What Sequence did you edit the footage in/ ie...did it match? 1440 x 1080
The 1440 has a rectangular pixel. That is how it is 16:9.
Upscaling to 1920 probably does you no favors quality-wise!
My issue is similar; I have the company logo in a lower 3rd from after effects. The AE project is 1440 x 1080 using the animorphic 1.33 pixels. I import this into a sequence in premiere using the exact same settings, and when I go to export, the logo is stretched. the only way to make the logo look right is changing the export to square pixels but then my video has big black bars on left and right.
years ago, using CS3 master collection this wasn't an issue. what has changed now that I have CC? I know I'm not answering your question but there's a disconnect between my production planning and the adobe media encoder....
replying to myself; the only way I could fix this is to go into my after effects comp, "interpret footage" on the logo and change it to 1.0 square pixels while leaving it in an animporphic environment (1.333).
Once Exported from premiere it looks right. This is a quick fix for this project but I'll have to look into ways of shooting native 16;9, like a full 720p or something so I don't have to do this again.
I always match the entire project to the footage so this problem doesn't happen.
I have an after effects project dynamically linked to the project. I think that may be causing the problem somehow, although that is also a 1440 project.
Again, I had no problems before. I've done 10+ projects for this client with the same settings and am only now having problems.
I never recommend shooting in 1440, but that is what they wanted for whatever reason. Always 1920x1080p or 1280x720p.
1440x1080 1.33 actually is 4:3, most players do not recognize the widescreen flag on H.264 files.
To solve this problem export 1920x1080, 1.0.
You wont see the difference.