| Re: AVIs for the Mac [message #63679] |
Wed, 19 November 2008 06:36  |
Jeremy Bailin
Messages: 618
Registered: April 2008
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Senior Member |
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On Nov 18, 6:27 pm, Dan Larson <dlar...@aecom.yu.edu> wrote:
> On Nov 18, 6:25 pm, Dan Larson <dlar...@aecom.yu.edu> 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?
>
>> And, just for kicks, I posted the movie (uncompressed AVI) on an FTP
>> site if any mac users want to give it a go :-)
>
>> dan
>
> whoops, forgot the FTP address:ftp://depot.aecom.yu.edu/pub/kWqdn381V3pquQlVI624
Plays fine on my PowerBook G4, OS X 10.5.5, QuickTime 7.5.5 (990.7).
But it is absurdly large.
-Jeremy.
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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
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Senior Member |
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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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| Re: AVIs for the Mac [message #63690 is a reply to message #63689] |
Tue, 18 November 2008 17:14 |
Rick Towler
Messages: 821
Registered: August 1998
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Senior Member |
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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).
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).
> And, just for kicks, I posted the movie (uncompressed AVI) on an FTP
> site if any mac users want to give it a go :-)
Case in point, it took ~10 minutes to download.
-Rick
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| Re: AVIs for the Mac [message #63692 is a reply to message #63690] |
Tue, 18 November 2008 15:27 |
Dan Larson
Messages: 21
Registered: March 2002
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Junior Member |
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On Nov 18, 6:25 pm, Dan Larson <dlar...@aecom.yu.edu> 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?
>
> And, just for kicks, I posted the movie (uncompressed AVI) on an FTP
> site if any mac users want to give it a go :-)
>
> dan
whoops, forgot the FTP address:
ftp://depot.aecom.yu.edu/pub/kWqdn381V3pquQlVI624
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| Re: AVIs for the Mac [message #63693 is a reply to message #63692] |
Tue, 18 November 2008 15:25 |
Dan Larson
Messages: 21
Registered: March 2002
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Junior Member |
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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?
And, just for kicks, I posted the movie (uncompressed AVI) on an FTP
site if any mac users want to give it a go :-)
dan
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| Re: AVIs for the Mac [message #63817 is a reply to message #63692] |
Wed, 19 November 2008 08:40 |
Vince Hradil
Messages: 574
Registered: December 1999
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Senior Member |
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On Nov 18, 5:27 pm, Dan Larson <dlar...@aecom.yu.edu> wrote:
> On Nov 18, 6:25 pm, Dan Larson <dlar...@aecom.yu.edu> 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?
>
>> And, just for kicks, I posted the movie (uncompressed AVI) on an FTP
>> site if any mac users want to give it a go :-)
>
>> dan
>
> whoops, forgot the FTP address:ftp://depot.aecom.yu.edu/pub/kWqdn381V3pquQlVI624
FWIW - I was able to convert your original avi into an mp4 file using
MeGUI and AviSynth on my Windows XP PC. The resulting mp4 is about
376 Kb (a bit larger than Mike's) but it plays in Quicktime - and
MeGUI and AviSynth are free!
It wasn't _exactly_ straightforward, but I figured it out in about a
half hour. Let me know if you want more details on the re-encoding.
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| Re: AVIs for the Mac [message #63903 is a reply to message #63817] |
Fri, 21 November 2008 07:11 |
Dan Larson
Messages: 21
Registered: March 2002
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Junior Member |
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Thanks to all those who downloaded the movie, ran it on their Mac, and
then proceeded to outdo one another with compression efficiency ;-)
In my defense, the reason why I return the uncompressed movie is that
my collaborators often (despite my best efforts) choose to treat the
AVI output as raw data and do other analyses on it. However, the
posts have given me some ammo when I say these movies can run on a
Mac.
Now I have a general follow up question: if the software which
GENERATES the AVIs works fine on PC and Linux and doesn't work on the
Mac, is there a way for the Virtual Machine to return the specific
errors that are being encountered? In other words, if I am not
running a full version of IDL on the Mac, is there some way to debug
this program remotely? For the life of me, I cannot figure out why my
distributed app is not working in this one specific way (AVI
generation) on one specific platform.
thanks,
Dan
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