Audio Video does not sync upon INPUT of .mp4 file

I use Elgato Video Capture to digitize 6-hour VHS tapes. It emits *.mp4 files and passes them to iMovie.
In iMovie 9 there were no problems.
Using the same workflow in iMovie 11 leaves the audio lagging progressively behind the video. Amusing, but useless.
I searched these forums and found answers to the problem of in-sync audio getting out of sync on export. That is not my problem! My audio is out of sync upon import into iMovie 11.
Do I have to go back to iMovie 9?

I don't know, but if it were me, I would use EyeTV to export shorter chunks, e.g. logical events, rather than all 6 hours at once.
Alternatively, you could use MPEG Streamclip and chop it up there into logical events.
You can right-click on the EyeTV recording in EyeTV and select reveal in finder. Then right-click on the .eyeTV file in the finder and select SHOW PACKAGE CONTENTS. You can then drag the .mpg file into MPEG Streamclip and split it there. You may need the $20 Apple MPEG2 Playback Component. MPEG Streamclip will tell you if this is the case.
The advantage of doing it in EyeTV is you wouldn't have to spend the $20.
My only other idea is to check the EyeTV forums.

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