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converting ntsc .mov to halfsize .flv for the web

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Harvola
converting ntsc .mov to halfsize .flv for the web
on Jul 16, 2006 at 3:38:14 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 LOSSLESS 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.




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daniel_l
Re: converting ntsc .mov to halfsize .flv for the web
on Jul 17, 2006 at 9:13:41 am

I'd supply him with 720x480 NTSC DV (non-square) During his encode he'll drop down to 320x240 (square).

Digital video uses non-sqaure and computers use square. Pay attention to the aspect ratio, not the frame dimensions - i.e. both 720x480 and 320x240 are 4:3.

more here: http://www.creativecow.net/articles/gerard_rick/pixel_madness/

& here:

http://www.google.co.uk/search?hl=en&q=square+vs+non+square+pixels&meta=



Video AllSorts


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Charles Simonson
Re: converting ntsc .mov to halfsize .flv for the web
on Jul 17, 2006 at 9:11:41 pm

I would also ask him what application he plans to use for encoding. For instance, if it is Squeeze, then it may be best to preprocess everything on your end before sending the sources to the encoder. Mostly this is because Squeeze has a terrible scaling engine IMO compared to AFX. In such case you should resize to square pixels and deinterlace if necessary. And I would try to keep the audio stereo if the audio is important to your work.


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