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NGif, Animated GIF Encoder for .NET

, 1 Sep 2005 CPOL 817K 11.3K 111
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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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About the Author

gOODiDEA.NET

China China
No Biography provided

Comments and Discussions

 
SuggestionThis works, but there's a better and much faster library (Bumpkit) Pin
Member 112479846-Mar-15 1:59
memberMember 112479846-Mar-15 1:59 
GeneralMy vote of 1 Pin
Member 1007116316-Aug-14 3:37
memberMember 1007116316-Aug-14 3:37 
QuestionArithmetic operation resulted in an overflow. Pin
Joshua Galloway8-Aug-14 5:53
memberJoshua Galloway8-Aug-14 5:53 
QuestionGreat tool, saved me a lot of work! Pin
mingonn29-Jan-14 14:58
membermingonn29-Jan-14 14:58 
GeneralGreate Job :) Pin
Vinaymm12-Dec-13 1:51
memberVinaymm12-Dec-13 1:51 
Questionsize limit? Pin
Member 39966278-Nov-13 10:47
memberMember 39966278-Nov-13 10:47 
AnswerRe: size limit? Pin
Nicke Da Silva Manarin21-Feb-14 12:43
memberNicke Da Silva Manarin21-Feb-14 12:43 
AnswerRe: size limit? Pin
Member 106623506-Jun-14 10:42
memberMember 106623506-Jun-14 10:42 
QuestionFileStream vs Stream Pin
Member 1033860916-Oct-13 7:32
memberMember 1033860916-Oct-13 7:32 
AnswerRe: FileStream vs Stream Pin
Nicke Da Silva Manarin22-Oct-13 9:01
memberNicke Da Silva Manarin22-Oct-13 9:01 
QuestionI get black backgrounds. Has anyone ever come up with a solution for this? Pin
Member 946120617-Sep-13 21:39
memberMember 946120617-Sep-13 21:39 
SuggestionDelay method Pin
Sylvainguer17-Jul-13 22:58
memberSylvainguer17-Jul-13 22:58 
QuestionHow do i add this to my project? Pin
droidap24-May-13 9:16
memberdroidap24-May-13 9:16 
AnswerRe: How do i add this to my project? Pin
Member 1029123023-Sep-13 1:33
memberMember 1029123023-Sep-13 1:33 
QuestionI created a new dll file which is a wrapper from c++ of a gif animation if you want Pin
chocolade18-May-13 5:32
memberchocolade18-May-13 5:32 
QuestionSystem.Windows.Media.Imaging.GifBitmapEncoder Pin
Pie At The Raven16-May-13 13:14
memberPie At The Raven16-May-13 13:14 
AnswerRe: System.Windows.Media.Imaging.GifBitmapEncoder Pin
Member 1029123023-Sep-13 1:31
memberMember 1029123023-Sep-13 1:31 
QuestionNot properly disposing/closing images Pin
rdavidson228-Jul-12 12:26
memberrdavidson228-Jul-12 12:26 
QuestionThank you Pin
Member 835751315-Jun-12 17:30
memberMember 835751315-Jun-12 17:30 
QuestionBugfixed version [modified] Pin
avianbc11-Jun-12 15:22
memberavianbc11-Jun-12 15:22 
AnswerRe: Bugfixed version Pin
class_Volrath28-Jun-14 13:19
memberclass_Volrath28-Jun-14 13:19 
AnswerRe: Bugfixed version Pin
horsedrowner30-Jun-14 8:13
memberhorsedrowner30-Jun-14 8:13 
GeneralMy vote of 5 Pin
manoj kumar choubey4-Mar-12 20:47
membermanoj kumar choubey4-Mar-12 20:47 
Bug[Bug] Last two pixels of every frame is wrong. Pin
codipro7-Jan-12 3:14
membercodipro7-Jan-12 3:14 
GeneralRe: [Bug] Last two pixels of every frame is wrong. Pin
morhost28-Feb-12 5:51
membermorhost28-Feb-12 5:51 
The bug is in class LZWEncoder, method NextPixel()...

Here is the fix:

private int NextPixel()
{
  if (curPixel <= pixAry.GetUpperBound(0))
  {
    byte pix = pixAry[curPixel++];
    return pix && 0xff;
  }
  else
    return (EOF);
}

Variable remaining in the original code is unuseful and can be removed at all.
GeneralRe: [Bug] Last two pixels of every frame is wrong. Pin
Member 1034753121-Oct-13 9:23
memberMember 1034753121-Oct-13 9:23 
GeneralTransperency Pin
JeremiasK24-Feb-11 8:45
memberJeremiasK24-Feb-11 8:45 
GeneralRe: Transperency Pin
v2leon28-Aug-11 23:49
memberv2leon28-Aug-11 23:49 
GeneralRe: Transperency Pin
maoshu22-Dec-12 1:14
membermaoshu22-Dec-12 1:14 
GeneralRe: Transperency Pin
Froogabadoodle4-Jun-13 5:48
memberFroogabadoodle4-Jun-13 5:48 
QuestionSecurity Warning [modified] Pin
jedi-samurai18-Dec-10 22:53
memberjedi-samurai18-Dec-10 22:53 
AnswerRe: Security Warning [modified] Pin
Jajnick1-Sep-12 6:14
memberJajnick1-Sep-12 6:14 
GeneralLZWEncoder Pin
tom roarty12-Dec-10 5:59
membertom roarty12-Dec-10 5:59 
QuestionGifDecoder.cs exceptions Pin
Divya Muppa29-Sep-10 11:16
memberDivya Muppa29-Sep-10 11:16 
GeneralTransparency Pin
gameguy2716-Aug-10 7:39
membergameguy2716-Aug-10 7:39 
GeneralBug involving the first frame Pin
Dataflashsabot23-Jan-10 3:56
memberDataflashsabot23-Jan-10 3:56 
GeneralI've released a derived work Pin
sbridewell24-Oct-09 11:44
membersbridewell24-Oct-09 11:44 
GeneralRe: I've released a derived work Pin
jambonbill3-Nov-09 16:39
memberjambonbill3-Nov-09 16:39 
General"The process cannot access the file xpto because it is being used by another process". Pin
chico@dsi30-Sep-09 0:52
memberchico@dsi30-Sep-09 0:52 
GeneralRe: "The process cannot access the file xpto because it is being used by another process". Pin
Rassler481-Mar-13 2:16
memberRassler481-Mar-13 2:16 
QuestionCan I release a derived work please? Pin
sbridewell4-Sep-09 10:12
membersbridewell4-Sep-09 10:12 
AnswerRe: Can I release a derived work please? Pin
jambonbill6-Oct-09 4:04
memberjambonbill6-Oct-09 4:04 
GeneralRe: Can I release a derived work please? Pin
sbridewell6-Oct-09 11:54
membersbridewell6-Oct-09 11:54 
GeneralRe: Can I release a derived work please? Pin
jambonbill6-Oct-09 15:50
memberjambonbill6-Oct-09 15:50 
GeneralRe: Can I release a derived work please? [modified] Pin
sbridewell7-Oct-09 10:10
membersbridewell7-Oct-09 10:10 
GeneralResize an animated gif background transparency Pin
vuivuivui26-Aug-09 22:23
membervuivuivui26-Aug-09 22:23 
Questionhow to force no transparency Pin
AreJay20-Aug-09 8:55
memberAreJay20-Aug-09 8:55 
Generalit can't store more than 19 frames. Pin
inamgul26-Feb-09 2:00
memberinamgul26-Feb-09 2:00 
GeneralAnimated gif Timeline Properties Pin
Daffy1012-Nov-08 23:01
memberDaffy1012-Nov-08 23:01 
Generalan better implement Pin
gOODiDEA.NET13-Oct-08 15:54
membergOODiDEA.NET13-Oct-08 15:54 

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