When I change the resolution for a video to output, the video still takes a long time to export but the file size is very small (5 MB, expected a few hundred MB) and of course no video is shown during playback but the audio is played. Incidentally, the ‘disable video’ box is NOT checked.
I don’t know whether it’s relevant but I have crop, stabilize and size & position filters applied.
You changed the resolution, but DNxHD only supports fixed resolutions. We used to lock down this part of the UI when choosing some presets like this, but someone asked us to not do that, and there was a good reason… I am not recalling at the moment.
If you want something similar - slightly compressed but so-called visually lossless - then ProRes is a good choice especially if you need another tool to read it. Otherwise, if you ample disk space, look at the lossless category of presets.
With that said, I tested your resolution with ProRes, and in the log it complains “frame width needs to be multiple of 2.” I think a lot of codecs will give that complaint. For example:
[libx264 @ 00000000055bbf60] width not divisible by 2 (1315x795)