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Posted 1 Sep 2005
Licenced CPOL

NGif, Animated GIF Encoder for .NET

, 1 Sep 2005
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Create animated GIF images using C#.

Sample Image - NGif.gif

Introduction

Because .NET Framework can't create animated GIF images, NGif provides a way to create GIF animations in the .NET framework. It can create an animated GIF from several images and extract images from an animated GIF.

Using the code

/* create Gif */
//you should replace filepath
String [] imageFilePaths = new String[]{"c:\\01.png","c:\\02.png","c:\\03.png"}; 
String outputFilePath = "c:\\test.gif";
AnimatedGifEncoder e = new AnimatedGifEncoder();
e.Start( outputFilePath );
e.SetDelay(500);
//-1:no repeat,0:always repeat
e.SetRepeat(0);
for (int i = 0, count = imageFilePaths.Length; i < count; i++ ) 
{
 e.AddFrame( Image.FromFile( imageFilePaths[i] ) );
}
e.Finish();
/* extract Gif */
string outputPath = "c:\\";
GifDecoder gifDecoder = new GifDecoder();
gifDecoder.Read( "c:\\test.gif" );
for ( int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++ ) 
{
 Image frame = gifDecoder.GetFrame( i ); // frame i
 frame.Save( outputPath + Guid.NewGuid().ToString() 
                       + ".png", ImageFormat.Png );
}

Points of Interest

Use Stream to replace BinaryWriter when you write a fixed-byte structured binary file.

History

  • 31 Aug 2005: Draft.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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Comments and Discussions

 
AnswerRe: Security Warning [modified] Pin
Jajnick1-Sep-12 5:14
memberJajnick1-Sep-12 5:14 
GeneralLZWEncoder Pin
tom roarty12-Dec-10 4:59
membertom roarty12-Dec-10 4:59 
QuestionGifDecoder.cs exceptions Pin
Divya Muppa29-Sep-10 10:16
memberDivya Muppa29-Sep-10 10:16 
GeneralTransparency Pin
gameguy2716-Aug-10 6:39
membergameguy2716-Aug-10 6:39 
GeneralBug involving the first frame Pin
Dataflashsabot23-Jan-10 2:56
memberDataflashsabot23-Jan-10 2:56 
GeneralI've released a derived work Pin
sbridewell24-Oct-09 10:44
membersbridewell24-Oct-09 10:44 
GeneralRe: I've released a derived work Pin
jambonbill3-Nov-09 15:39
memberjambonbill3-Nov-09 15:39 
General"The process cannot access the file xpto because it is being used by another process". Pin
frantic029-Sep-09 23:52
professionalfrantic029-Sep-09 23:52 
Hello,

nice work on this library. One detail though; after AnimatedGifEncoder finishes i try to delete the input files however the following exception arises: "System.IO.IOException: The process cannot access the file 'C:\img.jpg.2gf.5' because it is being used by another process."

This is the code that i have added the Example.Main().

Thread t = new Thread(delegate()
                {
                    try
                    {
                        foreach (var filePath in imageFilePaths)
                        {
                            new FileInfo(filePath).Delete();
                        }
                    }
                    catch (IOException ex)
                    {

                        /* DoNothing */
                    }
                });

            t.Start();


It catches the exception and it is the cleanest way around i could find. I would like, however, to know if is there any other way around it, like forcing the release of the images in your src code ?

Thank you
GeneralRe: "The process cannot access the file xpto because it is being used by another process". Pin
Rassler481-Mar-13 1:16
memberRassler481-Mar-13 1:16 
QuestionCan I release a derived work please? Pin
sbridewell4-Sep-09 9:12
membersbridewell4-Sep-09 9:12 
AnswerRe: Can I release a derived work please? Pin
jambonbill6-Oct-09 3:04
memberjambonbill6-Oct-09 3:04 
GeneralRe: Can I release a derived work please? Pin
sbridewell6-Oct-09 10:54
membersbridewell6-Oct-09 10:54 
GeneralRe: Can I release a derived work please? Pin
jambonbill6-Oct-09 14:50
memberjambonbill6-Oct-09 14:50 
GeneralRe: Can I release a derived work please? [modified] Pin
sbridewell7-Oct-09 9:10
membersbridewell7-Oct-09 9:10 
GeneralResize an animated gif background transparency Pin
vuivuivui26-Aug-09 21:23
membervuivuivui26-Aug-09 21:23 
Questionhow to force no transparency Pin
Are Jay20-Aug-09 7:55
memberAre Jay20-Aug-09 7:55 
Generalit can't store more than 19 frames. Pin
inamgul26-Feb-09 1:00
memberinamgul26-Feb-09 1:00 
GeneralAnimated gif Timeline Properties Pin
Daffy1012-Nov-08 22:01
memberDaffy1012-Nov-08 22:01 
Generalan better implement Pin
gOODiDEA.NET13-Oct-08 14:54
membergOODiDEA.NET13-Oct-08 14:54 
GeneralRe: an better implement Pin
ecjob21-Oct-08 4:24
memberecjob21-Oct-08 4:24 
GeneralRe: an better implement Pin
Spirch2-Jan-09 14:13
memberSpirch2-Jan-09 14:13 
GeneralRe: an better implement Pin
Ceyhun25-Jul-09 6:20
memberCeyhun25-Jul-09 6:20 
GeneralRe: an better implement Pin
Nathanael Jones5-Jan-12 6:33
memberNathanael Jones5-Jan-12 6:33 
Question怎样才能把体积减少一些啊?? Pin
ecjob11-Oct-08 8:31
memberecjob11-Oct-08 8:31 
General一处bug Pin
interiv@qq.com6-Sep-08 17:05
memberinteriv@qq.com6-Sep-08 17:05 

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