Hi all!
With this post I’m just trying to gage the extent of the problem I have discussed in earlier posts {i.e. interlaced artefacts, strobing, blurring of object edges with 25P footage played back on a PAL monitor}. Many of us PAL users seem to be experiencing this problem and I am yet to hear an NTSC user complain of this problem. {Any NTSC users with this problem please correct me!}
I have been in touch with Panasonic UK who said there have been no reports of this problem, so basically I’m trying to get some figures to show them. Are you an unhappy 25P PAL user with this problem? If so could you post me a message? {Likewise if you’re a 25P PAL user, happy with the image on a pal monitor during camera movement.}
If you’ve got some spare time why not conduct a little test as follows:-
1 On a piece of white a4 landscape, draw a hand full of diagonal lines with a thinish black marker from left to right, top to bottom- \\\\\
2 Plug cam into your PAL monitor and set up your cam on tripod about 5 foot away from card and zoom in all the way, focus, colour balance etc.
3 In interlaced mode, slowly pan back and forth from 1 end of the card to the other, the lines should remain clear with sharp edges.
4 Repeat step 3 in progressive mode. Do your lines look more like steps? Mine do.
From a progressive medium, we’d expect the lines to stutter slightly with a pan but surely there is no reason they should break up? This seems to occur on all horizontal & diagonal edges within the frame during a pan causing uncomfortable strobing and loss of fine detail.
I have a theory-
On the NTSC version in 24P the pull down creates mostly complete frames but there are the odd frames created during pull down where each field comes from a different frame, which Panasonic refer to as a ‘jitter frame’.
Is it possible that there is a fault in the way our cam records the A B fields to tape so our foot is made up entirely of 'Jitter Frames’? My 25P footage certainly shows all the artefacts you'd expect to see in 'jitter frames' and this would also explain why our 25P footage looks fine on a progressive Computer monitor, as you wouldn't see individual fields.
What do you think?
With this post I’m just trying to gage the extent of the problem I have discussed in earlier posts {i.e. interlaced artefacts, strobing, blurring of object edges with 25P footage played back on a PAL monitor}. Many of us PAL users seem to be experiencing this problem and I am yet to hear an NTSC user complain of this problem. {Any NTSC users with this problem please correct me!}
I have been in touch with Panasonic UK who said there have been no reports of this problem, so basically I’m trying to get some figures to show them. Are you an unhappy 25P PAL user with this problem? If so could you post me a message? {Likewise if you’re a 25P PAL user, happy with the image on a pal monitor during camera movement.}
If you’ve got some spare time why not conduct a little test as follows:-
1 On a piece of white a4 landscape, draw a hand full of diagonal lines with a thinish black marker from left to right, top to bottom- \\\\\
2 Plug cam into your PAL monitor and set up your cam on tripod about 5 foot away from card and zoom in all the way, focus, colour balance etc.
3 In interlaced mode, slowly pan back and forth from 1 end of the card to the other, the lines should remain clear with sharp edges.
4 Repeat step 3 in progressive mode. Do your lines look more like steps? Mine do.
From a progressive medium, we’d expect the lines to stutter slightly with a pan but surely there is no reason they should break up? This seems to occur on all horizontal & diagonal edges within the frame during a pan causing uncomfortable strobing and loss of fine detail.
I have a theory-
On the NTSC version in 24P the pull down creates mostly complete frames but there are the odd frames created during pull down where each field comes from a different frame, which Panasonic refer to as a ‘jitter frame’.
Is it possible that there is a fault in the way our cam records the A B fields to tape so our foot is made up entirely of 'Jitter Frames’? My 25P footage certainly shows all the artefacts you'd expect to see in 'jitter frames' and this would also explain why our 25P footage looks fine on a progressive Computer monitor, as you wouldn't see individual fields.
What do you think?