>all my sources
Well, what ARE your sources?
Read Bill Hunt on a file type as WRAPPER http://forums.adobe.com/thread/440037?tstart=0
What is a CODEC... a Primer http://forums.adobe.com/thread/546811?tstart=0
What CODEC is INSIDE that file? http://forums.adobe.com/thread/440037?tstart=0
Report back with the codec details of your file, use the programs below
For Mac http://mediainfo.massanti.com/
Once you know exactly what it is you are editing, report back with that information... and your project setting, and if there is a red line above the video in the timeline, which indicates a mismatch between video and project
Also, to be sure everything matches...
See the 2nd post for a picture of the NEW ITEM pointer http://forums.adobe.com/thread/872666?tstart=0
I have 6 videos and 1 picture for my sources. Do you want the specific information about the videos (like frames/second, etc)?
All videos are MP4, I am trying to output in m4v.
it tells me my source is 720x480
That's because your sequence is 720 x 480, which is what's read as the 'source', not the media itself.
Create a proper new HD sequence, then Copy/Paste all clips into that.