[英]How to resize animated gif file using imagemagick without destroying animation using C#?
I am using imagemagick DLL (Refer: http://www.imagemagick.org ) for the resize image, 我正在使用imagemagick DLL(请参阅: http : //www.imagemagick.org )来调整图像大小,
But when I re-sized animated GIF image then it going screw. 但是,当我重新调整动画GIF图像的大小时,它就会发生问题。
I using below code for re-size image ( image type are png, gif, jpg, bmp, tif ...) 我使用以下代码调整图像大小(图像类型为png,gif,jpg,bmp,tif ...)
ImageMagickObject.MagickImage imgLarge = new ImageMagickObject.MagickImage();
object[] o = new object[] { strOrig, "-resize", size, "-gravity", "center", "-colorspace", "RGB", "-extent", "1024x768", strDestNw };
imgLarge.Convert(ref o);
How can I fixed it. 我该如何解决。 see the result image
查看结果图片
I think you have to extract every single frame from the gif first, resize every single frame and then put it back together. 我认为您必须首先从gif中提取每个帧,调整每个帧的大小,然后再放回去。
Edit: like this? 编辑:这样吗? Not tested nor builded...
未经测试或构建...
int maxFrames=32;
ImageMagickObject.MagickImage imgLarge = new ImageMagickObject.MagickImage();
// first extract all frames from gif to single png files
for(int frame=0; frame<maxFrames;frame++)
{
object[] o = new object[] { String.Format(strOrig+"[{0}]", frame)
, String.Format("tmp{0}.png", frame) };
imgLarge.Convert(ref o);
}
// resize every single png files
// add resized filenames to stringbuilder
StringBuilder filenames = new StringBuilder();
for(int frame=0; frame<maxFrames;frame++)
{
object[] o = new object[] { String.Format("tmp{0}.png", frame)
, "-resize"
, size
, "-gravity"
, "center"
, "-colorspace"
, "RGB"
, "-extent"
, "1024x768"
, String.Format("tmp-resized{0}.png", frame) };
filenames.Append(String.Format("tmp-resized{0}.png", frame));
filenames.Append(Environment.NewLine);
imgLarge.Convert(ref o);
}
// write resized filenames to file
File.WriteAllText("tmp-resized-files.txt", filenames);
// create resize animated gif based on filenames in the tmp-resized-files.txt
object[] o = new object[] { "@tmp-resized-files.txt"
, strDestNw };
imgLarge.Convert(ref o);
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