Legacy ImageMagick Discussions Archive

ImageMagick resource usage is dependant on the area of the image so with less area you would expect faster processing time. If you want to rotate an image 90 degrees and resize it to 50% it would make sense to first resize the image then rotate it.

Well there you go, ImageMagick cannot compile/link against the Freetype delegate library unless the header files are available. Fix this problem and rerun the ImageMagick configure script.

Grab ImageMagick-6.2.6-5, the current release and see if you have better luck. We added a patch for Fax and group 4 compression. If it fails, let us know and we will investigate further.

ImageMagick requires the Freetype delegate library and Ghostscript to run the regression tests. Run the configure script again. The last 40 lines or so probably says it could not validate the Freetype library. Check config.log to determine why. Fix the problem and rerun the configure script until th...

Not sure what the problem is. We run over 350 PerlMagick regression tests before PerlMagick is released to ensure no bugs are present in the distribution.

You can affect the MPEG creation with the -quality , -delay, -ticks-per-scond, and -sampling-factor command line options. You could always edit the source of coders/mpeg.c to adjust the MPEG configuration file.

Not a bug, but there is room to improve the algorithm. It appears for 45 degrees we are over allocating the initial rotated image size before it is cropped to the final size. We could speed up the rotation a bit by attending to this enhancement. We'll add it to the list of things to do.

We have staging areas for development code. The PDF patch was in a staging area that has not quite made it to release status. It will be in the next point release. Look for an update to ImageMagick-6.2.6-6 within 48 hours.

AcquireSemaphore() is light-weight. There is a fair bit of overhead when starting ImageMagick so if you have a short quick task the start-up costs are high. The start-up cost becomes negligible for longer running tasks. You can initalize any of the ImageMagick lists before threading is enabled by ca...

Try -crop again but add +repage after it so your PNG images will display properly.

You would probably would have better luck with the Q8 version of ImageMagick if you are not already using it. It uses 50% less memory than the Q16 version. We tried your command under Fedora Core 5 on a 1GB machine with ImageMagick 6.2.6-5 Q16 and it created a 2811x2811 rotated image in 17 seconds o...

Your image is being cached to disk which is dog slow compared to in-memory rotation. Add -debug cache to your command line to track progress.

Ok, post a URL so we can attempt to reproduce the problem.

The reason the PNG delegate library failed to validate can be found in the config.log file generated by the configure script. Fix the problem and rerun the configure script until the PNG delegate library is validated.

Your process is probably not hanging, instead its probably just taking a real long time to complete. Add -monitor to your command line to monitor the progress of the image rotation operation.