使用PIL保存动画GIF（保存的图像不动画）(Saving animated GIFs using PIL (image saved does not animate))

使用PIL保存动画GIF（保存的图像不动画）(Saving animated GIFs using PIL (image saved does not animate))

我有Apache2 + PIL + Django + X-sendfile。 我的问题是，当我保存动画GIF时，当我通过浏览器输出时，它不会“动画”。

这是我的代码，用于显示位于公共可访问目录之外的图像。

def raw(request,uuid): target = str(uuid).split('.')[:-1][0] image = Uploads.objects.get(uuid=target) path = image.path filepath = os.path.join(path,"%s.%s" % (image.uuid,image.ext)) response = HttpResponse(mimetype=mimetypes.guess_type(filepath)) response['Content-Disposition']='filename="%s"'\ %smart_str(image.filename) response["X-Sendfile"] = filepath response['Content-length'] = os.stat(filepath).st_size return response

UPDATE

事实证明它有效。 我的问题是当我尝试通过URL上传图像时。 它可能无法保存整个GIF？

def handle_url_file(request): """ Open a file from a URL. Split the file to get the filename and extension. Generate a random uuid using rand1() Then save the file. Return the UUID when successful. """ try: file = urllib.urlopen(request.POST['url']) randname = rand1(settings.RANDOM_ID_LENGTH) newfilename = request.POST['url'].split('/')[-1] ext = str(newfilename.split('.')[-1]).lower() im = cStringIO.StringIO(file.read()) # constructs a StringIO holding the image img = Image.open(im) filehash = checkhash(im) image = Uploads.objects.get(filehash=filehash) uuid = image.uuid return "%s" % (uuid) except Uploads.DoesNotExist: img.save(os.path.join(settings.UPLOAD_DIRECTORY,(("%s.%s")%(randname,ext)))) del img filesize = os.stat(os.path.join(settings.UPLOAD_DIRECTORY,(("%s.%s")%(randname,ext)))).st_size upload = Uploads( ip = request.META['REMOTE_ADDR'], filename = newfilename, uuid = randname, ext = ext, path = settings.UPLOAD_DIRECTORY, views = 1, bandwidth = filesize, source = request.POST['url'], size = filesize, filehash = filehash, ) upload.save() #return uuid return "%s" % (upload.uuid) except IOError, e: raise e

有任何想法吗？

谢谢！

Wenbert

I have Apache2 + PIL + Django + X-sendfile. My problem is that when I save an animated GIF, it won't "animate" when I output through the browser.

Here is my code to display the image located outside the public accessible directory.

def raw(request,uuid): target = str(uuid).split('.')[:-1][0] image = Uploads.objects.get(uuid=target) path = image.path filepath = os.path.join(path,"%s.%s" % (image.uuid,image.ext)) response = HttpResponse(mimetype=mimetypes.guess_type(filepath)) response['Content-Disposition']='filename="%s"'\ %smart_str(image.filename) response["X-Sendfile"] = filepath response['Content-length'] = os.stat(filepath).st_size return response

UPDATE

It turns out that it works. My problem is when I try to upload an image via URL. It probably doesn't save the entire GIF?

def handle_url_file(request): """ Open a file from a URL. Split the file to get the filename and extension. Generate a random uuid using rand1() Then save the file. Return the UUID when successful. """ try: file = urllib.urlopen(request.POST['url']) randname = rand1(settings.RANDOM_ID_LENGTH) newfilename = request.POST['url'].split('/')[-1] ext = str(newfilename.split('.')[-1]).lower() im = cStringIO.StringIO(file.read()) # constructs a StringIO holding the image img = Image.open(im) filehash = checkhash(im) image = Uploads.objects.get(filehash=filehash) uuid = image.uuid return "%s" % (uuid) except Uploads.DoesNotExist: img.save(os.path.join(settings.UPLOAD_DIRECTORY,(("%s.%s")%(randname,ext)))) del img filesize = os.stat(os.path.join(settings.UPLOAD_DIRECTORY,(("%s.%s")%(randname,ext)))).st_size upload = Uploads( ip = request.META['REMOTE_ADDR'], filename = newfilename, uuid = randname, ext = ext, path = settings.UPLOAD_DIRECTORY, views = 1, bandwidth = filesize, source = request.POST['url'], size = filesize, filehash = filehash, ) upload.save() #return uuid return "%s" % (upload.uuid) except IOError, e: raise e

Any ideas?

Thanks!

Wenbert

最满意答案

Image类来自何处以及Image.open是什么？

我的猜测是它对图像数据进行了一些消毒（这是一件好事），但只保存了Gif的第一帧。

编辑：

我确信这是PIL的一个问题。 关于GIF的PIL文档说：

PIL读取GIF87a和GIF89a版本的GIF文件格式。 该库写入了行程编码的GIF87a文件。

要验证，您可以将im的内容直接写入磁盘并与源映像进行比较。

Where does that Image class come from and what does Image.open do?

My guess is that it does some sanitizing of the image data (which is a good thing), but does only save the first frame of the Gif.

Edit:

I'm convinced this is an issue with PIL. The PIL documentation on GIF says:

PIL reads GIF87a and GIF89a versions of the GIF file format. The library writes run-length encoded GIF87a files.

To verify, you can write the contents of im directly to disk and compare with the source image.