newbie capture/conversion question

[Guest]

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

I have some video clips at 640 * 480 (captured from laser disc by
VirtualDub) that I wish to convert to DVD-compliant MPEG-2 in TMPGEnc
(at 720 x 480). But I'm confused about which setting to use under the
TMPGEnc "Video Arrange Method."

Should I select "Full Screen" or would that make my clips appear squashed?
If so, would "Full Screen (Keep Aspect Ratio)" prevent it? And what's the
difference between "Keep Aspect Ratio" and "Keep Aspect Ratio 2?"

Thanks to anyone who can shed a little light.

 

[Guest]

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

Dennis Wilson <dennisqwilson@yahoo.com> wrote:
: I have some video clips at 640 * 480 (captured from laser disc by
: VirtualDub) that I wish to convert to DVD-compliant MPEG-2 in TMPGEnc
: (at 720 x 480). But I'm confused about which setting to use under the
: TMPGEnc "Video Arrange Method."

: Should I select "Full Screen" or would that make my clips appear squashed?
: If so, would "Full Screen (Keep Aspect Ratio)" prevent it? And what's the
: difference between "Keep Aspect Ratio" and "Keep Aspect Ratio 2?"

: Thanks to anyone who can shed a little light.

You first need to resize the clip to one of the following:
720x480
704x480
352x480

I'd probably go for 704x480 or 352x480. You don't need extra 16 bit.
You should do it in VirtualDub or with AVISynth. I recommend latter. Then I'd
feed this to TMPGenc and choose the same resolution in TMPGenc as you resized
it to. For video arrange method I usually choose Center(Keep Aspect Ratio),
but if the input clip matches output clip, it doesn't really matter. I also
recommend clipping the unwanted parts (espeically right and bottom) in TMPGenc
keeping the resolution. This will allow you to use bit rate more towards the
active picture.

-Leonid

 

[Guest]

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

Leonid Makarovsky <venom@cs.bu.edu> wrote in
news:cmasa9$ehi$1@news3.bu.edu:

> Dennis Wilson <dennisqwilson@yahoo.com> wrote:
>: I have some video clips at 640 * 480 (captured from laser disc by
>: VirtualDub) that I wish to convert to DVD-compliant MPEG-2 in TMPGEnc
>: (at 720 x 480). But I'm confused about which setting to use under
>: the TMPGEnc "Video Arrange Method."
>
>: Should I select "Full Screen" or would that make my clips appear
>: squashed? If so, would "Full Screen (Keep Aspect Ratio)" prevent it?
>: And what's the difference between "Keep Aspect Ratio" and "Keep
>: Aspect Ratio 2?"
>
>: Thanks to anyone who can shed a little light.
>
> You first need to resize the clip to one of the following:
> 720x480
> 704x480
> 352x480
>
> I'd probably go for 704x480 or 352x480. You don't need extra 16 bit.
> You should do it in VirtualDub or with AVISynth. I recommend latter.
> Then I'd feed this to TMPGenc and choose the same resolution in
> TMPGenc as you resized it to. For video arrange method I usually
> choose Center(Keep Aspect Ratio), but if the input clip matches output
> clip, it doesn't really matter. I also recommend clipping the unwanted
> parts (espeically right and bottom) in TMPGenc keeping the resolution.
> This will allow you to use bit rate more towards the active picture.
>
> -Leonid
>

Yes, but doesn't resizing it from 640 to 704 or 720 cause the image to
appear stretched on playback? This is the part I don't understand.

 

[Guest]

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

Dennis Wilson <dennisqwilson@yahoo.com> wrote:
: Yes, but doesn't resizing it from 640 to 704 or 720 cause the image to
: appear stretched on playback? This is the part I don't understand.

640x480 is 4:3. Capturing directly into 704x480 or 720x480 from analog 4:3
source should give pretty much the same effect as capturing at 640x480 and then
upsizing it to either format mentioned above. The DVD NTSC format is 720x480,
704x480 and 352x480 which are not 4:3. On DVD playback it will resize back to
correct aspect ratio.

Why are your files 640x480? Are you capturing at MJPEG?

--Leonid

 

[Guest]

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

Leonid Makarovsky <venom@cs.bu.edu> wrote in
news:cmbibp$q4c$1@news3.bu.edu:

> The DVD NTSC format is 720x480, 704x480 and 352x480 which are not 4:3.
> On DVD playback it will resize back to correct aspect ratio.

So if I encode my 640x480 AVI into a 720x480 MPEG2 and author it to DVD,
it'll play back in the correct aspect ratio?

> Why are your files 640x480? Are you capturing at MJPEG?
>
> --Leonid

Don't know why they're 640x480, but I'm capturing with VirtualDub, using
HuffYUV. If I TRY to capture at 720x480, I get a 640x480 image with an
80-pixel black bar on both sides of the thing.

 

[Guest]

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

Dennis Wilson <dennisqwilson@yahoo.com> wrote:
: So if I encode my 640x480 AVI into a 720x480 MPEG2 and author it to DVD,
: it'll play back in the correct aspect ratio?

I'd go with 704x480 or even 352x480 (half D1).

: Don't know why they're 640x480, but I'm capturing with VirtualDub, using
: HuffYUV.

Ok, good.


: If I TRY to capture at 720x480, I get a 640x480 image with an
: 80-pixel black bar on both sides of the thing.

That's good. This how video is sent. What capture card are you using?

--Leonid

 

[Guest]

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

On 3 Nov 2004 15:08:57 GMT, Leonid Makarovsky <venom@cs.bu.edu> wrote:

>You first need to resize the clip to one of the following:
>720x480
>704x480
>352x480
>
>I'd probably go for 704x480 or 352x480. You don't need extra 16 bit.
>You should do it in VirtualDub or with AVISynth. I recommend latter. Then I'd
>feed this to TMPGenc

You can do this without the need to make an intermediate Avi, as
Tmgpenc shall read directly the Avisynth script.

 

[Guest]

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

Leonid Makarovsky <venom@cs.bu.edu> wrote in
news:cmbph3$d9h$1@news3.bu.edu:

> Dennis Wilson <dennisqwilson@yahoo.com> wrote:
>: So if I encode my 640x480 AVI into a 720x480 MPEG2 and author it to
>: DVD, it'll play back in the correct aspect ratio?
>
> I'd go with 704x480 or even 352x480 (half D1).
>
>: Don't know why they're 640x480, but I'm capturing with VirtualDub,
>: using HuffYUV.
>
> Ok, good.
>
>
>: If I TRY to capture at 720x480, I get a 640x480 image with an
>: 80-pixel black bar on both sides of the thing.
>
> That's good. This how video is sent. What capture card are you using?
>
> --Leonid

All-in-Wonder Radeon 9000.

 

[Guest]

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

Dennis Wilson <dennisqwilson@yahoo.com> wrote:
: All-in-Wonder Radeon 9000.

I don't know what chip they're using, but this card might not support overscan.
Regardless 704x480 is your best bet. Don't go 720x480. You don't need that.

Regards.

--Leonid

 

[Guest]

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

Leonid Makarovsky <venom@cs.bu.edu> wrote in
news:cmdi9v$1vu$1@news3.bu.edu:

> Dennis Wilson <dennisqwilson@yahoo.com> wrote:
>: All-in-Wonder Radeon 9000.
>
> I don't know what chip they're using, but this card might not support
> overscan. Regardless 704x480 is your best bet. Don't go 720x480. You
> don't need that.
>
> Regards.
>
> --Leonid

Thanks, Leonid. My only remaining question is, will resizing my 640x480
clip to 704x480 cause it to appear stretched on playback?

 

[Guest]

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

Dennis Wilson <dennisqwilson@yahoo.com> wrote:
: Thanks, Leonid. My only remaining question is, will resizing my 640x480
: clip to 704x480 cause it to appear stretched on playback?

The best way to do it is to load AVISynth (http://www.avisynth.org/),
and have the basic test file that looks like:

AVISource("TheFilenameOfYourAVI.avi")
LanczosResize(704, 480)

Save this file as say video.avs

Then open a TMPGenc DVD template. Make sure you change the resolution from
720x480 to 704x480 on the 1st page. Then on the second page make sure to select
aspect ratio 4:3. Load this video.avs into TMPGenc. I also recommend clipping
the movie leaving resolution untouched.

--Leonid