I'm making my holiday video and I usually add some title showing the name of the place. The problem is when I export the project to a file, when the titles appears in screen the quality gets lower while the title is showing, showing some saw-teeth and blur, when the title dissappears automatically the quality increase to the original one. The original files are Interlaced, upper field first. I usually export with the option "same as first video clip" but I tried so many options, doubling the bitrate, changing fields order, mpeg optimizer, two pass encode... and the same happens.
The only way this doesn't happen is if I export changing upper lower first to frame based. The point is that if I do that, maybe there is a little loss of quality, right?
What can I do for not lose quality? I need necessary convert it to progressive with frame based option? Will I lose quality of the whole video with it?
I uploaded the snapshots to show you what I mean https://ibb.co/mbbseT
