[David R israel]

ps — and just to clarify:

as initially said, these “25 frames”
that I mention are in view on the
Preview monitor, when moving, frame
by frame, along the timeline (when
the project is set to 25 frames
per second and the timeline ruler
is set to “Time and Frames”).
There are NO two identical frames
among those 25 / sec frames– each
is unique.

The audio is at a normal rate, and
has the same duration as the video.
Thus, it seems quite clear that 15
new video frames have been created
here. As I was unaware of this as
a thing that might happen, I thought
I’d ask about it — and am curious
whether it can be attributed to
Vegas per se, to the MJPEG Codec
per se, or (as I might guess) to
a combination of the two?

david raphael israel
(in bhopal, india)

[David R israel]

Gary,

although you make a generally useful point,
it’s beside the point in this case. What I’m
telling you is that with this footage, I get
25 distinct, different frames per second! —
despite the fact the footage is clearly
marked (in metadata) as being “10 frames
per second).

And incidentally, those 10 frames do happen
to be accurately reflected (far as I can tell)
by the 10 images per second that I see on the
Vegas timeline, when looking at the farthest
level of granularity of view.

Now — can you explain the phenomenon?

Also note this: Many of the images are rather
blurry. This was video of martial arts, and
there’s a lot of motion — but I still am
inclined to believe that 15 our of every 25
of these distinct frames have been created in
Vegas (and/or by the MJPEG codec) as extrapolated
approximations of intermediate stages of what the
software opines to have been there.

Agree? Disagree? Other explanation?

cheers,
d.i.

david raphael israel
(in bhopal, india)

[David R israel]

Edward and Mike,

many thanks — installing an MJPEG codec sufficed to
solve the problem.

There’s now one fine-point questions I wonder about.

A curiousity of this MJPEG footage is that, even though
it is only 10 frames per second, when I insert it into a
Vegas timeline — where the Vegas project is set at a PAL
standard framerate (25 frames per second) [I’m in India,
and working in PAL here], oddly enogh, every frame — i.e.,
all 25 frames per second — appears as a UNIQUE image on
the preview screen, even thogh there are only 10 frames
per second visible on the timeline.

Can somebody explain this? Is it a characteristic of the
MJPEG format — or of the Vegas timeline — to extrapolate
an image in this way? It seems quite surprising to me —
and makes me wonder whether, if I instead set the project
at 50 frames per second (I think there’s that option, so-
called “double PAL”), I would then have 50 unique images
per second from this 10-images-per-second footage? The
phenomenon strikes me as almost a case of science fiction.

Awaiting enlightenment,
d.i.

david raphael israel
(in bhopal, india)

[David R israel]

Thanks Frank —

in effect, it sounds to me like you’re saying
that with the PAL model of this camera, p25 is
actually a form of p50. So is the difference
between selecting “p25” and “p50” then simply
a difference of audio-track options? — since
the “p50 per se” format allows 4 audio tracks?

I wonder if Panasonic makes a User’s Manual for
the PAL camera per se? Presumably such a
document would more correctly describe the
actual camera I have in hand. I’ve not been
able to find such a manual online. If anybody
happens to know of a link for it, I’d be obliged
for the info.

With thanks again —

cheers,
d.i.

david raphael israel
(in bhopal, india)

[David R israel]

ps — small correction. I have two 8GB P2 cards = 16 GB total. 🙂
As said, the total shooting time I’m getting for that is 17 minutes,
when I select “720p / 25p” — though the shooting time should be
approx. double that amount. (Tentative conclusion: it appears that
my camera is incapable of shooting in 25p, only in 50p.)

david raphael israel
(in bhopal, india)