DAM provides a powerful and flexible API that supports various video-related operations. Whether you need to transcode videos into different formats, convert between video file types, compress large files, trim videos or combine multiple clips, Video API can take care of it.

The following subpages contain additional information for the available operations related to video management, including their typical use cases, detailed explanations, usage examples and links to the relevant API docs, which allow you to integrate these capabilities seamlessly into your applications and workflows.

DAM support 2 methods for optimizing and editing videos before delivery.

Depending on the use case, either or both methods can be useful.

DAM integrates image, video and static file optimizers to dynamically transform and compress DAM and externally-hosted media assets. Delivery is then accelerated over multi-CDN all around the world.

Overview

Video transcoding is an integral part of our service, designed to provide seamless and efficient transcoding capabilities. It specializes in converting input videos into adaptive streaming formats, such as HTTP Live Streaming (HLS) and Dynamic Adaptive Streaming over HTTP (DASH). With support for various input file formats and target resolutions, optimal video delivery is guaranteed across multiple devices and network conditions.

Visit the following links to learn more about adaptive video streaming over HTTP:

The process can be summarized in three simple steps:

1. Upload of the origin video file to Filerobot.

2. Transcoding into chunks with support for multiple target resolutions.

3. Generation of the playlist file (.mpd for DASH and .m3u8 for HLS) that provides the necessary information for the video player to retrieve and play the video segments in a specific order and format.

Typical use cases

By leveraging video transcoding for adaptive streaming, you gain access to the following:

• Multi-device compatibility - With adaptive streaming formats like HLS and DASH, the videos become compatible with a wide range of devices, including smartphones, tablets, smart TVs, and desktop computers. This broad compatibility ensures that the content reaches a larger audience.

• Improved user experience - Adaptive streaming adjusts the video quality dynamically, based on the viewer's available bandwidth. This results in reduced buffering times, faster start-up and uninterrupted playback, enhancing the overall user experience.

• Bandwidth optimization - Our service efficiently compresses and transcodes videos, reducing the file size without compromising the visual quality. This optimization helps to minimize bandwidth consumption, allowing smoother playback even on limited network connections.

• Scalability and flexibility - Support for large volumes of video transcoding requests as well as a wide range of input file formats and target resolutions, thus ensuring scalability and providing flexibility in adapting to specific requirements.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input video

Request body

[
    {
        "url":"https://www.pexels.com/download/video/16343098", 
        "video_protocols": "hls"
    }
]

API response

{
    "status": "ok",
    "version": 2.11,
    "result": [
        {
            "uuid": "e7777629-34fd-4088-9541-c705dc599b10",
            "url": "https://www.pexels.com/download/video/16343098",
            "sha1": "dfec29eb2d9d5234e4ed5b70cebd4da00f721d26",
            "transcoded": [
                {
                    "resolution": "auto",
                    "playlists": [
                        "https://fbmjmuoeb.filerobot.com/gDOla_16343098/hls/video.m3u8"
                    ]
                }
            ],
            "progress": "https://api.filerobot.com/fbmjmuoeb/v4/video-status/ZXUtb3YtNzA2LWdyYTIuZWxhc3RpYy11cGxvYWRlci5haXJzdG9yZS5zY2FsM2ZsM3guY29tOjg3MzI__e7777629-34fd-4088-9541-c705dc599b10"
        }
    ]
}

Overview

The Video compression service provides a way to modify input videos by changing their bitrate and resolution. With support for multiple input formats and the flexibility to specify target resolution and bitrate using either concrete numeric values or predefined strings for typical uses, customers can optimize their video content for various devices and use cases.

A wide range of input video formats are supported, enabling video compression regardless of the original format and ensuring utilization across different platforms, devices, and playback environments.

The ability to specify target resolution and bitrate in several ways offers great flexibility. Videos can be easily adapted for different devices, screen sizes and network conditions, optimizing the viewing experience for their audience.

By converting videos to target resolutions and bitrates suitable for specific types of devices (e.g., mobile, tablet, desktop), the service ensures optimal playback performance and user experience. The delivered videos are tailored to the capabilities and display characteristics of different devices.

Typical use cases

Video compression can be used in the following use cases:

• Multi-device content delivery - If video content is distributed across different platforms and devices, the videos can be adapted to the specific resolutions and bitrates required, ensuring the content is optimally displayed and performs well regardless of the specific platform.

• Video advertisements - Video ads can be converted and optimized for various advertising channels and ad placements, such as mobile ads, in-app ads, desktop ads, etc.

• Responsive web design - Videos can be adjusted to match the breakpoints in a responsive design, which guarantees that they are appropriately displayed and offers a consistent user experience across different screen sizes.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input video

Request body

[
    {
        "url":"https://www.pexels.com/download/video/2231485/?fps=23.976&h=720&w=1280", 
        "video_resolutions":["200", "400", "600", "mobile"]
    }
]

API response

{
    "status": "ok",
    "version": 2.11,
    "result": [
        {
            "uuid": "e3abd370-a587-4048-92c6-1f4a168ff374",
            "url": "https://www.pexels.com/download/video/2231485/?fps=23.976&h=720&w=1280",
            "compressed": [
                "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/compressed_videos/hnlCJ_/_200p_500k_compressed.mp4",
                "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/compressed_videos/hnlCJ_/_400p_500k_compressed.mp4",
                "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/compressed_videos/hnlCJ_/_600p_500k_compressed.mp4",
                "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/compressed_videos/hnlCJ_/_360p_500k_compressed.mp4"
            ],
            "sha1": "91aaadd5f7c0f5dc279ab33bc3df4f031b5d1e9c",
            "progress": "https://api.filerobot.com/fbmjmuoeb/v4/video-status/ZXUtb3YtNzA2LWdyYTIuZWxhc3RpYy11cGxvYWRlci5haXJzdG9yZS5zY2FsM2ZsM3guY29tOjg3MzI__e3abd370-a587-4048-92c6-1f4a168ff374"
        }
    ]
}

Overview

Chapter generation offers a simple solution for generating .vtt (WebVTT) files with desired chapter times. WebVTT (Web Video Text Tracks) is a subtitle and caption file format widely used for displaying timed text in HTML5 videos. It provides a standardized format for creating text-based content such as captions, subtitles and descriptive metadata, allowing synchronized display with audiovisual media.

In addition to generating a .vtt file, you have the option to embed chapter information directly into the video metadata. This process involves modifying the metadata tags of the video file to include the chapter markers. Embedding the chapter information ensures that the chapters remain intact even when the video is distributed or played on different platforms.

With this service, you can enhance the accessibility and user experience of your videos by providing interactive chapter navigation.

Typical use cases

This service can be valuable for a plethora of use cases, mainly:

• Improving the user experience - Adding chapter markers to your videos allows viewers to navigate through the content more efficiently. Users can quickly jump to specific sections, facilitating easier content consumption and ensuring a more engaging viewing experience, especially for longer video content.

• Enhancing accessibility - Incorporating chapter markers enables better accessibility for individuals with disabilities, such as visual impairments or cognitive challenges. Screen readers and assistive technologies can utilize the chapter information to help users navigate the video and access specific sections.

• Content organization - Chapters provide a convenient way to organize and structure video content. By generating .vtt files with desired chapter times, lengthy videos can be broken down into logical sections, making it easier for viewers to find and consume the content that is most relevant to them.

• Chapter customization - The chapter times can be defined according to specific user requirements. Customers have control over the timing and granularity of chapters, ensuring they align with the natural breakpoints or key moments within their videos.

• Content discovery - Adding chapters to recorded webinars or presentations enables participants to revisit specific segments and key points. This improves the usability of recorded events and enhances content discoverability.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input video

Request body

[
    {
        "url": "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/combined_videos/QFtsC/16343098_2231485_combined.mp4",
        "chapters": [
            {
                "title": "car",
                "start_time": "00:00:00"
            },
            {
                "title": "beach",
                "start_time": "00:00:08"
            }
        ]
    }
]

API response

{
    "status": "ok",
    "version": 2.11,
    "result": [
        {
            "uuid": "58c45b71-775e-401d-b6e2-7322a069ba62",
            "url": "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/combined_videos/QFtsC/16343098_2231485_combined.mp4",
            "chapters": "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/chapters_videos/mUndc_16343098_2231485_combined/16343098_2231485_combined_chapters.mp4",
            "vtt": "https://fbmjmuoeb.filerobot.com/https://filerobot.s3.eu-west-3.amazonaws.com/fbmjmuoeb/chapters_videos/mUndc_16343098_2231485_combined/16343098_2231485_combined_vtt.vtt",
            "sha1": "6f83b865731dbe193cbc4f885a0cffb87b92153b",
            "progress": "https://api.filerobot.com/fbmjmuoeb/v4/video-status/ZXUtb3YtNzA2LWdyYTIuZWxhc3RpYy11cGxvYWRlci5haXJzdG9yZS5zY2FsM2ZsM3guY29tOjg3MzI__58c45b71-775e-401d-b6e2-7322a069ba62"
        }
    ]
}

VTT file

WEBVTT

1
00:00:00.000 --> 00:00:07.999
car

2
00:00:08.000 --> 00:00:16.000
beach

Video with chapters demo

Overview

The video conversion capabilities that we offer are designed to convert input videos into different formats, providing flexibility and compatibility for a wide range of applications and devices. Various input file formats are supported to ensure effortless conversion that meet any specific requirements.

By leveraging this feature, customers can gain access to versatile video conversion capabilities that enhance compatibility, accessibility and workflow efficiency, thus ensuring the video content reaches a wider audience while maintaining its quality and integrity.

Typical use cases

This service caters to various use cases, including but not limited to:

• Cross-platform compatibility - It ensures that the videos are suitable for distribution across different platforms.

• Device-specific optimization - The videos can be better optimized for playback on specific devices, such as smartphones, tablets, smart TVs, etc. This makes the viewing experience tailored to each device's capabilities.

• Archiving and preservation - The process of archiving and preserving videos can be greatly improved using formats deigned for long-term storage, thus ensuring accessibility and longevity for future use.

• Content repurposing - Existing video content can be repurposed for different purposes, such as promotional clips, trailers or snippets for social media marketing campaigns. The videos are adapted to various formats and platforms, increasing reach and engagement.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input video

Request body

API response

doc_page=X

When you provide a link to a PDF file, the first page is converted to an image and delivered via CDN. You can use all available , , capabilities and parameters. To convert a specific page of the PDF document, use the doc_page=X parameter.

process=minify-css process=minify-js

Filerobot supports on-the-fly optimization of CSS and JS content to further facilitate faster loading of your website or web application.

Examples

(152 kB minified vs. 192 kB original)

(111 kB minified vs. 219 kB original)

Overview

The video trimming service provides a seamless solution for trimming video files based on provided time intervals. It allows you to specify start and end times to extract specific sections from the input video, which are then joined together to create a new consolidated video file.

By leveraging video trimming, customers gain precise control over their video content, extracting specific sections and then joining them into merged video files. Whether they need to compile promotional videos, create social media content or produce video highlights, our service empowers them to streamline their video management process, deliver engaging content and create captivating video experiences for their audience.

Typical use cases

This service can prove beneficial for multiple use cases, such as:

• Content compilation - Specific sections from multiple source videos can be extracted and joined together to create compilations and highlight reels. This is valuable for creating promotional materials and recaps that showcase the best moments from various sources.

• Advertisement campaigns - Sections from longer videos can be extracted to create concise advertisement videos. This ensures efficient delivery within potential time constraints.

• Video previews - The most enticing sections of long videos can be extracted to create engaging previews, thus generating excitement and encouraging viewers to watch the complete video.

• Social media content - Videos can be modified to meet any specific duration or content requirements for a given social media platform, leading to videos that are optimized for social media sharing and ensuring maximum engagement.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input video

Request body

API response

Output video

Overview

The Video combining service offers a seamless solution for merging two video files into a single cohesive video. It intelligently combines the videos while considering resolution and frame rate to maintain the best possible quality. The result file starts with the first input video and continues with the second one. As always, multiple input formats are supported.

Resolution considerations are handled gracefully when merging videos. By adopting the lower resolution of the two input videos, we prevent upscaling and maintain the original quality of the lower resolution video, ensuring optimal visual integrity in the final combined clip.

The frame rate of the result video is determined by adopting the highest frame rate from the two inputs. This ensures that the final combined clip maintains the smoothness and consistency of motion.

Typical use cases

Merging input videos can be useful in multiple use cases:

• Video compilations - Multiple video clips can be effortlessly compiled into a single montage, useful for creating highlights and compilations for various purposes such as marketing, promotions or social media content.

• Advertisement creation - Different video segments can be combined into a single cohesive advertisement, ensuring a seamless viewing experience, effective storytelling or brand messaging.

• Workflow streamlining - Combining videos into a single file simplifies the video management workflow. It allows for easier organization, sharing, and distribution of video content, reducing the need for handling multiple video files separately.

• Viewing experience enhancement - Merging two videos into one can provide uninterrupted viewing experience by eliminating the need for viewers to manually switch between separate video files.

API endpoints

Information about the specific API endpoints is available in an always up-to-date documentation, that can be accessed via the following link:

There, you can find detailed information about the API endpoints, together with all required request parameters, so you know how to interact with them.

Examples

Input videos

Request body

API response

Output video

DAM offers on-the-fly video processing with delivery via CDN using the DAM URL for seamless integration. This feature is suited for short clips for websites and web applications such as hero videos or product videos.

Input files are limited to 500 MB and compressed videos are limited to 4k resolution and duration of no more than 1 minute. If your videos exceed those limits, your use case probably does not fall into the scope of this feature and you should consider using and .

Available parameters

//token.filerobot.com/folder/origin_video.mp4?w=600&format=auto

Examples

Crops the image to specified dimensions (width and height) while keeping proportions and delivers the resulting image via CDN.

func=crop

Examples

Gravity

Specifies which part of the image you wish to keep while cropping. If you omit the gravity option, central cropping is performed.

gravity=X

Available gravity values

Examples

To load fast on any device around the world, images need to be resized, cropped and compressed. No need to push a 20-megapixel image to deliver a 1170px wide thumbnail on a smartphone. DAM will manipulate and transform your images dynamically and optimize for web delivery, thus saving you days in image management.

DAM's image manipulation and transformation features rely on DMO (Dynamic media optimization), a standalone media optimization CDN developed by Scaleflex.

The basics

Everything starts with the basic URL format of a DAM URL:

DAM automatically compresses these images into the most optimal delivery format (WebP, AVIF, ...) based on the user's device and context and accelerates them over multiple Content Delivery Networks from tier 1 CDN providers such as Akamai, Fastly, AWS Cloudfront and CDNetworks.

Examples

func=proxy

DAM offers you the option to deliver any file, including non-processable files - static content like JS or CSS files, via our Content Delivery Network.

By default, all URLs are regarded as images. To deliver a non-image file, you have to use the func=proxy option:

DMO can automatically use the proxy function for all files which don't have an image file extension. This however will require all your images to have proper file extensions. If you prefer this behaviour, you can switch it on in your Admin Console ( Settings/ DMO -> Static content / Enable static Content acceleration):

Resizes the image to a specified width or height (in pixels) while keeping proportions and delivers the resulting image via CDN.

width | w

height | h

Examples

When resizing with width or height operation, Filerobot either reduces or increases the dimensions of the image to keep proportions. To prevent the image from getting resized to a bigger size than the original, use the org_if_sml operation.

org_if_sml=1

Examples

Resizing operations enable the dynamic generation of image transformations to meet various web delivery use cases. Operations focus on the image size while allow to modify the image itself.

Available operations

Resize functions

When you specify both width and height, original image proportions can be either ignored or maintained. Also, you may choose to add padding to the image to fill the blank space.

Filerobot supports the following resize function (operation func).

Crop

Fit

Cropfit

Bound

Cover

Finds the most prominent face in the image and crops it to specified dimension provided with the width and height parameters. If you however provide only one dimension, the other dimension will be chosen automatically to keep the aspect ratio of the face.

func=face

Examples

Face margin

Sets margins around the face. You can set equal margins with face_margin=X or separate horizontal and vertical margins (face_margin=W,H).

face_margin=X|W,H

Examples

Crops out the topmost part of an image if it contains a face.

To control the margin when cropping the face out, you can use the face_margin=Y operation where Y is a percentage of the face height. Its default value is 20. You can also use negative numbers if you would like to keep part of the face.

func=facehide

Examples

Chooses the most important image features and objects and sets the focal point on them when cropping.

gravity=smart

gravity=auto

gravity=face

Smart gravity

Sets the crop focal point on the people in the image or on the most prominent featues if no faces are detected. Useful for creating thumbnails from images with different aspect ratios.

Examples

Automatic gravity (legacy)

If you prefer to use the legacy automatic crop, just set gravity operation to auto.

Examples

Face gravity

When using gravity=face, all images with one dominant face are focused on this face upon cropping. If there are many or no faces in the image, gravity falls back to auto.

Examples

Resizes the image to fit into a specified width and height box, adds padding (image or solid color) to keep proportions, and delivers the resulting image via CDN.

func=fit

The padding can be customised using the following additional operations:

Gravity

Examples

Allows to crop an image by defining the coordinates of the crop focal point. It is useful when you want to crop images where the coordinates of the point of interest are already known.

To set the coordinates of the focal point, use the gravity=X,Y operation where X and Y are the coordinates of the focal point (in pixels). Alternatively, you can set the coordinates as a percentage of the original image - gravity=Xp,Yp or gravity=xc,yc, where X,Y=0..100 and x,y=0..1.

gravity=X,Y

gravity=Xp,Yp|xc,yc

Examples

Original image: /docs/castle.jpg?w=1000

Allows to crop an image by providing the cropping area. It is useful when you want to crop a specific part of the image. To set the coordinates of the crop rectangle, use the tl_px and br_px operations.

tl_px=X1,Y1

br_px=X2,Y2

Examples

Original image: /docs/kids.jpg

Combining positionable crop with resize modes

Positionable crop can be combined with all available resize functions - width/height, crop, fit, bound or cover. This operation is performed after the positionable crop.

Examples

Performs either or operation depending on the origin image and the desired transformation dimensions.

If the desired image is smaller than the original, the result is cropped to achieve the desired dimensions.

func=cropfit

Examples

Using cropfit with trim

If you include the operation in the URL, the image will be trimmed first (if possible) and then either cropped or fitted to the desired size.

Examples

Resizes to a given width and height box and keeps proportions. Similar to but without adding padding. Delivers the resulting image via CDN.

func=bound

Examples

Resizes an image while bounding the smaller dimension to the desired width or height while keeping proportions. Delivers the resulting image via CDN.

func=boundmin

Examples

Resizes the image to a specified width and height without keeping original proportions and delivers the resulting image via CDN.

func=cover

Examples

Allows you to deliver the right image dimensions according to a defined device pixel ratio. This operation can help with conversion between device-independent pixels and CSS (reference) pixels. Useful in responsive image solutions using the srcset html attribute. Allows positive values limited to 5.

dpr=X

Examples

Rotates the image by a specified angle, counterclockwise. You can use bg_color=X to set the background fill color if the rotation angle is not divisible by 90.

r=X

Examples

Removes any single-color padding around the image if present.

The parameter does not specify the amount of border or frame to trim but rather how aggressive the trim algorithm should be. A bigger value of the parameter (e.g. 25) will trim rather more than not enough. Typical values are between 0 and 10.

This allows you to use the same parameter values for all your images.

trim=X

Examples

Sets target aspect ratio or aspect ratio range when cropping. Aspect ratios can be set as decimal values (1.778) or ratios (16:9).

aspect_ratio=AR | ar=AR

aspect_ratio=AR1,AR2 | ar=AR1,AR2

Crop and resize

If you provide only one dimension parameter (width or height) and aspect_ratio, the other dimension will be calcualted. If you include both width and height in the URL, aspect_ratio is ignored.

Examples

Crop without resize

If you provide only aspect_ratio and no dimensions (width or height), the image will be cropped without resizing.

Examples

Aspect ratio range

You can spcify a range of aspect ratio, for example aspect_ratio=4:3,16:9. Images which fall within this range, will not be cropped. Useful to avoid very wide ot very tall images by cropping them to the closest aspect ratio.

Examples

Mirrors the image horizontally and/or vertically.

flip=h | flip=v | flip=hv

Examples

Rounds the corners of images with a radius of X pixels. If you wish to fill the cut corners with a specific colour, you can use the bg_color parameter.

radius=X

Examples

Filters allow you to modify images on-the-fly by applying different effects.

Available filters

Combining filters

To use more than one filter, you can either use separate parameters or concatenate them with commas into the f parameter:

To adjust the brightness, you can use the bright filter and set the desired adjustment value.

bright=X

Examples

To create a color overlay by using colorize=X[,Y], where X is the color of the overlay (hex value or color name) and Y is the opacity (Y=0..1, default 0.5).

colorize=X[,Y] | colourise=X[,Y]

Applies a pixelation effect to an image. You can set the desired block size in pixels. If the image is resized the filter is applied after resizing.

pixelate=X | pixellate=X

Examples

Applies Gaussian blur to the image. The parameter value (X) is the kernel size of the filter in pixels.

blur=X

Examples

To adjust the contrast, you can use the contrast filter and set the desired adjustment value.

contrast=X

Examples

DAM can place a watermark on top of your images if you want to protect them from copying, or tag them with a serial number or custom text. There are three types of watermarks - click on each one for more details.

Multiple watermarks

Basic syntax

You can overlay multiple watermarks by indexing the parameters in the URL wat[1]=1&wat[2]=1. The wat=1 parameter must be indexed and contain all watermarks to activate the feature.

All parameters without indices will be applied to all watermarks in the image.

?wat[1]=1&wat[2]=1&wat_scale[1]=50&wat_scale[2]=10&wat_opacity=0.5

In the above fragment, wat_opacity=0.5 will be applied to both watermarks.

Multiple watermark types

Combining multiple watermark types is also possible. Remember that the presense of wat_url=X parameter defines a dynamic watermark, wat_text=X defines a text watermark and the absence of either defines a static watermark.

?wat[1]=1&wat[2]=1&wat[3]=1&wat_url[2]=sample.li/Angular.png&wat_text[3]=text

In the above fragment, there are three watermarks. Watermark 2 is a dynamic watermark, watermark 3 is a text watermark and watermark 1 is a static one.

The dynamic watermark function allows you to specify the watermark image in the Filerobot URL. This way, different watermarks can be used with different images.

Available parameters

Examples

If you need to tag an image or add a reference number as an overlay, use the text watermark function.

Available parameters

Examples

You can change the compression (output format and quality) of your image by using compression filters. You can use the compression filters alongside and .

You can of course force a specific output format(s). More details can be found in the image formats section.

JPEG compression

The JPEG compression format is suitable for delivering photographic images with minimal quality loss and high compression rate. You can either choose the compression factor yourself or use Optipress - our Machine Learning based algorithm, which will choose the best way to reduce JPEG file size minimising perceptual quality loss.

Available parameters

Examples

PNG format

This format is a good choice for non-photographic images - flowcharts, graphs, screenshots, logos, etc. PNG also supports transparency.

Available parameters

Lossy PNG compression

While the PNG format offers lossy compression only, Filerobot can optimize the image before compression by reducing the number of colors or adding slight dithering (while preserving edges). This method usually leads to smaller file sizes for images visually indistinguishable from the original ones.

You can activate this feature in the Asset Hub (Settings/Process/Images/Image compression):

Examples

WebP format

WebP is an image format maintained by Google and supported in certain browsers (mainly Chrome, Opera and on Chrome Android) which provides more aggressive compression techniques as JPG without noticeable quality degradation.

You can use the following parameters to control webp compression quality:

Examples

Deliver images in their original format

By default, Filerobot delivers the images as WebP, when the format is supported by the browser. If you would like to keep the format of the original image (when possible), you can use force_format=original.

This function will watermark selected images with the same watermark - an image set in the Asset Hub. This is useful for placing your company logo, name or other copyright information. If you would like to watermark different images with different watermarks, please refer to the section.

Step 1 - upload your watermark in the Asset Hub

Log in to your DAM and navigate to Settings / DMO -> Images / Watermark and upload your default watermark using the uploader.

Step 2 - start watermarking!

Available parameters

Use watermark

To activate the watermark function, you need to include the wat=1 parameter.

Watermark position

The wat_gravity option sets the position of the watermark (available values are east, northeast, north, northwest, west, southwest, south, southeast, and center/centre) and the wat_pad defines the offset of the watermark from the gravity position.

The padding can be defined in pixels (wat_pad=X[,Y]) or in percent of output size (wat_pad=Xp[,Yp]). The padding is applied after scaling the final image and then it is compressed (see Compression) and delivered via CDN.

Watermark size

The watermark can be scaled relative to the original watermark image (wat_scale=X[,Y]) or relative to the output image (wat_scale=Xp[,Yp]).

Examples

Different images compressed with the same compression parameters may result in different perceptive quality. Moreover, the same image in different sizes may require different compression strategy to achieve maximum size gain without visible quality loss.

To overcome this, you can use our Optipress JPEG compression algorithm.

• Optipress finds out the best JPG compression approach by analysing specific image features and current compression parameters.

• A Machine Learning model determines the best compression strategy for this image.

• Quality is then evaluated based on a simulation model of the Human Visual System to achieve optimum compression without perceptive quality deterioration.

By using Optipress, you can get the most of the JPEG compression format.

Usage

Examples

To adjust the color saturation, you can use the saturate=X filter and set the desired adjustment value (X= -100..100). Negative values will decrease color saturation while positive ones will increase it.

saturate=X

Examples

Desaturate

Using saturate=-100 will remove all color information and convert the image to grayscale.

Examples

Sharpening is a powerful tool to emphasise texture and details, especially on smaller images, e.g. thumbnails. Filerobot can apply an unsharp mask filter which will make your image look sharper. You can specify the filter radius (X) in pixels.

sharp=X

Examples