720X480 VS 640X480 !

This forum is for video and audio help and discussion.

720X480 VS 640X480 !

Postby Myouh » Fri Feb 23, 2007 3:38 pm

what video resolution looks better on a computer, 720X480 or 640X480 ?
Myouh
 
Joined: 24 Dec 2006
Location: England

Postby BasharOfTheAges » Fri Feb 23, 2007 4:57 pm

That depends entirely on what the PAR and resolution of your source is.
Another Anime Convention AMV Contest Coordinator 2008-2014 & Head of the AAC Fan-works Theater - follow us on Twitter: https://twitter.com/#!/AACFanTheater
:sorcerer: :sorcerer: |RD: "Oh, Action!" (side-by-side) | |
User avatar
BasharOfTheAges
Just zis guy, you know?
 
Joined: 14 Sep 2004
Location: Merrimack, NH
Status: Extreeeeeeeeeme

Postby Niotex » Fri Feb 23, 2007 5:00 pm

1920x1080 looks the best 8-)
Image
User avatar
Niotex
The Phantom Canine
 
Joined: 08 Jun 2003
Location: Netherlands
Status: Simply Insane

Postby Corran » Fri Feb 23, 2007 5:48 pm

Myouh wrote:what video resolution looks better on a computer, 720X480 or 640X480 ?


For computer viewing:
using DVD footage with a 4:3 aspect ratio: 640x480
using DVD footage with a 16:9 aspect ratio: 640x352 (360 ideally but that isn't divisible by 16)
User avatar
Corran
 
Joined: 14 Oct 2002

Postby Willen » Sat Feb 24, 2007 5:36 am

Corran wrote:
Myouh wrote:what video resolution looks better on a computer, 720X480 or 640X480 ?


For computer viewing:
using DVD footage with a 4:3 aspect ratio: 640x480
using DVD footage with a 16:9 aspect ratio: 640x352 (360 ideally but that isn't divisible by 16)

x100

Other options for 16:9 footage:

848x480
768x432 <---- exactly 16:9!
720x400
704x400
Having trouble playing back videos? I recommend: Image
User avatar
Willen
Now in Hi-Def!
 
Joined: 10 Jul 2005
Location: SOS-Dan HQ
Status: Melancholy

Postby Zero1 » Sun Feb 25, 2007 5:01 am

What you do is resize to 640x360, then crop to 352; then it doesn't matter that 640x352 is not true 16:9 because you already rescaled your footage to the correct aspect ratio, just you cropped a little from the top and bottom.

The framesize/aspect ratio is pretty irrelevant, providing your footage is the correct aspect ratio.

Another thing would be to use a combination of codec/container that supports aspect ratio flags. MPEG-2 in MPG is most well known but a little big. MPEG-4 ASP (DivX/XviD) also supports aspect ratios, but what with AVI being outdated, whether they take effect or not is hit and miss, and dependant on the end users playback software (since AVI doesn't officially deal with aspect ratios, but some decoders may pick up the AR information from the video stream and act accordingly). If you use the command line XviD encoder and store it in MP4, that will work fine if you want XviD with aspect ratio. Another combination is H.264 in MP4 or even MKV. I didn't mention ASP in MKV, because AFAIK there are still bugs in it's native ASP support, but MP4 is fine with everything.

Doing the aspect ratio flag means you can keep it 720x480 and tell it to resize to 4:3, 16:9 or whatever on playback. This means that you don't waste bitrate encoding an over large image, and you don't get any nasty resizing artifacts such as ringing (AFAIK Windows tends to use a bilinear resizer).
User avatar
Zero1
 
Joined: 02 Jan 2004
Location: Sheffield, United Kingdom

Postby Athena » Mon Mar 05, 2007 6:01 pm

I wouldn't normally necropost, but this is relevant:

Is 768x432 divisible by 16 and therefore can be placed in h264 and MP4?
Image
User avatar
Athena
I ♥ the 80's
 
Joined: 02 Mar 2001
Location: Japan
Status: Sad Girl on Mac

Postby Kitsuner » Mon Mar 05, 2007 6:04 pm

Kionon wrote:I wouldn't normally necropost, but this is relevant:

Is 768x432 divisible by 16 and therefore can be placed in h264 and MP4?

Someone doesn't know how to work a calculator... :roll:
OtakuGray wrote:Sometimes anime can branch out to a younger audience and this is one of those times where you wish children would just go die.
Stirspeare wrote:<Stirspeare> Lopez: Vanquish my virginity and flood me with kit. ["Ladies..."]
User avatar
Kitsuner
Maximum Hotness
 
Joined: 16 Feb 2003
Location: Chicago, IL
Status: Top Breeder

Postby Athena » Mon Mar 05, 2007 6:07 pm

Kitsuner wrote:
Kionon wrote:I wouldn't normally necropost, but this is relevant:

Is 768x432 divisible by 16 and therefore can be placed in h264 and MP4?

Someone doesn't know how to work a calculator... :roll:


Nope. Numbers confuse me.

I'm a writer remember? I can't even add.
Image
User avatar
Athena
I ♥ the 80's
 
Joined: 02 Mar 2001
Location: Japan
Status: Sad Girl on Mac

Postby CrackTheSky » Mon Mar 05, 2007 6:38 pm

Kionon wrote:I wouldn't normally necropost, but this is relevant:

Is 768x432 divisible by 16 and therefore can be placed in h264 and MP4?


According to my calculator...yes.
User avatar
CrackTheSky
 
Joined: 27 Aug 2006
Location: Chicago
Status: Probably not editing.

Postby Willen » Tue Mar 06, 2007 8:36 am

768 x 432 is a magic number combination. They are exactly at the 16:9 ratio.

768 / 16 = 48
432 / 9 = 48

Therefore:

16 / 9 = 1.78 (1.777777777~)
768 / 432 = 1.78 (1.777777777~)

For mod16, the number must divide by 16 to a whole number (integer):

768 / 16 = 48
432 / 16 = 28
Having trouble playing back videos? I recommend: Image
User avatar
Willen
Now in Hi-Def!
 
Joined: 10 Jul 2005
Location: SOS-Dan HQ
Status: Melancholy

Postby NeoQuixotic » Fri Mar 09, 2007 1:32 am

I used 768x432 in my last video. However, I just did my first encode with MeGUI and was happy to find that aspect ratio flags worked perfectly. The MP4 played correctly in VLC, MPC, and WMP11 using ffdshow. MP4 is my new friend :D!
Insert clever text/image here.
User avatar
NeoQuixotic
Master Procrastinator
 
Joined: 01 May 2001
Location: St. Louis Park, MN
Status: I haz job!

Postby DJ_Izumi » Sat Mar 10, 2007 12:37 pm

Edit anamorphicly! >.<

720x480 with 4:3 flag checked in the container
720x480 with 16:9 checked in the container. :D
Image
User avatar
DJ_Izumi
 
Joined: 03 Oct 2001
Location: Canada

Postby AMV_4000 » Tue Mar 13, 2007 10:37 pm

540X360 FTW
User avatar
AMV_4000
 
Joined: 10 Apr 2002
Location: USA

Postby Brad » Wed Mar 14, 2007 2:50 am

I'm a big fan of 848x480. Mod16, doesn't change the vertical resolution, and only 5.333~ pixels difference from true 16:9.
Image
Ask Brad an After Effects Question! - Forum - Site
User avatar
Brad
 
Joined: 20 Dec 2000
Location: Chicago, IL

Next

Return to Video & Audio Help

Who is online

Users browsing this forum: No registered users and 3 guests

cron