Digital Video Capture via Firewire - Byte Errors!

[Guest]

Archived from groups: rec.video.desktop (More info?)

I have got the following equipment:

digital video camcorder (Sony, DCR-PC120E),
1.8m Firewire cabel,
mainbord with Firewire onboard (Gigabyte, GA-7NNXP),
Windows XP Professional with latest updates and device drivers,
Sony Vegas Video 4.0e.

If I capture the video twice and do a binary compare of the two files,
I got some byte differences. These differences are randomly
distributed over the file and are in the order of 0.1% of the
filesize.

Any suggestions how to guarantee an error free video capture?

Frank

 

[Guest]

Archived from groups: rec.video.desktop (More info?)

Frank Giebeler wrote:
> I have got the following equipment:
>
> digital video camcorder (Sony, DCR-PC120E),
> 1.8m Firewire cabel,
> mainbord with Firewire onboard (Gigabyte, GA-7NNXP),
> Windows XP Professional with latest updates and device drivers,
> Sony Vegas Video 4.0e.
>
> If I capture the video twice and do a binary compare of the two files,
> I got some byte differences. These differences are randomly
> distributed over the file and are in the order of 0.1% of the
> filesize.
>
> Any suggestions how to guarantee an error free video capture?
>
> Frank
Frank!

I would like to repeat the same experiment here...
What software do you use to compare the files?

Are there any *visible* differences (on the decompressed frames)?

Johan Stäck
Skellefteå
Sweden

 

[Guest]

Archived from groups: rec.video.desktop (More info?)

> Frank!
>
> I would like to repeat the same experiment here...
> What software do you use to compare the files?
>
> Are there any *visible* differences (on the decompressed frames)?
>
> Johan Stäck
> Skellefteå
> Sweden

Johan,

I used windiff to compare the files. Also fc with binary compare shows
the differences.

By the way. I got no dropped frames!

Wether there are any visible differences or not doesn't matter because
digital capture should make a 1:1 copy of the tape. And it takes to
much time to compare the files frame by frame.

Frank

 

[Guest]

Archived from groups: rec.video.desktop (More info?)

But which data is different? Is it pixel data, frame data? Sync data? Make
sure first it is not error correction of some sort.

I have never done a binary compare of two of the same captures. That's an
interesting test.

I would also try it with a plug-in Firewire card rather than the one on the
motherboard.



"Johan Stäck" <johan@stack.se> wrote in message
news:c6o4u8$ds84a$1@ID-50478.news.uni-berlin.de...
> Frank Giebeler wrote:
> > I have got the following equipment:
> >
> > digital video camcorder (Sony, DCR-PC120E),
> > 1.8m Firewire cabel,
> > mainbord with Firewire onboard (Gigabyte, GA-7NNXP),
> > Windows XP Professional with latest updates and device drivers,
> > Sony Vegas Video 4.0e.
> >
> > If I capture the video twice and do a binary compare of the two files,
> > I got some byte differences. These differences are randomly
> > distributed over the file and are in the order of 0.1% of the
> > filesize.
> >
> > Any suggestions how to guarantee an error free video capture?
> >
> > Frank
> Frank!
>
> I would like to repeat the same experiment here...
> What software do you use to compare the files?
>
> Are there any *visible* differences (on the decompressed frames)?
>
> Johan Stäck
> Skellefteå
> Sweden