Video Size changes when exporting

[Grant Gomm]

Hey Derrick.
It seems to me that there are quite a few ways to do what you need. I think the way that would give you the most control over your settings is just using compressor.
However, if compressor isn’t your thing, or you’d just rather export directly from the timeline, from what I can see there’s really only one option to make an MP4 file. I’m just gonna get detailed here – maybe you’re already doing exactly this, but here goes:
So i’ll just assume you’re going to File>Export>Using Quicktime Conversion. Then at the bottom where it says “Format:” I’ll assume you select MPEG-4, and then click on “Options”.
Once the new MPEG-4 Export Settings window opens, next to “File Format” there are 2 options to select from: MP4 (ISMA) and MP4. With the video button selected, the only “Video Format” option that I could get to work as you said (using multi pass) was the .H264 option. So I’ll assume that’s how you’ve been doing it.
I tried a sample clip with those settings, and I got it to work just fine. My source footage was ProRes 4444 960×720, so when I exported based on your settings, it came out squished on the sides, but it was still 640×360. The only things that I can think of are that:
1. You’re doing something different than what I did above,
2. There’s something with your source footage, maybe aspect ratio, pixel aspect… dunno
3. Well, I’m not sure about a 3, lol…

But I’d just recommend sending it to compressor and see if you have the same problems there.
-Grant

-Grant Gomm