FORUMS: list search recent posts

converting ntsc .mov to halfsize .flv for the web

COW Forums : Web Design

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Harvola
converting ntsc .mov to halfsize .flv for the web
on Jul 16, 2006 at 3:37:25 pm

greetings. i'm an old school motion graphics designer trying to keep up.

i want to use AFX to prep my show reel files for the web.

my web builder is going to convert whatever i give him to .flv
he says just make them the pixel size i want with lossless compression,
and he'll convert them.

my originals are NTSC DV 720x480 .mov - with stereo audio at 41.100

a friend recommended shrinking them to iPod video size 320x240,
but that is a mathematic reduction of a DV Square Pixel size 720x540.

(i've read the CC tutorial on square pixels but it didn't really tell me
what i should do in this case)

should i render my new smaller size comps in SQUARE PIXELS ?
should i just reduce to half size (360x240) or should i force-fit to 320x240
or should i crop slightly to 320x240 ?

should i consider field or non-field render ?
should i reduce the audio to mono to save bandwidth ?

another friend recommends Sorenson Squeeze but i am comfortable in AFX.




Return to posts index

Bret Williams
Re: converting ntsc .mov to halfsize .flv for the web
on Jul 16, 2006 at 9:06:11 pm

[Harvola] "greetings. i'm an old school motion graphics designer trying to keep up.

i want to use AFX to prep my show reel files for the web.

my web builder is going to convert whatever i give him to .flv
he says just make them the pixel size i want with lossless compression,
and he'll convert them.

my originals are NTSC DV 720x480 .mov - with stereo audio at 41.100

a friend recommended shrinking them to iPod video size 320x240,
but that is a mathematic reduction of a DV Square Pixel size 720x540.

(i've read the CC tutorial on square pixels but it didn't really tell me
what i should do in this case)

should i render my new smaller size comps in SQUARE PIXELS ?
should i just reduce to half size (360x240) or should i force-fit to 320x240
or should i crop slightly to 320x240 ?

should i consider field or non-field render ?
should i reduce the audio to mono to save bandwidth ?

another friend recommends Sorenson Squeeze but i am comfortable in AFX."


Your friend is right. Render your comp to 320x240. Which if you know your math is the same as 4:3, which IS the same as non-square 720x480, or square 720x534. 720x480 is NON-SQUARE pixels, which can only be shown properly by a television, not computers. Computers only deal with square pixels. So yes, force fit your 720x480 to 320x240. Do not field render as computers don't play back fields and it will look like mush. I personally think the best way to save bandwidth is to reduce to 15fps AND make it mono. Keep it 16 bit but you can reduce to 22khz or 32khz.

320x240 is actually 1/4 the size, not half.



Return to posts index

Harvola
Re: converting ntsc .mov to halfsize .flv for the web
on Jul 17, 2006 at 4:26:46 am

thanks! - but i'm still confused about this:

should i select SQUARE PIXELS in my comp set-up ?
(this AFX comp is strictly for generating these files for the website.)

also: i'm no math whiz, but 320 x 2.25 = 720 and 240 x 2.25 = 540
...doesn't that make 320 x 240 the equivalent of 720 x 540 ?

sorry to be so rudimentary! - this puzzles my very analog mind.



Return to posts index


Bret Williams
Re: converting ntsc .mov to halfsize .flv for the web
on Jul 17, 2006 at 4:56:05 am

No need to make a comp a particular size. Do it all in the render que.

Drop your DV file into a DV comp just as normal. On output, simply output at 320x240. Non-field rendered. 15fps. 22khz mono, 16bit, etc.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]