EX1/ Prospect Audio Synch Problem at DVinfo.net

Robert Young · October 9th, 2008, 07:53 PM

EX1 HQ 1080 30p interview footage imported with Sony Clip Browser, converted to CFHD 1920x1080 30p w/ HDLink, imported to Premiere CS3 into a Prospect 1080 30p HQ project. No glitches during this process- but, with every clip the audio is out of synch by 4 frames. Original footage is fine.
Synch error is consistant throughout.
I never noticed a problem before probably because I have never shot an interview with EX1 previously.
Does anyone have any experience with this??
Thanks

David Newman · October 9th, 2008, 09:20 PM

I have not heard of this. Are you converting MXFs or MP4s?

Bob Hart · October 9th, 2008, 09:36 PM

This is slightly off-topic but may be valid.

Did you take your audio direct-to-camera from a microphone or have you sourced your audio from an audio mix console?

For some reason on a multicamera shoot my direct-to-camera reference tracks were fine but my mixer feed to the master camera was a bit out and my audio tracks lined up fine but the vision then seemed about a quarter beat off. I eyematched it in the end and did not go looking for the cause as the event was a one-off job.

Robert Young · October 10th, 2008, 11:43 AM

David- The files were brought into the computer as mp4 by the Sony clip browser. I just used the Clip Browser in default mode- didn't alter any settings. Also, I captured once direct from the cam via USB, then tried again with SxS inserted directly into laptop.

RE audio input- I was using an on camera shotgun on Ch1 and a wireless lav on Ch2- both direct into the cam, no mixer.

David Newman · October 10th, 2008, 12:35 PM

I can't think I any reason that your audio is off. File a trouble ticket and send a sample (short) MP4 to support.

Robert Young · October 10th, 2008, 03:41 PM

Thanks David.
Soon as I finish this project and get it out, I'll go back thru the whole chain and take a second look before filing a ticket.
I just wanted to check if this was a known issue or not.

October 9th, 2008, 07:53 PM	#1
Robert Young Trustee Join Date: Mar 2005 Location: Coronado Island Posts: 1,472	EX1/ Prospect Audio Synch Problem EX1 HQ 1080 30p interview footage imported with Sony Clip Browser, converted to CFHD 1920x1080 30p w/ HDLink, imported to Premiere CS3 into a Prospect 1080 30p HQ project. No glitches during this process- but, with every clip the audio is out of synch by 4 frames. Original footage is fine. Synch error is consistant throughout. I never noticed a problem before probably because I have never shot an interview with EX1 previously. Does anyone have any experience with this?? Thanks __________________ Bob

October 9th, 2008, 09:20 PM	#2
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	I have not heard of this. Are you converting MXFs or MP4s? __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

October 10th, 2008, 11:43 AM	#4
Robert Young Trustee Join Date: Mar 2005 Location: Coronado Island Posts: 1,472	David- The files were brought into the computer as mp4 by the Sony clip browser. I just used the Clip Browser in default mode- didn't alter any settings. Also, I captured once direct from the cam via USB, then tried again with SxS inserted directly into laptop. RE audio input- I was using an on camera shotgun on Ch1 and a wireless lav on Ch2- both direct into the cam, no mixer. __________________ Bob

October 10th, 2008, 12:35 PM	#5
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	I can't think I any reason that your audio is off. File a trouble ticket and send a sample (short) MP4 to support. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

October 10th, 2008, 03:41 PM	#6
Robert Young Trustee Join Date: Mar 2005 Location: Coronado Island Posts: 1,472	Thanks David. Soon as I finish this project and get it out, I'll go back thru the whole chain and take a second look before filing a ticket. I just wanted to check if this was a known issue or not. __________________ Bob

October 9th, 2008, 09:36 PM	#3
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,477	This is slightly off-topic but may be valid. Did you take your audio direct-to-camera from a microphone or have you sourced your audio from an audio mix console? For some reason on a multicamera shoot my direct-to-camera reference tracks were fine but my mixer feed to the master camera was a bit out and my audio tracks lined up fine but the vision then seemed about a quarter beat off. I eyematched it in the end and did not go looking for the cause as the event was a one-off job.