Preview mode plays too fast

soundguy63 wrote on 3/3/2002, 9:48 AM

I'm using the latest download of VF 2.0c on a Pentium III 933mz with 384 megs of ram.
Sound equipment is a MOTU midi timepiece av and a MOTU 2408MkII. DV deck is a JVC BR-600, all tapes shot with the JVC BR-5000 3-chip camera with dropframe timecode. Everything is locked to a black-burst generator and all project property settings are for standard DV at 29.97 fps and 48k audio.
In preview mode anything imported to or captured with VF plays too fast both in audio and video. All track playback settings are at a run rate of 1.000.
If you render the timeline from VF2 and play that in any other software it plays back correctly. But if you re-import the movie back into VF2 and play it in preview mode it again has the speed problem. Any captured video works correctly in any of the other DV editing software that I use. Everything works perfectly except playing in VF2 preview mode. The speed difference is 3 minutes of the timeline plays back in 2 mins. 45 secs of real time.
Is there a setting that I'm missing somewhere?? Can VF2 not handle drop-frame timecode?? Thanks in advance for any advice. JRM

Comments

Former user wrote on 3/3/2002, 1:10 PM

It sounds like VF thinks you are in PAL. Check the PROJECT PROPERTIES and make sure they match the actual project.

Dave T2

soundguy63 wrote on 3/4/2002, 6:57 PM

I've matched all media settings and project properties. Everything is set for NTSC standard DV at 29.97 with 48k audio.
I forgot to mention in my first post that I'm running Windows 2000 Professional. Is anyone else having any problems with VF under W2K, especially with external audio equipment and video sync?
As I already mentioned, any other software that I use operates correctly and VF actually renders correctly...
Any other suggestions?
Thanks, Jay

soundguy63 wrote on 3/6/2002, 4:15 PM

I figured out the problem. Apparently VF forces all audio playback from the timeline to 44.1k even if it's only dealing with 48k audio from a DV capture.
I guess it does this so people can seamlessly mix tracks ripped from an audio CD without having to convert those files.
When you render out the timeline, those 44.1k files are upconverted automatically to 48k to match the DV files.
My external digital audio equipment was locked at 48k. So when playing from the timeline the audio was pitched too fast. In order to maintain sync with picture, VF was also speeding up the video. Once I allowed the equipment to slip down to 44.1k while working from the timeline everything was fine, even though it's actually playing a file originally recorded at 48k.