Problem with vegas capturing video from DVX

[Jeff Donald]

They almost all have their own codecs. They are used for render and playback, but not transfer from camera to deck or camera to NLE.

[Miguel Lopez]

please, read my last post.

How do you explain the difference in color in fcp and avid dv express?

[Jeff Donald]

Your link to the Avid and FCP comparisons has a link to Adam Wilt's page for an explanation. Read his explanation on exporting images from FCP (difference in screen gamma of 1.8 and 2.2).

[Miguel Lopez]

Well, maybe i am wrong in all that i said, but this thing is the truth:

- when i capture dv video in ulead video editor and then back to the camera, a red car appear soften and not as good as the original one recored. If there was no quality loss in the capturing, where was it? (the video was not touch in any way).

- the same now with vegas and my dvx100

explain me something, please or i will get finally mad.-

[Jeff Donald]

If you're talking about the screen capture, we are back to Don's comments and I agree. The red seems to be showing the interlacing artifacts. Try using progressive, you might be happier. Progressive is one of the big advantages of that camera. Is there a reason not use it?

[Miguel Lopez]

arrrggg, do you think i am stupid??

the sample i gave you is shot in 25p, it is set as progressive video in vegas, and for some reason the project was in interlaced. But that gives no difference at all. if you want i give you the same capture frame with progressive video in the project settings.

It is NOT a problem of setting. It is a problem of the CAPTURING!!!!!!!

as i write before, i have a lot of similar videos shot with canon xl1, and sony vx2000 which look exactly the same. Red cars that show artifacts.

Again it is a problem of capturing. You see the video rigth in the screen. you capture it. And upload again to the camera, and that´s it. The red borders are soften.

[Jeff Donald]

If you look at your footage on something other than a computer monitor, what do you see?

[Miguel Lopez]

here you are now: www.bachibuzuc.com/vegasproblem2.tif

shot with dvx100 at 25p
captured in vegas4
set as progressive video
set as progressive project

[Miguel Lopez]

i see the footage in a tv monitor conected to the camera. when watching the original video it looks ok, when looking at the video that is being output from the PC to the camera and then to the monitor the red saturated t-shirts or cars appear slightly compressed, soften, as a jpg.

[Jeff Donald]

That link returns an error.

[Miguel Lopez]

try again, i edited the post because there was an error. ;-))

[Don Donatello]

what you are seeing are the differences between the different codec's ...

the data goes from tape to HD ... now if you use Vegas it will play back that data using SOFO codec.

if you use avid to play back the file it will use avid's dv codec

if you use ulleads media studio i think it uses the microsoft Dv codec

if you use premiere and you have a canopus board then it will use canopus DV codec to play back the data

if you have premiere set up as OHCI then it will use the microsoft dv codec to play back the data - there are ways to tell it to use different codec's

if you are on a PC and you just click on a dv avi file then your computer will use windows media player and the microsoft dv codec to play back the file

if on a mac and you click on the same file it will use QT dv codec to play it back

you are correct that you do see different shades of REDS with each codec ...

again data is just transferred from tape to hard drive .. a PC will put a header that says this clip is a dv .avi .... if on a MAC then it will put a header that says this is a DV.MOV clip ..same data just different headers ...

[Miguel Lopez]

Here is even more test:

- canon xl1 either at interlaced or progressive to pc with pinacle dv studio plus and using ulead video editor: artifacts

- sony vx2000 interlaced to desktop computer using vegas 4: artifacts

- dvx100 at 25p to this computer using vegas4: artifacts

- dvx100 at 25p in a similar computer using avid dv express 3.5: less artifacts, but still some.

This artifacts only appear in zones with very saturated colors and smooth surfaces as i said, cars and t-shirts for example.

It is the dv codec wich losses quality. why?

[Jeff Donald]

You are seeing the different codecs in use, because you are outputting the data to your PAL monitor or your computer screen. In some software the computer image is not full resolution, I don't know about Vegas.

[Miguel Lopez]

what do you mean? i did not undersant your explanation. thanks