is there any Difference between dv quality ?

[bashvideo]

hi , this is mohammed bash from kuwait .


please ,

is there any Difference between dv quality ? or the dv is standard for all company ?

for example , if i use fire wire with canopus , pinnacle , avid , matrox , should i have the same quality ?

thanks for all .

[pjsssss]

There used to be a difference, but I think now most are the same or very little difference. Canopus/GV has always been one of the very best.

[STORMDAVE]

Pat is right...matter of fact, Avid used to use the Canopus DV codec, then they used their own.

[bashvideo]

i have a friend told me that he try capture by fire wire one time with avid express and second time with edius on the same system .

he told the picture for avid express much better than edius .

is that true ???

i think the dv is standard for all companies . but i want to be sure about this information .

thanks for all .

[STORMDAVE]

No that is not true. First generation DV files are replicas from your DV tape. Quality loss comes into play when you re-render the same DV file with a DV codec, and Canopus DV was always the best one out of the bunch.

[GrassValley_BH]

To add to STORMDAVE's comment...

There are two places quality can be lost when working with DV and rendering DV:

1. Flawed DV decoding can introduce artifacts
2. Poor DV encoding can also introduce artifacts

[Julian]

What is the difference between DV AVI and DV Stream in Edius?

Thanks

[STORMDAVE]

DV AVI just wraps DV data under the AVI extension, AND you can either use the Canopus DV codec or check the "Use Microsoft DV codec" and it will use the standard MSDV codec.

DV Stream just creates a .dv file without any wrappers. Use the former.

What we need to know is what are you going to do with your DV files? If you're using Edius, just capture as you always did. If you're going between Premiere Pro and Edius etc, use MSDV.

[vienna1944er]

First generation DV files are replicas from your DV tape.
Quality loss comes into play when you re-render the same DV file with a DV codec, and Canopus DV was always the best one out of the bunch.

what I guessing to know:
a) PAL DV on the tape s always 4:2:0 \ 25Mbit/sec
b) Canopus DV codec is 4:2:2
c) DV-Standard enforces by "print to tape" 4:2:0 [from whatever timeline- codec is activated ( i.e. 4:2:2)]

Question's about what I [unfortunately] not know exactly:
PAL-DV tape >> captured with Edius (Output format:DV50i; Rendering Format: DV AVI)
created the media-file in the ".avi wrapper" on the disk..... and this file have the specification
1) the same as DV tape-source = 4:2:0 ??
2) Canopus-DV avi = 4:2:2 ??

Question about Export >> Print to File >> DV AVI (ExporterPlugIn of DV compressed AVI file)
3) with aktivated button "Use MSDV codec" >> up as 4:2:0 ??
4) without activated button "Use MSDV codec" >> end up as CanopusDV with 4:2:2 ??

Question about Export per PCE >> Video Editing Format >>
5) with setting: CanopusDV AVI >> end up as 4:2:2 ??
6) with setting: MS-DV Avi >> end up as 4:2:0 ??

friendly asking greetings from europe\austria\vienna ....old Hans

[GrassValley_BH]

The Canopus DV codec is 4:1:1 for NTSC, and 4:2:0 for PAL. Otherwise it wouldn't be DV-spec-legal.

EDIUS's internal processing is 4:2:2 or better (depends on what it's doing).

[vienna1944er]

Thanks for clarify about the "4:2:0 detail"..........

I understood you correct with >> the difference between print to file with
a) aktivated button "Use MSDV codec" or b) without activated button "Use MSDV codec"
is only the better written algorithms from "CanopusDV codec" or is there still other things aviable ??

i.e. 0-250 compare 16-235 ...or is this likewise ditto only >EDIUS's internal <

old Hans

[GrassValley_BH]

Unless things have changed, the checkbox only determines what Four-CC code is written to the AVI file. The Canopus DV codec is still used to produce the DV stream either way.

If the "Use MSDV" checkbox is not checked, then the Canopus DV codec produces a DV stream that is put into an AVI file marked as CDVC (Canopus DV codec Four-CC).

If the "Use MSDV" checkbox is checked, then the Canopus DV codec produces a DV stream that is put into an AVI file marked as DVSD (Microsoft DV codec Four-CC).

This is similar to how you can get the same LCD monitor electronics branded as a HP monitor, a BenQ monitor, etc.

[Aristotelis]

This is very usefull info BH...Thanks...
I have one question though
Does the use of Canopus software DV codec has anything to do with DV editing hardware acceleration that boards like DVStorm, DVX provide?

[GrassValley_MD]

This is very usefull info BH...Thanks...
I have one question though
Does the use of Canopus software DV codec has anything to do with DV editing hardware acceleration that boards like DVStorm, DVX provide?

Actually those boards are not acceleration boards. They are really for I/O only.

The slight power boost from having the overlay and the real time output are so small now that they don't any noticeable difference.

You will not see a difference in the editing speed of the MS wrapped DV and the Canopus DV.



Mike

[GrassValley_KH]

EDIUS NX, EDIUS SP, EDIUS DVX (aka DVStorm XA Plus), and DVStorm(2(Pro)) all feature a hardware Canopus DV codec chip - its purpose is to generate a DV/DVCAM output stream on-the-fly from the timeline, and alleviate the CPU (which is how OHCI systems work).

It's a bit different than the software DV codec, which is used to read from/write to files to a disk.