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Aspose.Slides for Python via .NET 25.3 Release Notes

This page contains release notes for Aspose.Slides for Python via .NET 25.3

New Features and Enhancements

Key	Summary	Category	Related Documentation
SLIDESNET-44389	GetThumbnail method is locked in multi threads while converting slides to images	Enhancement	https://docs.aspose.com/slides/net/convert-powerpoint-to-png/
SLIDESNET-44846	Option to remove JavaScript when converting Presentation to HTML	Feature	https://docs.aspose.com/slides/net/convert-powerpoint/
SLIDESNET-44803	Implement a method for retrieving text based on column settings	Feature
SLIDESNET-44792	Extracting captions from videos	Feature	https://docs.aspose.com/slides/net/video-frame/
SLIDESNET-44815	Changing file links in presentations to relative	Investigation	https://docs.aspose.com/slides/net/chart-workbook/#set-external-workbook
SLIDESNET-44774	Add possibility to specify JPEG quality when saving image to JPEG in Modern API	Feature	https://docs.aspose.com/slides/net/modern-api/
SLIDESNET-44831	Implement support for the DisableFontLigatures property in IHtml5Options	Feature
SLIDESNET-44819	PptxReadException occurs when loading a PPTX file	Feature	https://docs.aspose.com/slides/net/open-presentation/

Other Improvements and Changes

Key	Summary	Category	Related Documentation
SLIDESPYNET-253	Use Aspose.Slides for Net 25.3 features	Enhancement	https://releases.aspose.com/slides/net/release-notes/2025/aspose-slides-for-net-25-3-release-notes/

Public API Changes

Added Support for VideoFrame Closed Captions

The Captions class and ICaptions interface have been added. They contain information about the closed captions, including the id, label, and data in WebVTT format. The CaptionsCollection class and ICaptionsCollection interface have been added for storing a collection of closed captions. The caption_tracks property has been added to the IVideoFrame interface and implemented in the VideoFrame class.

The following code sample demonstrates how to insert a new VideoFrame, add captions to it, and save the PowerPoint presentation:

import aspose.slides as slides

with slides.Presentation() as pres:
    with open("video.mp4", "rb") as f:
        video = pres.videos.add_video(f.read())
    video_frame = pres.slides[0].shapes.add_video_frame(0, 0, 100, 100, video)

    # Adds the new captions track from file
    video_frame.caption_tracks.add("New track", "track.vtt")

    pres.save("video with captions.pptx", slides.export.SaveFormat.PPTX)

This code sample demonstrates how to extract captions from a VideoFrame instance and save them to a file:

import aspose.slides as slides

with slides.Presentation("video with captions.pptx") as pres:
    for shape in pres.slides[0].shapes:
        if type(shape) is not slides.IVideoFrame:
            continue

        for caption_track in video_frame.captions_tracks:
            # Extracts the captions binary data and saves theme to the file
            with open(caption_track.caption_id + ".vtt", "wb") as f:
                f.write(caption_track.binary_data)

The following code sample demonstrates how to remove all captions from a VideoFrame and save the PowerPoint presentation:

import aspose.slides as slides

with slides.Presentation("video with captions.pptx") as pres:
    video_frame = pres.slides[0].shapes[0]

    # Removes all captions from the VideoFrame
    video_frame.caption_tracks.clear()

    pres.save("video without captions.pptx", slides.export.SaveFormat.PPTX)

Added New Property: IHtml5Options.disable_font_ligatures

The new property, disable_font_ligatures, has been added to the IHtml5Options interface and implemented in the Html5Options class. This property allows you to control text rendering during export by enabling or disabling ligatures.

The following code sample demonstrates how to use the disable_font_ligatures property to disable ligatures during export:

import aspose.slides as slides

with slides.Presentation("example.pptx") as pres:
    # Configure export options
    options = slides.export.Html5Options()
    # Disable ligatures in text rendering
    options.disable_font_ligatures = True
    # Export presentation to HTML5 with disabled ligatures
    pres.save("output.html", slides.export.SaveFormat.HTML5, options)

Added New Property: ISaveOptions.skip_java_script_links

The new property, skip_java_script_links, has been added to the ISaveOptions interface and implemented in the SaveOptions class. This property allows you to skip hyperlinks that contain JavaScript calls when saving a presentation.

The following code samples demonstrate how to save a PPTX presentation without hyperlinks containing JavaScript calls:

Saving to HTML:

with slides.Presentation("demo.pptx") as pres:
    options = slides.export.HtmlOptions()
    options.skip_java_script_links = True
    pres.save("result_without_JavaScript_links.html", slides.export.SaveFormat.HTML, options)

Saving to HTML5:

with slides.Presentation("demo.pptx") as pres:
    options = slides.export.Html5Options()
    options.skip_java_script_links = True
    pres.save("result_without_JavaScript_links.html", slides.export.SaveFormat.HTML5, options)

Saving to PDF:

with slides.Presentation("demo.pptx") as pres:
    options = slides.export.PdfOptions()
    options.skip_java_script_links = True
    pres.save("result_without_JavaScript_links.pdf", slides.export.SaveFormat.PDF, options)

Added New Method: ITextFrame.split_text_by_columns

The new method, split_text_by_columns(), has been added to the ITextFrame interface and implemented in the TextFrame class. This method splits the text content of the TextFrame into an array of strings, where each element corresponds to a separate text column within the frame.

The following code sample demonstrates how to use the split_text_by_columns() method:

import aspose.slides as slides

with slides.Presentation("example.pptx") as pres:
    # Get the first shape on the slide and cast it to ITextFrame
    text_frame = pres.slides[0].shapes[0]
    # Split the text frame content into columns
    columns_text = text_frame.split_text_by_columns()
    # Print each column's text to the console
    for column in columns_text:
        print(column)

Added New Class: InkActions

The InkActions class and IInkActions interface have been added. They represent graphical elements for ink actions. In this release, serialization, deserialization, and rendering of such elements have been implemented.

Added New Methods: IImage.save

Two new methods have been added to the IImage interface:

These methods have an additional quality parameter, which accepts values from 0 to 100 and allows controlling the quality of the saved image. This parameter only affects saving in the JPEG format.

The following code sample demonstrates how to save the first image in the presentation collection as a JPEG with varying quality:

import aspose.slides as slides
import io

with slides.Presentation("pres.pptx") as pres:
    image = pres.images[0].image

    # Saves the first image to the memory stream in JPEG format with quality 80.
    ms = io.BytesIO()
    image.save(ms, slides.ImageFormat.JPEG, 80)

    # Saves the first image to the file in JPEG format with high quality.
    image.save("image.jpg", slides.ImageFormat.JPEG, 100)