When you want to edit videos before uploading them to Youtube for example, you can use Davinci Resolve 15, a powerful editing software that can be used free of charge. (The download link is at the bottom of the page below.)
When I uploaded a movie to youtube after editing it with DaVinci Resolve, I found an issue and I would like to share the way i solved it. The issue was that I wanted to export a video with a specified resolution, but there was a case where black bands would appear at the top and bottom of the output video as shown below.
調べた結果、プロジェクトセッティングの解像度の設定が適切でなかったのが原因でした。 I noticed that the resolution setting in the project settings was not correct.
解決方法と手順を下記に記します。 ※今回は問題を再現する為にイレギュラーな解像度(2048×1023)のイメージを利用しています。 Here is the solution I found. ※I used an image with an irregular resolution (2048×1023) to reproduce the issue.
1.タイムラインに配置されているフッテージ素材の解像度を確認します。 Check the resolution of the footage material placed on the timeline.
2.File>Project Setting…を開きプロジェクトの解像度を設定します。 File>Project Setting… and set the resolution of the project.