After all my sweat and tears over this issue, it hit me......once my analog tapes are digitized.....on my computer.....then is the frame-based or field-based issue really an issue????
I thought that had to do with analog.....and once digitized.....well, all digitized material the same.....other than the format it is in.
Please, illuminate me!!
Tippy.................
Frame or field-based immaterial after digitized??????
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heinz-oz
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Tippytoes
So you are agreeing with me that once it is digitized I no longer have to worry about field order, etc??????
"... and you will certainly and quickly see it if you have got the order wrong!!! "
"Normal TV broadcast is field based, DV-AVI captured from a digital camcorder is field based. The difference between analog and digital is that the field order is reversed."
"... and you will certainly and quickly see it if you have got the order wrong!!! "
"Normal TV broadcast is field based, DV-AVI captured from a digital camcorder is field based. The difference between analog and digital is that the field order is reversed."
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jchunter
Tippy,
You definitely have to manage field order, along with all the other video and audio properties throughout the entire process: capture, edit, create video file, burn DVD. Follow the recommended procedure in the top sticky post. BTW, Analog video is almost always Upper Field First, Digital video is almost always Lower Field First..
You definitely have to manage field order, along with all the other video and audio properties throughout the entire process: capture, edit, create video file, burn DVD. Follow the recommended procedure in the top sticky post. BTW, Analog video is almost always Upper Field First, Digital video is almost always Lower Field First..
Hi Tippy,
When you're looking at your footage within Video Sudio, you wouldn't see a difference in terms of field order, but if you render footage at LFF that was originally captured as UFF footage and then burnt that footage to DVD, you would see some strange behaviour during playback. You would see things like the motion of the image moving back a frame and then moving foraward again during playback, and you may also see some jerky lagging on camera pans. The frame based setting is for playback on a computer only. Upper Field First is for capturing, playback, rendering and burning analog footage, and Lower Field First is for capture, playback, rendering and burning DV footage.
When you're looking at your footage within Video Sudio, you wouldn't see a difference in terms of field order, but if you render footage at LFF that was originally captured as UFF footage and then burnt that footage to DVD, you would see some strange behaviour during playback. You would see things like the motion of the image moving back a frame and then moving foraward again during playback, and you may also see some jerky lagging on camera pans. The frame based setting is for playback on a computer only. Upper Field First is for capturing, playback, rendering and burning analog footage, and Lower Field First is for capture, playback, rendering and burning DV footage.
Terry
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heinz-oz
Think of it as a picture cut in lots of little horizontal strips. These strips are numbered. The even ones make one field the odd numbered ones make the other.
These strips are now consecutively displayed on your TV screen, either odd or even numbered ones first. With PAL we get 25 frames/sec = 50 fields/sec. A moving object will change its position on the screen considerably during a period of 1/50th of a second. Hence, when the first strip of your second field is displayed on your TV, the adjacent one from the first field has been in place (and fading) for 1/50th of a second already. Unless your field order is correct, the second field will show your object in a position where it should have been 1/25th of a second before. The movement is going to be irregular (forwards/backwards/forwards) rather than constant.
The only time you do not have to worry about field order is with still images.
These strips are now consecutively displayed on your TV screen, either odd or even numbered ones first. With PAL we get 25 frames/sec = 50 fields/sec. A moving object will change its position on the screen considerably during a period of 1/50th of a second. Hence, when the first strip of your second field is displayed on your TV, the adjacent one from the first field has been in place (and fading) for 1/50th of a second already. Unless your field order is correct, the second field will show your object in a position where it should have been 1/25th of a second before. The movement is going to be irregular (forwards/backwards/forwards) rather than constant.
The only time you do not have to worry about field order is with still images.
And if you let me add another 1 cent (not worth more) this is why I've seen so many ugly "slide shows" from people that made a frame-based presentation because they keep reading here and other places "use frame-based for stills".heinz-oz wrote: The only time you do not have to worry about field order is with still images.
The slide shows are really movies as soon as you introduce titles with movements/fades and/or transitions/overlay/pans/zooms. All that is movement and should respect the fields alternance. And slide shows are rarely a series of pictures with cuts between images.
Always use field-based EXCEPT when the target is a progressive display (computer monitors or other digital progressive TVs).
Please be careful when advising frame-based for stills.
The quoted phrase is OK is the sense that, if you're setting up your slide show you may select either of the field order as you wish. That's how I feel but even that could be wrong.
Sorry for taking your time.
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heinz-oz
@ daniel
you are of course right. That's why I said .. you don't have to worry with stills. I never said to use frame based. Once you introduce movement into your stills it becomes imperative to have the correct field order. Never mind which one as long as you maintain it throughout. Unless, of course, your DVD player and TV are progressive scan capable.
you are of course right. That's why I said .. you don't have to worry with stills. I never said to use frame based. Once you introduce movement into your stills it becomes imperative to have the correct field order. Never mind which one as long as you maintain it throughout. Unless, of course, your DVD player and TV are progressive scan capable.