Go to the Browser and select the Effects tab. When you are going to change the video to widescreen in Final Cut Pro you may want to change all necessary clips in one swoop, so you can essentially highlight all of them and transfer the widescreen video effect onto all or do it onto a single clip and then copy and paste assets to each of the other ones afterwards. It is better to alter all videos with video effects after they are in the Final Cut Pro Timeline instead of anywhere else as the base video clips should always stay as they originally were. Start off by selecting the video you want to alter in the Timeline. Follow this quick and easy Final Cut Pro tutorial on how to convert standard definition video to widescreen. Final Cut Pro is an editing program that gives you a complete set of image controls and it also includes a feature that allows you to transfer your video footage to widescreen by using a video effects feature instead of difficult image processing. Things that are shot in 4:3 often look archaic and out of place, and even if you did shoot something in a native 4:3 you may be looking for a simple way to switch it over to widescreen when you are in your post-production process. This letterbox widescreen quickly became the expectation, and now HD televisions and broadcasts already come in this 16:9 aspect ratio. This meant that either a pan and scan editing technique had to chop off the sides of the film to show it in standard definition, or you had to have it in letterbox that appeared as black bars on the top and bottom. For many decades, televisions came only in the standard definition aspect ratio of 4:3, while films were shown theatrically at a widescreen aspect ratio of 16:9.

For the last ten to fifteen years there has been a gradual shift in the expectations of home video viewing.

Change aspect ratio in final cut pro