Puggo - Jar Jar's Yoda said:
Impressive!
Hi, Puggo - Jar Jar's Yoda! I'm using your quote from a year ago in case the forum flags posters of replies (if apparently not, I'll just alert you with a PM).
I'm going over your sample 16mm-transfer clips made some time back for msycamore. He was having trouble with syncing the video/audio and posted it's re-mux, which also ran fast.
I initially noticed that the video portion was identified in Media Player Classic: Homecinema as "Video: DVSD 720x480 29.97fps 28771Kbps". Of course this video was a film capture that should've been running at 24 frames per second or "23.98fps" in the video. Setting it to film mode in an Avisynth script ...
vid001 = OpenDMLSource( "bits.avi" ).AssumeFPS( "ntsc_film" )
... brought it down to it's proper speed. As the .ZIP file I received was the original one from you (I'm guessing), I was wondering if you could describe your transfer procedure and what software you used to get the video into this final state.
msycamore mentioned that the corresponding audio clips were captured separately. These, in the MPC:H player, were identified as "Audio: PCM 48000Hz stereo 1536Kbps". However, when I tried to sync the longest running dialogue clip (about 1½ minutes), the video could not keep up with the audio -- starting in-sync and ending significantly out-of-sync. There wasn't any obvious double-frame-captures to explain it (and there would have to be quite a few for this bad of a problem). So I tried setting the audio at a lower rate ...
aud002 = WAVSource( "audioBit2.wav" ).AssumeSampleRate( 47650 )
... to stretch it out over the length of the video (but not exactly -- I adjusted it by trial-and-error). Then, of course, it remained in-sync over the entire the clip. So, again, please describe your procedure and software for preparing the audio.
One thing I did find (and I will go over the video, frame by frame, to look for more anomalies) was what appears to be an "impossible capture" of misaligned-fields in an interlaced frame (!):
This would indicate a bug in the transfer/processing software. (It may affect the frame count, though probably not enough for this sync problem.) You might want to check into it.
One other thing I noticed was the periodic lightening/darkening of the opening titles' blank background. Could it be some kind of AC hum varying the projector brightness, which is caught at various points by the camera capture? If so, that would be a major design flaw in the hardware -- which then might need a power regulator for the light. Or it could be just this print. You might want to test your equipment with a length of uniformly dark leader.