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Re: AVIs for the Mac [message #63689 is a reply to message #63679]

Tue, 18 November 2008 17:48

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On Nov 18, 6:14 pm, Rick Towler <rick.tow...@nomail.noaa.gov> wrote:
> Dan Larson wrote:
>> On Nov 18, 9:40 am, "M. Katz" <MKatz...@yahoo.com> wrote:
>>> If you post a link to one of your AVI files, then you could ask Mac
>>> users to try to view it. Not everyone will have the same codecs
>>> installed, and some of us could try an 'out of the box' Mac
>>> installation.
>>> -M
>
>> Thanks Rick, I will try those suggestions. Since you don't mention
>> uncompressed AVIs, except for use in Quicktime Pro, I assume the
>> Quicktime freeware doesn't like them? i.e. is it always safer to use
>> some kind of codec?
>
> Well, I believe that Quicktime can play uncompressed AVI files but I
> don't think most people would appreciate downloading the extremely large
> files you'll generate. The reason you would generate uncompressed .avi
> files is that you don't want to lose image quality when re-encoding the
> video in QuickTime (or whatever program you ultimately use).

I downloaded your AVI file and viewed it with Quicktime successfully.

> Your original file was 180 MB. Compressed in Windows Media Encoder
> (free) as a 5Mbps "Hi-def" video you end up with a file that is 84 KB.
> KILOBYTES! 0.04% of the original videos size. And it looks great. I
> also ran it thru the Indeo Video 4.5 and 5 encoders. The output file
> was ~280 KB. 0.15% of the original. Still not bad but I couldn't avoid
> some ghosting around the red box in the video so it may not be the best
> choice. Neither of these codecs are playable in Quicktime but you get
> an idea of how much you can compress your animation. I also noticed
> that I didn't have Indeo 4.4 on my machine so it may not be available
> anymore.
>
> My guess would be that with Quicktime Pro you could get results similar
> to the .wmv. If you have $30 to spend I would do that as it is by far
> the simplest way. If not, there are opensauce programs that you can
> cobble together to encode your uncompressed AVI (check out ffmpeg).

I converted your original to H.264 using Quicktime Pro, the result is
193K (but settings could probably be tweaked to get better
compression). I couldn't see a difference, but here is the converted
animation:

http://michaelgalloy.com/wp-content/uploads/2008/11/utr0810_ 001.mp4

Mike
--
www.michaelgalloy.com
Tech-X Corporation
Associate Research Scientist

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[Message index]

		Re: AVIs for the Mac By: Jeremy Bailin on Wed, 19 November 2008 06:36
		Re: AVIs for the Mac By: Michael Galloy on Tue, 18 November 2008 17:48
		Re: AVIs for the Mac By: Rick Towler on Tue, 18 November 2008 17:14
		Re: AVIs for the Mac By: Dan Larson on Tue, 18 November 2008 15:27
		Re: AVIs for the Mac By: Dan Larson on Tue, 18 November 2008 15:25
		Re: AVIs for the Mac By: M. Katz on Tue, 18 November 2008 06:40
		Re: AVIs for the Mac By: Rick Towler on Mon, 17 November 2008 17:09
		Re: AVIs for the Mac By: David Fanning on Mon, 17 November 2008 14:31
		Re: AVIs for the Mac By: Vince Hradil on Wed, 19 November 2008 08:40
		Re: AVIs for the Mac By: Dan Larson on Fri, 21 November 2008 07:11

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