An overlay input ends before the base recording

If an overlay ends before the base movie, its end-of-file behavior determines whether the image remains, disappears or shortens the composition. Choose that behavior deliberately in a local filtergraph and inspect the later picture. The website’s image-watermark tool uses a still image rather than an arbitrary second video clip.

Identify both input timelines and their role

The base movie and an overlay are separate sources. An animated overlay may contain only a few seconds while the underlying recording continues for minutes. A still PNG does not supply the same kind of moving timeline. Mixing those cases can explain why a local composite freezes an overlay or stops earlier than the intended delivery.

Inspect both sources before changing the composition. Establish which video is the base, which is the inserted contribution, and whether the overlay is meant to remain visible for the whole movie. Retain the unmodified sources and their versions so a later timing investigation does not depend on a flattened composite alone.

Choose behavior supported by the workflow

In a local FFmpeg overlay graph, examine the installed filter’s end-of-file and frame-repeat options. A requirement to preserve the entire base duration differs from a requirement to stop when the shortest input ends. Write the intended rule down before encoding, then choose the actual supported options that express it.

On this site, Add Image Watermark accepts the movie followed by an authorized PNG or JPEG. Use the file-order controls and displayed width setting to prepare that static image treatment. It does not expose a second-video overlay editor, arbitrary start/end animation intervals or custom filter options. If you need a moving overlay, use an appropriate local editing workflow rather than upload unsupported inputs.

Verify the composition beyond the overlay endpoint

Watch a point just before and just after the shorter source’s last frame, then the end of the base recording. Confirm whether the overlay’s continued appearance is intended and whether the underlying picture and sound remain intact. A plausible first frame cannot approve the later timeline.

If a local export is unexpectedly short, inspect whether a shortest-input condition caused early termination. If the inserted picture remains frozen when it should disappear, revisit frame-repeat and EOF behavior instead of assuming the base movie contains that frozen content. Also inspect position and transparency against changing scenes; duration correctness alone does not establish a readable or appropriate watermark.

Worked example

A creator overlays a five-second animated badge on a one-minute tutorial in a local editor. The initial scene looks correct, but the badge’s last frame remains for the rest of the movie. The creator reviews the EOF rule and makes a new render that removes the badge after its intended interval, without truncating the tutorial.

Related guidance

Sources and verification

Reviewed 2026-10-12. Product behavior is limited to available source formats and provider access; it is not a promise that every public link works.