stil / gif-endec Goto Github PK

Hello, when I try to recreate a gif file, which I splitted in frames before, does it somehow look weird.
This only happens with gifs which have transparency.
This is the example file:
Before:

After:

If you load up an animated gif, then substitute the stream of each frame with that of an altered gif file, then re-save, it switches to local color tables (as expected), but it comes out corrupt. Something is wrong about the file format implementation I think, but I don't have time to trace through it.
If I re-save with the same frame streams it works okay. If I hack the code to disable local color table saving it saves okay but with corrupt palette (as expected).

Some GIF's give this error when trying to decode. I have attached a broken GIF and a working GIF

WORKING -
BROKEN -

Source of error: https://github.com/stil/gif-endec/blob/master/src/Renderer.php#L66-L73
Code Example

            $gifStream = new FileStream($uploadedFile);
            $gifDecoder = new Decoder($gifStream);
            $gifRenderer = new Renderer($gifDecoder);

            $gifRenderer->start(function(FrameRenderedEvent $event) use (&$frames) {
                $frames[] = $event->renderedFrame;
            });

The error from laravel

    "message": "Disposal method 3 is not implemented.",
    "exception": "RuntimeException",
    "file": "C:\\wamp64\\www\\minecraftcapes\\vendor\\stil\\gif-endec\\src\\Renderer.php",
    "line": 72,

Hi!
I installed the GIFEndec because Sybio's Lib made some glitchy pixel salad out of my gif graphics.
When I used your test.gif, everything was fine, but with my gif file:
http://www.nokuku.com/objects/bluebird_l.gif
The code throw this exception:

Uncaught exception 'RuntimeException' with message 'Disposal method 2 is not implemented.'

Please could you help me? Thanks in advance!
Lioba

I try to decode the image downloaded from http://icons.wxug.com/i/c/k/clear.gif

it fails. Error I get is "Fatal error: Uncaught Error: Call to a member function setOffset() on null in GIFEndec/Decoder.php:242".

It seems no $this->currentFrame has been created. If I create one "on the fly" in decode() it works.

    public function decode(callable $onFrameDecoded)
    ....
                    case 0x2C:
                        if (!$this->currentFrame) {
                           $this->currentFrame = new Frame();
			}   

Hello I am having issues with the Decoder giving me the error of 'Call to a member function setOffset() on null'

I am receiving a base64 string from the front end, converting that string to a gif image and then writing that image to a folder. Everything seems to work fine until I hit the Decoder. here is my code below.

        public function video(Request $request) {

                $date = Carbon::now()->format('m-d-Y');

                // split the string on commas
                // $data[ 0 ] == "data:image/png;base64"
                // $data[ 1 ] == <actual base64 string>
                $data = explode( ',', $request->image);
                $image = Image::make($data[1])->encode('gif');
                $fileName = uniqid() . '.' . 'gif';
                $location = 'uploads/' . $fileName;
                $image->save($location);
                    

                $gifStream = new FileStream($location);

                 //Create Decoder instance from MemoryStream
        
                $gifDecoder = new Decoder($gifStream);


                //Create Renderer instance
                 
                $gifRenderer = new Renderer($gifDecoder);


                $gifRenderer->start(function (FrameRenderedEvent $event) {
                    //Convert frame index to zero-padded strings (001, 002, 003)
                    $paddedIndex = str_pad($event->frameIndex, 3, '0', STR_PAD_LEFT);
                    // Write frame images to directory
                    imagepng($event->renderedFrame, "uploads/frame{$paddedIndex}.png");
                });
                return 'ok';
    }

how to create gif from frames, if frames are in base64 format?

new FileStream(base64img) not working :(

i nedd frame count in render and decorder.
see in following code
$gifStream = new FileStream($target_file);
$gifDecoder = new Decoder($gifStream);
$gifRenderer = new Renderer($gifDecoder);
$gifRenderer->start(function (FrameRenderedEvent $event) {
imagepng($event->renderedFrame, DIR . "/../gif_render/frame{$event->frameIndex}.png");
});
and how to change png filepath and filename(here is gif_render/frame ....png).
then create png, how know png count?

It is creating some really distorted images on few gifs.
Try converting this one:

While if we convert it using https://github.com/Sybio/GifFrameExtractor than there is no problem.

I want to create a gif, but the use of the library with this framework has been extended to me, is there any experience?

I have added the file package in the code igniter library folder, creating the function intact in this way for example
$ this-> load-> library ('Color');
$ this-> load-> library ('Encoder');
$ this-> load-> library ('Frame');
$ this-> load-> library ('/ IO / FileStream');

But at the time of mail the function throws me

An Error Was Encountered

Non-existent class: Color

PHP can be configured how it reads files, regarding \r\n.

MemoryStream.php should always use fopen with 'b' included in the method strings to ensure this doesn't happen.

There is a bug here:

See here for correct logic: https://github.com/lunakid/AnimGif/blob/master/src/GifCreator/AnimGif.php#L361

This causes gifs to be corrupted in certain situations

Remove reading first 6 bytes in readHeader():
$this->stream->seek(6); // GIF89a or GIF87a

With some images this library does not work. It does not throw any error, but gif image crashes. This happens when first frame has only a few colors (e.g. black and white image or blank one). I ended up by using this lib instead https://github.com/Intervention/gif