awg0971@ritvax.isc.rit.edu (GOTTLOB, AW) (01/17/91)
I have been trying for a while now to use GIFs from many FTP sites and none of
them have been working. The biggest FTP site was ticsys.tamu.edu which has
hundreds. By the color count, some seem to be from the Mac. But if I try to
convert them, SHR convert gives me an unknown error. ANy help on this or info
on a good GIF site for Apple ][s would be most appriciated.
-King Lerch jpenne@ee.ualberta.ca (Jerry Penner) (01/20/91)
In article <1991Jan17.001415.18763@isc.rit.edu> awg0971@ritvax.isc.rit.edu writes: >I have been trying for a while now to use GIFs from many FTP sites and none of >them have been working. The biggest FTP site was ticsys.tamu.edu which has >hundreds. By the color count, some seem to be from the Mac. But if I try to >convert them, SHR convert gives me an unknown error. ANy help on this or info >on a good GIF site for Apple ][s would be most appriciated. > > -King Lerch Well, the first thing to ask yourself is, "Did I set binary mode?". FTPing text files should be done in ASCII mode but when sending GIFs or other "binary" based files, you must set binary mode so that certain characters do not get translated into something else during the transfer. Usually, the 0x0A chars get translated into 0x0D's or vice versa. Whatever, it will screw up your GIF. The second thing to ask is? How are you transferring from your host system (Unix, VMS, ???) to your Apple? Some things, like Unix Xmodem also deal with binary or text files, and again you must set binary mode for the above reason. Hope that helps. -- ------------- Jerry Penner alberta!bode!jpenne Edmonton, Alberta, Canada
SHBOUM@MACALSTR.EDU (01/20/91)
In article <1991Jan17.001415.18763@isc.rit.edu> awg0971@ritvax.isc.rit.edu writes: >I have been trying for a while now to use GIFs from many FTP sites and none of >them have been working. The biggest FTP site was ticsys.tamu.edu which has >hundreds. By the color count, some seem to be from the Mac. But if I try to >convert them, SHR convert gives me an unknown error. ANy help on this or info >on a good GIF site for Apple ][s would be most appriciated. > > -King Lerch As mentioned in an earlier article, do make sure that all the transferring is done in binary. Also make sure that there are no macintosh headers on the gif files {a mac program} as these mess up the Apple's gif viewers. To check and make sure that there are no headers in the file, after downloading the file, use ProTERM {or any other program that can type files} and check the first part of the file. If the file does not start out with GIF8xx. {xx being wild}, then you have a header. I believe that there are programs to strip this header. If anyone would like to obtain it, let me know. Also, unless you want to display the GIFS on a graphic system better than the IIGS - i.e. a 256 color mac - GIFS of size over 100K aren't going to be appropiate for the IIGS right now. Perhaps LHG might change all that. Maybe we can start a II gif archive for Gifs that look well on the II's... | Hal Bouma | Send mail to SHBOUM@MACALSTR.EDU | Macalester College | GEnie : H.BOUMA
gwyn@smoke.brl.mil (Doug Gwyn) (01/22/91)
In article <D04CA2D9FFFF008D33@MACALSTR.EDU> SHBOUM@MACALSTR.EDU writes: >Also make sure that there are no macintosh headers on the gif files >{a mac program} as these mess up the Apple's gif viewers. What I recommend for creators of GIF viewers is that they scan the purported GIF file until the "GIF" header is seen, rather than assuming that the header starts at byte zero. This solves the !*(&%^$ MacBinary header problem.