On Tue, Sep 2, 2008 at 10:31 AM, FreeBSD <[EMAIL PROTECTED]> wrote: > Andrew Gould a écrit : > >> >> >> On Tue, Sep 2, 2008 at 10:23 AM, FreeBSD <[EMAIL PROTECTED]<mailto: >> [EMAIL PROTECTED]>> wrote: >> >> Tom Marchand a écrit : >> >> Hash the images and compare the hashes. >> >> -------------- Original message ---------------------- >> From: FreeBSD <[EMAIL PROTECTED] >> <mailto:[EMAIL PROTECTED]>> >> >> Hi everyone, >> >> I'm trying to determine if 2 jpeg images are identical. The >> images are screenshots taken with scrot at different times. >> The point is to know if the display is working correctly. I >> tried to use 'diff' but without success, probably because of >> the metadata included in the image. I also tried the >> 'compare' command from imagemagick, but it produce an image >> containing the difference between the 2 images instead of >> telling me if both images are identical. >> >> So, my question is what are you using to determine if 2 >> images are identical? >> >> I'm using FreeBSD 7.0 and I need to be able to script this >> comparaison for an integration in Nagios. >> >> Thank you, >> >> Martin >> >> >> I just tried it and it doesn't work. The hashes are different. I can't >> say that I'm surprised since 'diff' is "seeing" a difference between >> the >> two identical images. >> >> >> Thanks for the suggestion >> >> >> Yes, there's a huge difference between testing differences in images and >> testing differences in files. What do you mean by "...know if the display >> is working correctly."? >> >> Andrew >> > > I want to determine if Mplayer is working correctly. The best way to be > sure is to check if the display on the screen is changing. That's the > purpose of the screenshots. The screenshots are taken by Nagios every 5 > minutes and the new screenshot is compared with the preceding one. But, by > now, it doesn't work because every tool we try is seeing a diffence between > 2 identical images. > > Thank you for your interest >
Are you simply trying to determine whether the mplayer has finished playing a movie (that you're not watching)? It seems to me that the fact that the image changes is not a good indication that mplayer is "working correctly", only that the movie isn't running. _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"