gif

问题 The demo below tries to draw the GIF on form's canvas. It doesn't work. The image won't advance. How to make it work? procedure TForm1.FormCreate(Sender: TObject); begin GIF := TGIFImage.Create; GIF.LoadFromFile('c:\2.gif'); end; procedure TForm1.FormDestroy(Sender: TObject); begin GIF.Free; end; procedure TForm1.Button1Click(Sender: TObject); VAR i: Integer; begin REPEAT for i:= 0 to GIF.Images.Count-1 DO begin DisplayGifFrame(i); Sleep(30); end; UNTIL FALSE; end; procedure TForm1

问题 The demo below tries to draw the GIF on form's canvas. It doesn't work. The image won't advance. How to make it work? procedure TForm1.FormCreate(Sender: TObject); begin GIF := TGIFImage.Create; GIF.LoadFromFile('c:\2.gif'); end; procedure TForm1.FormDestroy(Sender: TObject); begin GIF.Free; end; procedure TForm1.Button1Click(Sender: TObject); VAR i: Integer; begin REPEAT for i:= 0 to GIF.Images.Count-1 DO begin DisplayGifFrame(i); Sleep(30); end; UNTIL FALSE; end; procedure TForm1

问题 We use gifs for our blog extensively. We used to embed tenor nano gifs(90px height maintaining aspect ratio, used for GIF previews and shares on mobile) in it. Now we wanted to create our own gifs and are using the following command to convert mp4 to gif while maintaining the properties of tenor's nano gif. using ffmpeg version 4.1.4 But we observed a huge difference in size between the gif we created and the one created using tenor. ffmpeg -i input.mp4 -filter_complex "[0:v]fps=10,scale=-1

问题 I have a project with Laravel 7.1 and Backpack and I lose the animation of the GIF images on upload. CRUD $this->crud->addField([ 'name' => 'photo', 'label' => 'Imagen ES', 'type' => 'image', 'upload' => false, 'prefix' => 'uploads/', ]); MODEL public function setPhotoAttribute($value){ $year = date('Y'); $attribute_name = "photo"; $disk = "uploads"; $destination_path = "/noticias/$year"; // if the image was erased if ($value==null) { // delete the image from disk \Storage::disk($disk)-

问题 I have some frames within gif and i want to play them on canvas with collision detection. Is there someway how to extract frames from gif with javascript? 回答1: The short answer is that JavaScript has no simple way of controlling the current frame of an Animated GIF. The long answer is that there are sort-of ways to do what you want with just JS, but they are very much convoluted hacks. Example of hackish way: Create a canvas and don't add it to the DOM (so this won't be seen by anyone). In a

问题 I have some frames within gif and i want to play them on canvas with collision detection. Is there someway how to extract frames from gif with javascript? 回答1: The short answer is that JavaScript has no simple way of controlling the current frame of an Animated GIF. The long answer is that there are sort-of ways to do what you want with just JS, but they are very much convoluted hacks. Example of hackish way: Create a canvas and don't add it to the DOM (so this won't be seen by anyone). In a

问题 I try resize animated gif. I resize each frame as bitmap and then make new animated gif but I don't know how to get frame delay for same speed animation as in original gif. uses Gifimg; procedure TForm1.FormCreate(Sender: TObject); var gif: TGIFImage; bmp,bmp2: TBitmap; i:integer; gifren: TGIFRenderer; gif2:TGifImage; begin gif:=TGIFImage.Create; gif2:=tgifimage.Create; bmp:=TBitmap.Create; bmp2:=TBitmap.Create; gif.LoadFromFile('d:\z.gif'); gifren:=TGIFRenderer.Create(gif); for i:=0 to gif

问题 I want to compress a GIF image by extracting 15 frames from the GIF that preferably should be distinct. I'm using Python and Pillow library and I didn't find any way to get the number of frames a GIF has in the Pillow docs. Neither did I find how to extract a specific frame from a GIF, because Pillow restricts that. Is there any way to extract frames without iterating through each frame consequently? Is there a more advanced Python library for GIF processing? 回答1: For the number of frames,

问题 I want to compress a GIF image by extracting 15 frames from the GIF that preferably should be distinct. I'm using Python and Pillow library and I didn't find any way to get the number of frames a GIF has in the Pillow docs. Neither did I find how to extract a specific frame from a GIF, because Pillow restricts that. Is there any way to extract frames without iterating through each frame consequently? Is there a more advanced Python library for GIF processing? 回答1: For the number of frames,

问题 I searched for other similar questions but that didn't solve my problem. Below is a simple code that generates an animation in the form of a gif image in matplotlib: import numpy as np import matplotlib.pylab as plt import matplotlib.animation as anm fig = plt.figure() def draw(i): x = np.linspace(0, 5, num = 1000) y = np.sin(x-i*0.1) plt.clf() plt.plot(x, y, 'r-') anim = anm.FuncAnimation(fig, draw, frames = 10, interval = 500, repeat = False) anim.save('test.gif', fps = 1, writer =