23-08-2013, 08:11 PM
David wrote:
"There is an obvious break at 133, there are frames missing from 313 thru 400...
Based on your film knowledge, if these "transitions" were removed along with the rest... how would you know?
My THEORY here is that at least 928 frames at 48fps (19.3 seconds of film) were reduced to 354 frames (486-132) at 18.3 (19.3 seconds of film) by removing 574 frames of 48fps film. Please prove this is not possible..."
Although I'm not aware of anyone specifically asking Zapruder what his thought processes were when he was filming, it certainly looks like he began filming and then noticed that the presidential vehicle was not directly behind the lead vehicles, so he stopped filming and then restarted as the limousine came into view (Z133). In the space between these two shots, he may well have switched the frame rate, and so Z133 could have started a sequence at 48fps. (but, I would argue that this rate would then have had to remain constant through to last frame at Z486). I cannot see anything within the frames that would suggest the frame rate was adjusted - and also any resulting disruption I believe would reveal itself, even after removal of frames, because the disruption would occur over multiple successive frames (particularly at 48fps) and their removal would have produced a visible jump as Zapruder panned following the limo. That is, the extant film could have been created by a "dropping 2 frames keeping 1, dropping 2 frames keeping 1" formula - but there is no allowable place to remove a run of successive frames without that calling attention to itself. Having done step-printing, I found that even a single frame too little or too much can disrupt a rhythm.
Past that, in terms of what could or could not be done with an optical printer at, say, Hawkeye works - that facility would have a guy just like Ralph Pearse at NPIC, who would lay out some basic information about what was and was not possible. Based on my own experiences with optical printers, I think I know some of the things he would point out. I'll share those if someone is interested.
"There is an obvious break at 133, there are frames missing from 313 thru 400...
Based on your film knowledge, if these "transitions" were removed along with the rest... how would you know?
My THEORY here is that at least 928 frames at 48fps (19.3 seconds of film) were reduced to 354 frames (486-132) at 18.3 (19.3 seconds of film) by removing 574 frames of 48fps film. Please prove this is not possible..."
Although I'm not aware of anyone specifically asking Zapruder what his thought processes were when he was filming, it certainly looks like he began filming and then noticed that the presidential vehicle was not directly behind the lead vehicles, so he stopped filming and then restarted as the limousine came into view (Z133). In the space between these two shots, he may well have switched the frame rate, and so Z133 could have started a sequence at 48fps. (but, I would argue that this rate would then have had to remain constant through to last frame at Z486). I cannot see anything within the frames that would suggest the frame rate was adjusted - and also any resulting disruption I believe would reveal itself, even after removal of frames, because the disruption would occur over multiple successive frames (particularly at 48fps) and their removal would have produced a visible jump as Zapruder panned following the limo. That is, the extant film could have been created by a "dropping 2 frames keeping 1, dropping 2 frames keeping 1" formula - but there is no allowable place to remove a run of successive frames without that calling attention to itself. Having done step-printing, I found that even a single frame too little or too much can disrupt a rhythm.
Past that, in terms of what could or could not be done with an optical printer at, say, Hawkeye works - that facility would have a guy just like Ralph Pearse at NPIC, who would lay out some basic information about what was and was not possible. Based on my own experiences with optical printers, I think I know some of the things he would point out. I'll share those if someone is interested.