Image Overlay

Hybrik can overlay an image into your target video. This can be done to apply a “bug” to an entire video or to apply a visual watermark over a piece of content.

Usage

You can read the full documentation for the image_overlay filter in our API Docs; this tutorial will walk through a couple of examples.

The image_overlay filter can be applied to individual targets within a transcode task, or it can be enabled in the source_pipeline so that it applies to multiple targets.

Let’s look at an example of the filter. You’ll notice that the image path is provided directly in the filter; you do not need to supply the image in the source of your job. The image at the top of this page was generated with these settings:

"filters": [ 
    {
        "kind": "image_overlay",
        "payload": {
            "image_file": {
                "storage_provider": "s3",
                "url": "s3://my_bucket/my_image.png"
            },
            "opacity": 1,
            "x": 0,
            "y": 0,
            "height": "video_h/4",
            "start_sec": 10,
            "fadein_duration_sec": 1,
            "duration_sec": 5,
            "fadeout_duration_sec": 1
        }
    }
] 

Here’s how he parameters break down:

• "opacity": 1
  • this is the opacity of the overlaid image where 1 is 100% and 0 is 0%; 50% would be 0.5
• "x": 0
  • align the overlay to the left-most pixel of the video frame
• "y": 0
  • align the overlay to the top-most pixel of the video frame
• "height": "video_h/4"
  • scale the image’s height to 25% of the video frame’s height
• "start_sec": 10
  • start displaying the overlay 10 seconds into the video
• "fadein_duration_sec": 1
  • fade in from 0% opacity to 100% opacity over the course of 1 second, beginning at the start_sec
• "duration_sec": 5
  • show the image on-screen for 5 seconds. This parameter is inclusive of fadein_duration_sec and fadeout_duration_sec. Fades do not extend the duration
• "fadeout_duration_sec": 1
  • fade out from full opacity to 0% over the course of 1 second

Centered Image

Let’s look at a second example where we center the image:

{
    "kind": "image_overlay",
    "payload": {
        "image_file": {
            "storage_provider": "s3",
            "url": "s3://my_bucket/my_image.png"
        },
        "opacity": 0.75,
        "x": "(video_w-overlay_w)/2",
        "y": "(video_h-overlay_h)/2",
        "height": "video_h/3",
        "start_sec": 25,
        "fadein_duration_sec": 1,
        "duration_sec": 5,
        "fadeout_duration_sec": 1
    }
}

The parameters are nearly the same as our first example but we are using some FFMPEG-style positioning. The x and y parameters will center the image and the height parameter scales the image’s height to 1/3 of the video’s height. The opacity is set to 75% so that the image is not fully opaque.

Multiple image_overlays

It is possible to combine multiple image_overlay filters in the same Hybrik job. See the example job linked below for the entire workflow.

Example

• Double Image Overlay Job