| The imported video does not play | Codec or browser decoding limitation | Try a source in a widely supported codec/container and open it in a current desktop browser. |
| Video format is rejected | Unsupported input file or incompatible content | Check that the file is a valid video and try a documented input format. |
| Delogo leaves a blurry rectangle | Border interpolation cannot recreate complex hidden detail | Shrink the selected area, use a clean border or switch to blur, cover or crop. |
| The entire video looks softer after export | Lossy re-encoding or low selected output quality | Try a higher quality setting and bitrate; compare the exported file with the original. |
| Watermark appears in some frames | The overlay changes position or the region is too small | Scrub the timeline, adjust the region or edit shorter segments separately. |
| Private text can still be read through blur | Obscuring strength is too low | Use stronger pixelation or a solid cover and review every frame. |
| Crop removed important content | Frame edges were trimmed too aggressively | Undo and choose a smaller crop or use another cleanup method. |
| Audio is missing | Mute was selected or audio encoding was unsupported | Review the audio export option and test a new render. |
| Audio and video are out of sync | Transcoding or source timestamp issue | Export a short test with different compatible settings and verify in a second player. |
| Export fails on a long file | Device memory or CPU limits | Trim the video, downscale where acceptable, close other intensive tabs and retry. |
| FFmpeg engine fails to load | Network or browser configuration blocks WebAssembly assets | Check connection for the initial load and try a current supported browser. |
| Offline mode does not work | Engine or page assets are not cached or cache was cleared | Reload online and let the required processing assets finish initializing. |
| Saved regions exist but video is gone | Only project settings are retained | Select the original local source video again before rendering. |
| Batch settings miss one logo | Source clips use different dimensions or positions | Inspect each file and adjust regions before final export. |
| Browser becomes slow | High-resolution decoding and processing use significant RAM | Close unnecessary tabs, choose a smaller test segment or move to a stronger device. |
| Before/after preview differs from final export | Canvas preview and full codec rendering have different stages | Review the downloaded file and adjust cleanup/output settings if needed. |
| Pixelated patch looks too obvious | Pixelate is deliberate visual redaction | Use delogo only when authorized and appropriate, or accept the visibly redacted result. |
| Sharpened edges show halos | Sharpening strength is excessive | Reduce sharpening and compare fine details at normal viewing size. |
| Denoise makes faces look waxy | Texture smoothing is too strong | Lower denoise intensity or turn it off. |
| Video ends earlier than expected | Trim out point was set incorrectly | Check the timeline range before exporting again. |
| Output aspect ratio changed | Crop or resolution settings modified the frame | Restore appropriate crop and export settings for your destination. |
| MOV or WebM cannot be played | Playback software lacks codec support | Test MP4 or a compatible player and export preset. |
| Large watermark will not disappear naturally | Too much original scene content is hidden | Use a visible blur or cover rather than promising invisible reconstruction. |
| No download appears | Browser blocked or interrupted file save | Check download permissions and available storage, then retry a short render. |