TrollflixDevelopers

Thumbnails

Pick a frame, upload your own image, or let Trollflix choose.

You have three options. Send at most one of the fields.

Send thumbnail_time as HH:MM:SS. Trollflix cuts that frame from your video.

-F "thumbnail_time=00:00:03"

Send the image as a thumbnail file.

  • JPG, PNG, WEBP, GIF, BMP or TIFF
  • at least 500×300 px, at most 5 MB
  • 16:9 (for example 1280×720) looks best everywhere

If the image is itself a frame of the video that you exported, also send thumbnail_source=slider. Trollflix may then enhance it automatically. Without it, your image is treated as artwork and never modified.

Send neither field. Trollflix generates a thumbnail from the video.

If both thumbnail and thumbnail_time are sent, the image wins.