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Why black bars remain after changing video aspect ratio

Check padding and bars already present in the source before centre-cropping a video, and inspect people, captions and logos throughout the result.

By FileMyLove Team1 min read

A 9:16 output can still contain black bars. First check whether you selected padding, and whether the source already contained bars. Changing the output shape alone is not an automatic black-bar removal operation.

Identify where the space comes from

Mediabunny documents that contain fitting preserves the full image and its proportions, which can leave letterboxing. FileMyLove uses this approach in the padding mode of change video aspect ratio.

Situation Our suggested check
Bars appear after padding Compare the source and decide whether losing picture edges is acceptable
Bars already belong to the source image Look for an earlier export without them
Space appears only in one player Compare another player and distinguish the picture from the player's surrounding area

Embedded black pixels are treated as part of the image. The tool has no automatic bar detector, so its preset ratio may not remove those pixels precisely.

Crop only when the lost edges are acceptable

Crop mode uses a centred rectangle with the chosen ratio. It does not track a face or move with a speaker. A subject near the side or captions near the bottom may be cut off even if the frame looks fuller.

Start from the complete source. Choose crop when the important content stays inside the remaining region, or padding when retaining the whole picture matters. For an adjustable crop position or a crop that changes during the clip, use an editor with those controls.

Review the whole clip

  1. Inspect the source before conversion.
  2. Choose the ratio and fitting mode.
  3. Download and open the result.
  4. Check the beginning, middle and end, especially when subjects move.
  5. Check captions, logos and other essential information.

If a crop is wrong, return to the original. Padding a previously cropped copy cannot restore removed content. See the vertical video guide for the broader workflow. FileMyLove processes local files in your browser without uploading them.