We use aspose slide to convert ppt/pptx files to png.
Recently, we used a pptx file for conversion and we noticed that there was a dotted line which was the part of orginal pptx was missing from the converted slide.
I used the latest version of Aspose.Slides for .NET v14.2.0 and I am unable to notice your mentioned issue in the generated PNG file. I have attached the PNG file for your reference. I would suggest you to download and try the latest version and let us know in case you face any issue. Also, following is the sample code I used to convert the PPTX file to PNG.
//Instantiate a Presentation class that represents the presentation file
using (Presentation pres = new Presentation("c:\\data\\Prezoni_Haran.pptx"))
{
foreach (ISlide sld in pres.Slides)
{
//Create a full scale image
Bitmap bmp = sld.GetThumbnail(1f, 1f);
//Save the image to disk in PNG format
bmp.Save("c:\\data\\Prezoni_Haran_Thumbnail_" + sld.SlideNumber + ".png",
System.Drawing.Imaging.ImageFormat.Png);
}
}
I am further checking your issue with respect to Aspose for Cloud API and will share my test results with you soon. However, could you please confirm how you are converting the PDF file to PNG file? Are you using Aspose for Cloud API for that as well?
I am able to reproduce the issue regarding missing dotted lines when PPTX is converted to PDF file. An issue has been registered in our issue tracking system with issue id: SAASSLIDES-133. You will be notified via this forum thread once the issue gets resolved.