comp.lang.idl-pvwave archive: archive » Re: Reading various HDF files

Home » Public Forums » archive » Re: Reading various HDF files

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Reading various HDF files [message #46277 is a reply to message #46199]

Thu, 10 November 2005 11:46

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

I don't want to complicate things but forget about MPEG. MPEG is most
often a lousy format for scientific animations. I would suggest writing
all of your frames to disk as individual .png files then using another
program to create the animation.

For 8-bit animations, it's tough to beat the FLI/FLC format. Rich
Signell has a page with all you need to know to get started with FLI/FLC
format at: http://woodshole.er.usgs.gov/operations/modeling/flc.html

For 24-bit animations it is a bit more complicated as there are a number
of encoder/decoders out there. I would be happy to advise further if
you want to go this route.

If you just want to stick with MPEG, understand that most MPEG players
only support certain frame sizes and bit rates so to ensure
compatibility you need to stick to them. For frames sizes, I would
stick with D1 (704x480 or 720x480), half D1 (352x480), and quarter D1
(352x240). MPEG-2 will give you better overall quality vs file size but
not all media players play MPEG-2 content (for example, Windows Media
Player requires a special plug-in). MPEG-1 is widely compatible but you
are limited in maximum bit-rate (1856 kbps) and quality vs file size
isn't as good as MPEG-2.

-Rick

Nicola wrote:
> Actually for the moment I've tried only to read each sds and then to
> extract the let's call 0-zplane. I did not tried for the moment start
> and count which will be me reading just one plane and so I can divided
> for 8 the computational time. I will try..and also I will try mpeg_put
> (although I was not succesfully in creating mpeg file with IDL up to
> now :-( )
> thank's a lot
> n
>

Report message to a moderator

[Message index]

		Re: Reading various HDF files By: David Fanning on Wed, 09 November 2005 05:35
		Re: Reading various HDF files By: Nicola on Wed, 09 November 2005 05:19
		Re: Reading various HDF files By: peter.albert@gmx.de on Wed, 09 November 2005 05:11
		Re: Reading various HDF files By: Nicola on Wed, 09 November 2005 04:35
		Re: Reading various HDF files By: peter.albert@gmx.de on Wed, 09 November 2005 03:37
		Re: Reading various HDF files By: Rick Towler on Thu, 10 November 2005 11:46
		Re: Reading various HDF files By: peter.albert@gmx.de on Wed, 09 November 2005 05:36

Previous Topic:	IDL 6.2 IDLgrImage SUB_RECT and TILING
Next Topic:	Partial implementation of XML-RPC

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 17:35:36 PDT 2025

Total time taken to generate the page: 0.00720 seconds