I have some DV footage 720x576 4x3ratio Lower Field and created a sequence which I matched with source.
I want to upload this to YouTube and I understand YouTube accepts 720p, in which I use the preset YouTube export (H.264 - YouTube HD 720p 25), which adds black bars to the sides and exports out at 1280x720 Progressive. This takes approx 3 hours to export for a 45min clip.
To speed up the export I tried preset, H264 - PAL DV Widescreen, set to Progressive. By default this uses 16:9 pixel ratio, it added bars to the sides and outputed 720x576. The export took 30minutes only, a lot quicker than the above option. When I play it back with VLC, the overall ratio is correct (i.e. black bars on sides) and picture looks fine, no obvious concerns. I uploaded this to YouTube and it appears fine also. But as I used frame resolution of 720 x 576. - Is there a problem that I havent yet discovered? Just want to be sure before I continue down this path. Thanks