the TV/device, and then convert those signals to a digital format (ones, zeroes, etc.) that the computer can understand.

In order to make those "ones and zeroes" the device has to SAMPLE the incoming data and then will output the digital version of what it sampled.

Now, the quality of the end result is mostly determined by the sample rate -- how OFTEN the capture device samples the incoming signal.  You get a pixelated output if you don't sample the video/audio often (lower sample rate), and a cleaner, crisper image if you sample the video/audio very often (higher sample/bit rate).

The computer has to use memory and its processor to store all that data, and it's a lot of data if you want the crispest, high-resolution video/audio possible.  The more data processed, the more memory/processor is needed.

Any questions?

arkarian:

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arkarian

2010-06-30 06:04:20 pm

mindfulness

fully erect

Quote from nate:

if not, do you want to test drive this thing for me? ;)

http://www.chinavasion.com/product_info.php/pName/usb-video-capture-device-for-mac-av-to-computer/

shame it can't do hd or else i would. really want to do some v.chron stuff asap.

tate:

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tate

2010-07-01 10:43:58 am

Quote from nate:

don't want to install windows in boot camp or vmware?

if not, do you want to test drive this thing for me? ;)

http://www.chinavasion.com/product_info.php/pName/usb-video-capture-device-for-mac-av-to-computer/

Actually have windows xp and 7 in vmware but my computer overheats too easily when using it in the summer with a vm and my warranty is expired :(. bootcamp would prob work but from the looks at how cheap the device is i might as well give it a go. Thanks.