A media file filled with slanted lines on the timeline means that KineMaster is unable to locate the image or video. This happens when the image or video is moved to another folder, deleted, or renamed.
If you try to preview a project with a missing file or save it as a video, an error message will alert you that some media files in the project are missing.
You can fix projects with this error by doing one of the following:
* Locate the video or image you added into your project and put the file back in its original location
* Replace the missing file with another media file by tapping the Replace Media button
* Delete the missing file from the project
After doing any one of these things, you will be able to preview your project and save it as a video.