Hi William,
No flames on this forum, we’re professionals! ;^)
I haven’t worked with Android video, but I can tell you that the iPhone shoots square pixel, and your still images should also be square pixel.
If your Android video isn’t square (perhaps 1440 x 1080), and your first clip in the timeline was an Android clip, I can envision a scenario where your timeline is set that way. There are a couple of ways to work around this:
1. Export a master file in ProRes from your timeline as-is. Then set up a 1920×1080 preset in Compressor, ensuring that you manually set the aspect to Square Pixels in the Video tab.
2. Rebuild your timeline, starting with either a gap clip or one of your iPhone clips to ‘bake in’ the square pixel setting – you can delete this after you have other media in the timeline. I’m unaware of any way to change the pixel aspect of a timeline after the fact.
Doug Metz
Anode