Green frames when using AppleScript to export from QT

Question

Not sure if this is a QuickTime issue, h.264 issue, or an AppleScript issue, but i thought I'd start here since I know the least about AppleScript and have some clues to the problem.
I'm creating an Automator workflow that requires a run AppleScript action. My plan is to use applescript to have QuickTime Pro 7.6.6 export an image sequence from a QuickTime movie in h.264, using a QuickTime settings file I've already exported. The script points to the settings file and and exports the sequence to the output folder I've specified. Im looking to export one frame per second. Running the script works well and I'm almost getting the result I want, except that each frame that is exported is entirely green.
Interestingly, when I run the exact same process manually, using the exact same settings, the export works fine, and the frames are correct. Additionally, exporting via AppleScript brings up a different status bar than when exporting manually, which leads me to believe that AppleScript is the culprit. Perhaps it's running some sort of outdated process? The AppleScript status bar comes down from the top middle of the video frame, while exporting manually, brings up a floating status bar. They look decidedly different.
Has anyone run into this problem? Can possibly shed light on it? Possible AppleScript work around?  This only seems to effect h.264 videos. If I run the same AppleScript on a prores file, the images export correctly.

Answer 1

Including the applescript in question could be helpful!
tell application "QuickTime Player 7"
          export front document as image sequence using settings "Macintosh HD:Users:grato:Documents:SYNC:Sync Assets:settings:Sync_QTexport_setting.qtes" to "Macintosh HD:Users:grato:Documents:SYNC:Sync Assets:Assets:temp:Sync-"
end tell