Here's another 4mb Mpeg demoing the Marvel G400!

[Elie]

Hi Guys,

This is a 28 second 4mb mpeg showing again colour and clarity.

The file is called Marvel G400 demo 2.mpg
I took that video in downtown Manhattan NYC.
Again shot with the XL1 with no filters on.

Enjoy.

here's the link http://216.15.144.49/Marvel%20G400%20demo%202.mpg
Regards,
Elie

[This message has been edited by Elie (edited 21 October 1999).]

[wkulecz]

Image quality looks pretty good to me.

Unfortunately it seems the G400 Marvel still has the same problem as the G200 Marvel with trandcoded video shifted down and right leaving a black border on the top and left. Perhaps a few pixels narrower than I get with my G200 Marvel or did you trim the clip?

Bummer Matrox still hasn't fixed this :-(

--wally.

[Elie]

No I did not trim the clip

The boarder is because I originally captured at 704x480 so when I created the mpeg clip the boarders appeared because of the resolution change.
The change was done from 704x480 to 320x240
you do the math

Regards,
Elie

[This message has been edited by Elie (edited 21 October 1999).]

[sweeper]

Hi Elie,

I like the quality of your clip. Even when enlarged twice, it still looks very good. What I also noticed was that picture became substantially sharper, when you slowed down your "sweeping". It is clearly seen on the big faces "Mega Zoom" in the beginning. As I need to make a video of a stage with a guy walking back and forth, I want to ask you what kind of codec did you use?
Actually, I will appreciate to know the whole procedure you used. As I understand, you capture MJPEG at full resolution and max quality, with ~6:1 compression. Then, you bring it to, say, Media Studio and set Field B, deinterlaced. Afterwards, you save the video as frames with lower resolution, and then you use a codec to make this mpeg file.
Am I right? Did I miss something?
Thank you in advance.

[Elie]

Hi,

Your right all the way up to the point were I captured at full res 704x480 6.6:1 30fps.

But I created the avi in frame based mode not Field order B deinterlaced.
Then I brought the clip back into Ulead and did a create video file chose the mpeg format 200kbps 29.97 fps frame based 320x240 res.

At this point Ulead did not give me a choice to use mpeg 4 or mpeg 1 so I asumed it's using mpeg 1 by default.

Regards,
Elie

[wkulecz]

Please do the math for me.

I must be too stupid to see how 704x480
when resized to 320x240 forces black borders on the top and left edges.

I can keep the entire processing chain the same except for input codec. A 704x480 DMB1 (marvel) codec converted to 352x240 leaves a black border on the top and left edges of any AVI or MPEG independent of AVI (non-DMB1) codec or if I use Xing or Ligos for MPEG.

Copying an ATI captured 640x480 (VCR2 codec)
clip to my system (after installing VCR2 codec) and producing a 352x240 Indeo or MPEG
I don't get the black bars on the top and left edges.

I'm not saying the ATI capture is better cause it clearly is not, but the Matrox codec introduces a defect. I'm dissappointed it's not fixed in the G400 Marvel.

If it doesn't bother you fine, but it bothers me greatly.

--wally.