| MPEG image size limit? [message #16518] |
Wed, 28 July 1999 00:00  |
Waleed Al-Nuaimy
Messages: 12
Registered: July 1999
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Junior Member |
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I'm unable to playback any (IDL-generated) MPEGs of image size greater
than 284x284. Is that something to do with the OS (win95), my mpeg
player or the way I'm doing it (below)?
IDL> id = MPEG_OPEN(FILENAME='junk.mpg', [500,500] )
IDL> for i= 0,15 do MPEG_PUT, id, IMAGE = DIST(500), frame = i
IDL> MPEG_SAVE, id
Thanks for any advice.
Waleed Al-Nuaimy
Geo-Services International (UK) Ltd.
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| Re: MPEG image size limit? [message #16548 is a reply to message #16518] |
Tue, 03 August 1999 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Waleed Al-Nuaimy (geoserv@compuserve.com) writes:
> I'm unable to playback any (IDL-generated) MPEGs of image size greater
> than 284x284. Is that something to do with the OS (win95), my mpeg
> player or the way I'm doing it (below)?
>
> IDL> id = MPEG_OPEN(FILENAME='junk.mpg', [500,500] )
> IDL> for i= 0,15 do MPEG_PUT, id, IMAGE = DIST(500), frame = i
> IDL> MPEG_SAVE, id
I'm told by someone who should know that there are three
separate MPEG "standards". IDL's MPEG object can generate
general MPEG-1 or MPEG-2 streams. However, many Windows MPEG
players can only play "Constrained Parameter Bitstream"
formats. These formats are generally limited to images
of less than 352x240 in size. If you generate MPEG streams
that use larger images, you must obtain a more complete
MPEG player. My source recommends Xanim or more recent
versions of ActiveMovie.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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