Adobe Premiere: DV capture data rate and compression

[dg]

Hi,

Well if you are capturing trough DV format it's now compressed, so you will not see uncompressed Pal data rate unless you use a analog capturing device from a format like Beta, DigiBeta or some format like those, which are not compressed.

Using firewire Premiere will only let you capture using DV codecs like those mentioned above ;)


I hope this helps,
See ya!

[JamesMK]

Thanks for the info, diogo! I'll pass it along.
I honestly don't know if it helps, but I'm sure it sheds some light on the matter. Much appreciated! :thumbsup:

[dg]

You welcome mate :D

Happy New Year!!!

See ya!

[Hugh]

DV is always (I believe) compressed down to 3.6Mb/sec...

[DenialK]

Thanks for the info, the existance of standard DV compression sort of became clear to me during "the night from hell" (which it from now on shall be known as, for all eternity).

I am the brother, btw.

Thanks again :)

[Hugh]

Glad you got it all sorted...

Sorry for my rather abrupt post before - I suddenly realised that I really had to leave to get to work.....

There are various different wrappers for DV (hence the Microsoft DV that Premiere uses - Avid wraps it as an OMFI, etc) - but I believe the internal compression is the same all over - this is cos it is pretty much just copying the data off the DV tape


I'm now gonna wait for someone to correct me on that and say that it is actually recompressing....

[jussing]

Originally posted by Hugh
I'm now gonna wait for someone to correct me on that and say that it is actually recompressing....
No, I think you're right, DV should be DV regardless of wrapper, and there should be no quality loss no matter what wrapper you grab to. :) The only difference there can be between DV and DV is, as far as I know, PAL and NTSC.

Cheers,
- Jonas

[JamesMK]

Originally posted by jussing
- - - and there should be no quality loss no matter what wrapper you grab to - - -
That sounds very reassuring anyways. Thanks for all your input.

[alphatron]

The Microsoft DV codec is actually not very good. It shows generation loss when recompressed, and the overall quality is not as good as other DV codecs. If you have access to Premiere Pro, I would use that, as it uses the Main Concept DV codec, one of the best. There is also a hack to use the Main Concept in Prem 6.5.

[jussing]

Oh well, that's news to me. I've never heard that before (so sorry if I mislead you, JamesMK), but it is very interesting.

-Alphatron, do you know where I can see a more thorough documentation of the differences between DV codecs? -Cause I've always believed they were the same.

Cheers,
- Jonas

[alphatron]

Hey jussing,

I'll dig up a couple articles today showing the quality variation and generation loss. By no means are all DV codecs created equal.

[jussing]

Thanks! :thumbsup:

[fr3drik]

Originally posted by alphatron
Hey jussing,

I'll dig up a couple articles today showing the quality variation and generation loss. By no means are all DV codecs created equal.
I'd be very interested in the results! :)

[kiri]

alphatron: are you sure about premiere pro using main concept codecs for DV export?
i just opened premiere then and tried to find a way to do it, but all i could export to as DV PAL was the microsoft codec~

ive also found that the microsoft codec can cause some problems when trying to compress/convert the avi file in programs like CCE (gives an error).


Oh, also, does anyone know about the check box in premiere that says "recompress" and "maintain datarate" when exporting in DV?
ie, does that reduce the quality?

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