capture from Song Hi-8 problem

NeilM wrote on 9/20/2002, 11:05 PM
I'm a recording engineer that's dabbling in video, so my knowledge is a bit one-sided. I have the audio side down, but how it relates to video is still a bit of a mystery to me so bear with me here. :)

I captured an 18 minute project from a Sony Hi-8 camera via my firewire card and the clip points seem to drift. The video was recorded with audio at 44 instead of 48, but I set the project up that way. The longer the clip, the more of a space there is between it and the next one. It recorded without a single dropped frame and the quality is fine. It seems like the audio was recording at the wrong sample rate and the video followed it. Everything plays back at the proper pitch, so it doesn't appear to be a sample rate playback issue. Could I have recorded at the wrong sample rate and have it play back properly? Would the video follow the audio and therefore leave these little "catch up" spaces at the end of each clip? I tried capturing at 44 and 48 with the same results.

Thanks
Neil Meckelborg

Comments

NeilM wrote on 9/20/2002, 11:07 PM
Oops, Sony, not Song
markrad wrote on 9/22/2002, 11:01 PM
Neil,
Just to get the ball rolling what version of Vegas 3 are you running?
3.0c Build 138 is the most current I believe.
seeker wrote on 9/23/2002, 4:04 AM
Neil,

"I captured an 18 minute project from a Sony Hi-8 camera via my firewire card..."

I must be missing something here, but how do you capture analog Hi-8 footage with a digital FireWire card?

-- Burton --
NeilM wrote on 9/23/2002, 4:31 PM
Oops again. I meant Sony Digital 8. Sorry
NeilM wrote on 9/23/2002, 4:33 PM
I'm using 3.0c Version 138. And as I mentioned to "seeker" I meant Sony Digital 8 as opposed to Sony Hi-8.

Thanks!
SonyDennis wrote on 9/23/2002, 5:12 PM
I'm not sure how you got your Digital 8 to record audio at 44.1; DV only supports 48kHz and 32kHz audio sampling rates. Vegas fully supports locked and unlocked audio (include the famous "Canon drift" syle unlocked audio <g>).
///d@
NeilM wrote on 9/24/2002, 12:17 AM
Hmmmm, the video client said that it was all 44K audio. All the audio files ARE 32K and when I set the properties to 32K for audio it plays back like a 33 1/3 record at 16. My sound card (Sonorus Studio) doesn't even support 32K. How can I playback 32K audio on a system that will only clock to 44 or 48K?

Thanks!
SonyEPM wrote on 9/24/2002, 4:26 PM
Set the Vegas project to a khz rate the card supports (44.1 or 48k in your case). If the source files are interpretted correctly Vegas should resample the audio on the fly, and the pitch should be normal.
NeilM wrote on 9/26/2002, 12:05 PM
My Mini DV works fine so I asked the client to bring me the video on that format. It loaded fine. Must be something in the recognition of the Sony. I'll have to figure that one out sometime but for now the problem is solved.

Thanks

Neil
ntltec wrote on 9/29/2002, 12:10 PM
Hi NeilM

Not exactly sure of what your exact problem is, but I had a problem with the recorded image and sound not being in time, drifting apart more and more the longer the sequence ran. The sound was perfect, and the picture appears fine. What I finally found ( after 3 days ) was that the template I was using ( Im in the UK so use PAL ) was still defaulting to NTSC, and so the sample rate for the images was running at 29.4 ( I think ) frames per second , not the required 25 fpr required to keep the syc in the final presentation . Don't know if this is what you are getting , but it is alway a good idea to made a complete check of the settings of the original source and of the software being used to manipulate it.