On a long videosequence ( long theatre play) I tried IS0 12800.

Actually after roughly 30 minutes the recording stopped. I then restarted recording which went on smooth.

As I controlled the mts files I found out that the recording stopped as the mts maximum size of 4,29 gb was reached.

But unfortunately all video material on the sd card was corrupted. No mts files could be watched with Quick time or VLC. And Final Cut was unable to log and transfer any of the video material.

I could fix it with the free Panasonic tool: AVCCAM SD Card Recovery

Afterwards still Final Cut broke down on the on MTS File I recorded with ISO 12800. This I fixed by not copying the last second of this file through log and transfer.

Funny: AVCCAM SD Card Recovery did of the ISO 12800 file of length: 4,29 gB more than 8 GB.