Audio Sync Issues With nanoFlash Files

[Steve Kalle]

Has anyone else had audio sync issues with their nanoFlash files and Premiere Pro CS5 (5.0.3 - last update)?

I recorded input #1 into both channels on my EX3 and the first clip is out of sync by 2 frames with the 2nd channel being delayed by 2 frames. Then, the 2nd file goes out of sync part way through which is shown in the attached image.

This is a major PITA to fix. I have had this issue once or twice before but nothing like this with over 2.5 hours of video from a single event.

[Dan Keaton]

Dear Steve,

I will ask our lab manager to look into this.

Please provide us with the details, so he can attempt to duplicate this issue:

Camera
Embedded Audio or Analog Audio
MOV, MXF, or MPG
Firmware version, I assume 1.6.248
Codec (Long-GOP or I-Frame Only)
Bit-Rate
Frame Rate of video
Whether cranking or 3:2 pulldown or if any other special features were in use.

[Steve Kalle]

1) Camera: EX3
2) Embedded Audio or Analog Audio= Embedded via HD-SDI
3) MOV, MXF, or MPG= MXF
4) Firmware version= 1.5.126
5) Codec= Long-GOP
6) Bit-Rate= 50Mb
7) Frame Rate of video= 29.97p
8) Whether cranking or 3:2 pulldown or if any other special features were in use= none. I had E to E Direct and Record PSF>Prog enabled. Max File Size was set to 100%.

I didn't update the firmware because I wanted to use the current firmware because it had been reliable in the past and I had no SxS backup for this event and the following night's event.

[Dan Keaton]

Dear Steve,

Your nanoFlash firmware version, 1.5.126 was from June 2010.

Since then we have made changes in the audio sync.

However, we will still investigate this issue as I do not understand why the audio would be in sync at the start of a single file and then out of sync later.