can't change thumbnail images on my mp4 video files

2009年3月14日 — How to choose your own video thumbnails in Mac OS X with QT · Open the video file in QuickTime and navigate to any frame of your choice. · Once ...

2020年6月11日 — Go to a file, click on it, select info and then slide my chosen picture over the small icon on the top left of the info section and that would change the image.

2024年3月7日 — Select Video, choose Edit Mode, move to favorite frame--- then go to Menu>Image>Make Poster Frame.

2023年7月2日 — I want to know if I can change the thumbnail that displays in finder? Or can I bake the thumbnail in at the exporting/sharing level within Final Cut Pro?

2024年6月18日 — You can create a thumbnail file on your own, or you can use Biteable's thumbnail feature to select a thumbnail and download the jpeg file.

2023年2月25日 — Click on the settings icon on the right side of the video control bar and select Set Poster Frame from the pop-up menu.

2018年11月9日 — Open file in Quicktime Player > Stop at screen you want to capture > Cmd+C > Close Quicktime Player. In Finder rt-click on file ...