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Konverter von Firewire auf WLAN

Converter of Firewire on WLAN



Frage von Noy:
Juli 2006

Hello,
anyone knows of a converter firewire signals are of a camera directly via Wi-Fi available, or write to a disk via wireless sharing (via Samba or FTP) can?
Of course, with battery supply so that the thing can be used directly with the camera together.
One can, of course, to use a laptop in a backpack with the cameraman carries around, but since the battery is probably a pretty fast empty ...
Has anyone else an idea?
A standard WLAN with 54Mbps provision should still be sufficient, right?

Gruss,
Jonny



Antwort von mecs:

No, because it is where I know no converter.
DV video has a real bit rate of 36 Mbit / s, although one case of WLAN (802.11g), although still a bit rate of 54Mbit / s indicating they are in reality only ~ 50% of them, that is ~ 27Mbit / s. The rest is for error correction, etc. on it. So this can not work like that.
The only way that I would think there would be a professional video-radio link, and I do not know much about it really.
Why are you taking on not just on tape?



Antwort von Markus:

"mecs" wrote:
DV - video has a real bit rate of ...

... 25 Mbit / s.








Antwort von mecs:

25 Mbit / s is the pure video content. To get 1.5 Mbps for audio and ~ 8.7 Mb / s for error correction, etc.



Antwort von Noy:

"mecs" wrote:

The only way that I would think there would be a professional video-radio link, and I do not know much about it really.


Währe Probably the most sensible, but the equipment is likely to be synonymous relatively expensive ... well, ok, if the whole laptop via wireless and even tinkering, it is synonymous not just cheap ...

"mecs" wrote:

Why are you taking on not just on tape?


I imagine it so easy to practice.
Cameraman takes on the take, a moment later he can be on one (another) laptop anschaun again and decide whether what is good or not (jaaa, ok, dafür gibts actually the preview screen ...) if no one can delete it immediately and take the next take, if indeed it can be immediately add to the rough cut ...
That is to say, if you have to leave the location you have already finished the rough cut (of course only for small projects, you can turn off s.einem piece ;-)...

"mecs" wrote:

25 Mbit / s is the pure video content. To get 1.5 Mbps for audio and ~ 8.7 Mb / s for error correction, etc.


Ok, then you would have it also with the "new" proprietary 108Mbps WiFi versions do ... Then, of course, should not interfere with the radio quality so you have no dropouts ...

I am grateful for every suggestion and criticism!



Antwort von frywa:

Hello,

Perhaps it would go with a Focus F4 Harddiscrecorder 40 GB.
Is very small and handy.
I could sell a thing.

Yours sincerely,
frywa



Antwort von Noy:

Hello frywa,
because one would have to still like plug the hard drive constantly between a digital camera and laptop out and her.
In some way this is what I want so synonymous nothing more than an extended hard disk recording ...

Do you have a link to a product description for the "Focus F4 Harddiscrecorder" on google I could find nothing



Antwort von frywa:

Hello,
Go to www.como.com
Search Focus where SF 4

MfG frywa



Antwort von camworks:

"mecs" wrote:
25 Mbit / s is the pure video content. To get 1.5 Mbps for audio and ~ 8.7 Mb / s for error correction, etc.


if we want to be very exact, then synonymous correct.
The output data rate of dv is 125Mbit / s, which is on by DCT
25Mbit / s compressed.
to get protection errors, additional-and audio data, so that the recorded data rate around 42mbit / s..

source: "professional video technique" of u.schmidt, 2 edition, page 401
http://www.amazon.de/gp/product/3540242066/302-7739732-7819209



Antwort von hannes:

Your main problem lies in B + b, bits and bytes. 1 byte has bit 8th

If now we take the general doctrine of 4:2:0 miniDV, then
Y = 414,720 bytes, U = 103,680 bytes, V = 103,680 bytes
= 622,080 B / F x 25 Frame = 15,552,000 B / sec

Now, the DCT compression with 5:1 comes into play:
15.5: 5 = 3.11 Mb + 2 x uncompressed sound makes 3.6 MBs. (Mega-byte-per-sec)
The involvement of start and stop bits, it is easy s.35Mbs (mega-bits-per-sec)

Bit more than a few more or less let us not fight well, right?
Rather, the sloppiness in dealing with our language is probably once again responsible for the confusion.
B is now time not b! At least not in technology.

In any case where the shift button is stuck with Cola, perhaps (;-))



Antwort von camworks:

You did not take into account the audio data (and the additional information data), hannes.

And we have not b, but always bit mbit or written, that is was not a misunderstanding.




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