What is your operating system?
Windows 10 x64
What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
I’m having trouble removing letterboxing from a video. Goal is to apply some other filters then export the result at the original resolution, but without the letterboxing. For preservation of maximum detail, I don’t want any re-scaling (1:1 pixels from input to output). When I am editing, SC is giving me a small black band on the bottom of the preview window. When I export with x264 lossless, that black band is covering the bottom 4px of the video.
My source video is 1920x1080 with 130px of padding top and bottom. I set a custom video mode of 1920x820 resolution and 1920x820 aspect ratio, which are the dimensions of the actual content of the video. Size, Position & Rotate filter to set 100% zoom and position it at 0,-130. In theory(?), my content covers the full extents. Actual result, SC is covering up some of the content in both the preview and export.
I made a dummy video to demonstrate. Intentionally ugly color scheme. The letterboxing I want to remove is green (130px top and bottom); the content I want to keep is yellow (1920x820, centered top-to-bottom). See attached screen shot and files. Also is a sample export using x264 lossless that shows the black bar at the bottom. If you make the y-coordinate of the Size, Position & Rotate filter higher or lower, you can the green bands from the source to show up at the top or bottom of the preview window, but the black bar never goes away.
1920x820 Letterbox.zip (83.9 KB)