Create an animated gif from a set of bitmaps?

[Felix. 0]

Subject says it all. How to create an animated gif from a set of bitmaps? (Firemonkey)

 

Thank you

[Remy Lebeau 1393]

AFAIK FireMonkey doesn't support animated GIFs.  Use an 3rd party image library that does.

[Anders Melander 1782]

1 hour ago, Remy Lebeau said:

AFAIK FireMonkey doesn't support animated GIFs.  Use an 3rd party image library that does.

Doesn't TGIFImage (the non-visual part) work with FireMonkey?

[Felix. 0]

5 hours ago, Remy Lebeau said:

AFAIK FireMonkey doesn't support animated GIFs.  Use an 3rd party image library that does.

I don't need to view or play GIFs. I just need to create an animated GIF from a set of bitmaps.

[Anders Melander 1782]

5 hours ago, Felix. said:

I don't need to view or play GIFs. I just need to create an animated GIF from a set of bitmaps.

Try this:

procedure MakeGIF(Bitmap1, Bitmap2, Bitmap3: TBitmap);
var
  GIF: TGIFImage;
  Frame: TGIFFrame;
  GCExt: TGIFGraphicControlExtension;
  LoopExt: TGIFAppExtNSLoop;
begin
  GIF := TGIFImage.Create;
  try
  
    Frame := GIF.Add(Bitmap1);
    // Netscape Loop extension must be the first extension in the first frame!
    LoopExt := TGIFAppExtNSLoop.Create(Frame);
    LoopExt.Loops := 0; // Number of loops (0 = forever)

    // Add Graphic Control Extension
    GCExt := TGIFGraphicControlExtension.Create(Frame);
    GCExt.Delay := 30; // Animation delay (30 = 300 mS)
 
    Frame := GIF.Add(Bitmap2);
    GCExt := TGIFGraphicControlExtension.Create(Frame);
    GCExt.Delay := 30;

    Frame := GIF.Add(Bitmap3);
    GCExt := TGIFGraphicControlExtension.Create(Frame);
    GCExt.Delay := 30;

    GIF.OptimizeColorMap;
    GIF.Optimize([ooMerge, ooCrop], rmNone, dmNearest, 0);

    GIF.SaveToFile('foobar.gif');
  finally
    GIF.Free;
  end;
end;

This is just from (my) memory so I'm not sure if it compiles. It's been a while since I wrote that thing.

You should be able to find plenty of examples if you search for TGIFImage.

[Felix. 0]

2 hours ago, Anders Melander said:

Try this:

This is just from (my) memory so I'm not sure if it compiles. It's been a while since I wrote that thing.

You should be able to find plenty of examples if you search for TGIFImage.

Thank you, your memory is great.

I'll try it today

[Remy Lebeau 1393]

17 hours ago, Anders Melander said:

Doesn't TGIFImage (the non-visual part) work with FireMonkey?

TGIFImage is a VCL class, AFAIK it is not available in FMX.  Also, as I don't use FMX myself, my claim about its lack of support for animated GIFs is mainly based on the below post, which presents some 3rd party solutions for displaying animated GIFs in an FMX UI:

 

https://stackoverflow.com/questions/45285599/how-to-use-animated-gif-in-firemonkey

 

For displaying a series of bitmaps in a UI, one can use TBitmapListAnimation, but I don't know if that can also be used to create a GIF.  Embarcadero's documentation only mentions that FMX's TBitmap supports GIF on all platforms except iOS, but doesn't mention what kinds of GIFs are supported.

Edited December 23, 2021 by Remy Lebeau

[Anders Melander 1782]

Ah yes, TGraphic is a VCL class. I forgot that.

 

I don't use FMX either and I knew FMX couldn't use TGIFImage for display (since that requires TPicture/TImage) but I would have thought one could still use the non-visual stuff such as load/save and GIF manipulation. I guess not.

[Felix. 0]

On 12/23/2021 at 3:22 AM, Remy Lebeau said:

AFAIK FireMonkey doesn't support animated GIFs.  Use an 3rd party image library that does.

Which one would you recommend for Firemonkey?

[kabiri 3]

This question was very old.
I had almost the same question, but I didn't want to make a gif file, this vedeo is good

 

 

Maybe it will help someone.
It doesn't work for me.

Because I want to know which frame is displayed at any moment.

[vfbb 285]

Additional info: On RAD 12 it is possible to encode animated WebP (better format than GIF). See DocWiki.

[Lars Fosdal 1792]

Not to forget, FMX+SKIA+LOTTIE files.