Open XDCAM (in mov wrapper) in AVISynth

[armadillo22]

Hey guys

I've tried to open an XDCAM file (.mov wrapper) within AVISynth but keep getting the following error:

FFVideosource: Frame accurate seeking is not possible in this file.

My current workflow is as follows:

1) Index the XDCAM mov file by running ffmsindex.
2) With the .ffindex file now created I call the mov file within AVISynth using the following script:

V1=FFVideoSource("my files location")
A1=FFAudioSource("my files location")
F1=AudioDub(V1,A1)
return F1

When I do this it loads the preview fine and I can scrub through the file.

However when I load it into my encoder (ProCoder3) it loads the script fine (all the properties such as frame rate, size and duration are picked up correctly) but then I hit encode and it creates a file where the first frame of video is what I expect and then it switches to an error message that says "FFVideoSource: Frame accurate seeking is not possible in this file."

I've tried opening the file in virtualdub and also run it through ffmbc but still...same results.

Now I know XDCAM isn't explicitly supported but I've had success decoding IMX50 in a mov wrapper so was wondering if its simply a case "XDCAM NOT SUPPORTED" or if there might be something else I'm missing.

Cheers for the assistance