Bluetooth video transfer

[massacres]

is there some way i can get a bluetooth adapter to send the video from my DV camcorder to my computer? How is it that i can use a printer via bluetooth but not my video camera?

I would appreciate any help or suggestions on this topic.

Thanx Massacrexz

[Richard_G]

From the Bluetooth standard:

Bluetooth uses gaussian frequency shift keying (GFSK) to modulate the data to frequencies around 2.4 GHz. The frequency spectrum is divided up into 79 channels spaced 1 MHz apart. Data is transmitted at 1 Mbps. For security benefits and noise reduction, a Bluetooth transmitter employs frequency hopping, switching channels up to 1600 times a second.

Dv is approx 30Mbps so you could send about one frame per second if you didn't have to take account of the protocol handshake and error correction. Not many people want to see only one frame per second.....

[ktnwin]

Your digital camcorder only support Ilink (or Firewire) to send video to a computer.
Why do you want to transfer via Bluetooth to start with ? wireless , is that what you want ?
As the previous answer already explain the reason for not using BlueTooth at all for video transfer, no one will design an adapter (to be connected to the DigCam) for this purpose.

[massacres]

I understand part of what you are saying (the technical aspect) but my DV records data nowhere near the size of 30 mbps, maybe 1-2 mbps..
according to your 30mbps stat, one minute of video would take 1800 meg?
an hour of video would be over 100 gig?

How can that be right?

I have clips 320x640 / 30 frames per second that are 45 minutes long that are only about 2.1 gigabytes..

let me make the question much simpler...

Is it only because of the transfer rate that Bluetooth cannot be used on video devices? And why not digital cameras?

Thanx for your input, massacres

[bugster]

I understand part of what you are saying (the technical aspect) but my DV records data nowhere near the size of 30 mbps, maybe 1-2 mbps..
according to your 30mbps stat, one minute of video would take 1800 meg?
an hour of video would be over 100 gig?

How can that be right?

I have clips 320x640 / 30 frames per second that are 45 minutes long that are only about 2.1 gigabytes..

let me make the question much simpler...

Is it only because of the transfer rate that Bluetooth cannot be used on video devices? And why not digital cameras?

Thanx for your input, massacres

How are you transferring video from your DV cam at the moment, because believe me, proper DV encode video is nearly 30Mps, so that is obviusly not what you have. It is also 720x576 (PAL) or 720x480 (NTSC).


Bluetooth can be used to transfer any data you want, as long as it is contained in some form of file wrapper. Your DV cannot provide that. Even if it could, the transfer rate would be far too slow to be acceptable.

FYI, an upcoming addition to bluetooth will support realtime video transfer. It must be H263 encoded, up to 30fps, but max resolution is about 352x288, so its no good for DV.

[massacres]

I am rerally just curious why we cannot create a truly wireless desktop, all peripherals wireless.. why are printers the only peripheral that this is marketed to.
(beside BT built in devices)

[massacres]

I am using firewire transfer at the moment and i have to admit that i might be transferring and decreasign the file size throught the transisiton process somehow..

But you answered my question and satified my curiousity, Thanx Very much...

[Richard_G]

EDIT: Bugster got in while I was typing this.....

You are confusing bits and bytes. The Bluetooth standard is 1 M bit per second, 8 bits = 1 byte. The DV standard is 30 M bits per second or approx 3.8 M bytes per second, around 13GB (Giga bytes) per hour. This is for full frame DV which is what your camcorder outputs over the Firewire (aka i-Link, IEEE1394) port. You may have video clips that are smaller than this, but they aren't DV but have been resized (to get down to 320 x 640) and further compressed with some other codec, that isn't how they came out of the camcorder.

If you were to try and send the DV data over a Bluetooth link, it would drop at least 29 frames for every 30 that it tried to send. You can't speed up the data transfer rate of the Bluetooth link and you can't slow down your camcorder to only send one frame at a time.

It can be done with digital cameras where you are only sending one frame and it can take as long as it takes. Most mobile phones with built in cameras can send the pictures over Bluetooth but only a very few of these have resolution better than 640 x 480. As digital cameras have got better, the image size (and hence the quality) has increased so Bluetooth is too slow again.

[massacres]

Thank you Richard...

A+ explanation..
I guess i will just live with my firewire.. for now..
Thank you very much, all of have been a big help..

On a different note, can you guys recommend a cheap, easy program to crop, modify and recompile my video files?

[waheed]

Ive been using Bluetooth to tansfer files from my PC to my mobile phone (mp3s and videos).

I must say, for data transfer, Bluetooth is slooooooow.

Stick with firewire.