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-   -   Mpeg to avi resizing method? (http://www.digitalfaq.com/archives/encode/7455-mpeg-avi-resizing.html)

bigggt 01-01-2004 05:30 PM

Mpeg to avi resizing method?
 
I know this is not the best way to do it but i have music videos and instead of using directshowsource(haven't had any luck so far)i used the Huffyuv lossless codec to make the avi.

The i use the v4 script and when i play everything on the computer it is perfect(the avi and the final mpeg).But when i watch it on the tv it isin't correct because when the name of the video comes up i can't see all the printing on the screen,it cuts off a bit of the video.

Does anyone know how i correct this

thanx

Dialhot 01-01-2004 05:43 PM

Re: Mpeg to avi resizing question
 
Quote:

Originally Posted by bigggt
Does anyone know how i correct this

You should use a bigger overscan.

Which value of overscan are you usign currently ?

bigggt 01-01-2004 06:07 PM

thanx Phil
This is exactly what i am using

Code:

GripCrop(352, 240, source_anamorphic=false)
i didn't know i was to use overscan :oops:

edit-I just checked the optimal scripts and see that it is there(when i copied it mine don't have it :? )

Is 1 ok for this resolution

Dialhot 01-01-2004 06:21 PM

Quote:

Originally Posted by bigggt
Is 1 ok for this resolution

It's the only value for this resolution. You can go to 2 (or 3) only with bigger pictures.

rds_correia 01-02-2004 10:23 AM

Quote:

Originally Posted by Dialhot
Quote:

Originally Posted by bigggt
Is 1 ok for this resolution

It's the only value for this resolution. You can go to 2 (or 3) only with bigger pictures.

If I understood it right there is a formula that tell you which overscan to use with the resolution you are encoding, right :?:
And it doesn't have anything to do on how big the tv screen is, right :?:
Could you elaborate a bit more on that Phil?
Also is there any difference if we are encoding in anamorphic mode?
Thnx

incredible 01-02-2004 10:28 AM

As a 352x288(240) video will be stretched 2times in its width and height, the borders also will be stretched that much :arrow: thats the logic.

So we could recommend:

352x288(240) = Overscan 1
352x576(480) = Overscan = 1 (cause of still half width)

480x576(480) = Overscan = 2

704(720)x576(480) = Overscan = 2 (and if your TV gots a big overscan you even can try Overscan 3

But these values all depend on the specs of your Tv set!
In some cases i.e. you also can use a Overscan =3 at 480x576 ... If your Tv set gots a big overscan /movie cropping

Dialhot 01-02-2004 10:30 AM

Quote:

Originally Posted by rds_correia
Also is there any difference if we are encoding in anamorphic mode?
Thnx

No there is not.

incredible 01-02-2004 10:34 AM

In anamorphic mode watching on a 4:3 tv there only will be the height squeezed, so Dialhot is right .. you can use the same Overscan.

But when watching on a 16:9 Tv set, where the 720 width will be stretched to its non-anamorph condition the result will be 1024x576(480) and so in this case you should try what max overscan will not be recognised as black borders on the sides.

rds_correia 01-02-2004 10:45 AM

Thanks a lot guys.
You are always there when we need you :D


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