Thanks for the effort guys.
I was pretty sure it was the files. I'll check the iOSD connections but since we get the correct displays on screen I'd assume all is well there. Duff memory card is a possibility but I can't get any file to open correctly. The A2 started on v2.1, missed out v2.2 and is now v2.3. It doesn't matter what version the files were created under they act the same. A possibility was that the download thru the USB from the IOSD was bad. I did it on a Mac under Parallels which is usually OK. It was the first download and contained 4 months of data. The file sizes range from an average of around 50mb to a maximum of over 200mb. Not sure if there's any significance in that.
It would be interesting what DJI would make of it all. TahoeEd maybe will take it up?
andy
There may well be something simple to fix with the files you already have, DJI would know better, the file sizes sound good though for me its usually around 5mb per minute of data, but when its sent to the program you are getting less that 1 second so some things not right. [MENTION=736]Tahoe Ed[/MENTION] may be your best bet.