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| rfmmars |
| Posted: Feb 3 2004, 03:35 AM |
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Advanced Member
Group: Members
Posts: 324
Member No.: 5438
Joined: 29-July 03
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Most of my work is telecine and VHS to DVD. However I have run into a problem when capturing from some 8mm analog camcorders.
During capture, the video is smooth and fluid, but on playback or creation of a DVD, any panning looks like studdering, in other words all vertical edges have multi-ghosting. This does not happen with VHS table top machines or full size camcoders or VHS-C formats.
I have used different codecs, three different capture cards, and many capture programs, but it is always the same.
Then I worte a script as follows.
AVIsource("sample.avi")
separatefields
bob
....and open it up in VDMOD 1.54. It looks like it's playing Field 2, field 1, field 4, field 3.. and so on. Tried all the deinterlace plug-ins, but no solution. I can make a Camcorder to VHS direct copy, and the tape plays fine, but if a capture the VHS tape, same results.
What it look like on the screen is if a person is walking they take a step forward, then a step backwards, then two steps forward, then one step back and so on.
I have captured this tape from various camcorders with the same results or worst. I have visted the 100fps web site and have played aound with scripts, but haven't solved this problem.
Any input would be helpfull.
Richard
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| adlerweb |
| Posted: Feb 3 2004, 03:18 PM |
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Unregistered
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It seems to be a comcorder problem. Many older analog comcorders captured not enough Frames for a full NTSC or PAL-Image. To fix that Problem they "striped" the frame a little and smoothed the overlays. I think VDub is capturing or decoding this Frames not correctly...
Have you tried to use preview or overlay to capture?
CYa adlerweb
ps: sorry for the english  |
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| rfmmars |
| Posted: Feb 4 2004, 01:31 AM |
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Advanced Member
Group: Members
Posts: 324
Member No.: 5438
Joined: 29-July 03
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Your english is fine, and many thanks for the reply and ideas on the subject. I want to try what you have suggested.
After I posted yesterday, I worked on the problem into the night with complete succes. I wrote the following script.
avisource("sample.avi")
ComplementParity
separatefields
.........................and no filters in VD. I used Huff codec to produce the finished .AVI.
I burned the DVD in MEP2004 with perfect motion, however this was only a 3 minute clip, and after doing the complete clip, the program only imported about 5 minutes of video, but the whole 30 minutes of audio with perfect video/audio sync for the 5 minutes of the video portion.
I also found that using other .AVI and Mpeg2 encoder undid the perfect motion.
Thanks again
Richard
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| MRT |
| Posted: Feb 13 2004, 07:34 AM |
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I capture from 8mm and VHS via a dc10 card at 3000KB/S in mjpeg Pal 25fps. format and burn to SVCD with Pinnacles Studio 8. I havent got a DVD burner yet but can burn in that format 10mins to a cdr.
Output apparently not quite as good as from digital camera but better than VHS.
Getting back to the point if you have got ghosting when you go from 8mm to computer then you have to check your capture method.
I use Avisynth and Virtualdubmod for video manipulation and the output I find is as good as the input.
Remember the old saying "Garbage in = Garbage out so if the captured file is not of high quality any processing is not going to fix it.
Visit the Pinnacle forum where magic is produced plus a lot of winging |
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| MRT |
| Posted: Feb 13 2004, 07:47 AM |
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Just thought I would add the comment that menus, motion menues, chapters, transitions, voice overs, titles and background music are a breeze added to SVCD/DVD.
Its the pic in pic and special effects that I am trying to get a handle on with Avisynth scripts.Thats why I am here. |
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| rfmmars |
| Posted: Feb 14 2004, 07:45 PM |
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Advanced Member
Group: Members
Posts: 324
Member No.: 5438
Joined: 29-July 03
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MRT......Thanks for your input. I also have two DC30 cards and I used them to see if there was a capture problem, but the same result were the same. As posted by adlerweb, this is a camcorder problem as some but not all have this problem and it extends to the DV unit as well, and the solution varies.
I had wish that someone had responed to my question of why there is no audio when I use the Avisynth script, but I tank you for you post.
plugin=mpegdecorder.dll
mpeg2source("sample.avi")
ComplementParity
separatefields
Richard |
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| MRT |
| Posted: Feb 15 2004, 06:16 AM |
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Unregistered
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Hi. One question as the video is ok camcorder>vhs how is the result captured from VHS Recorder ?.
Also as you appear to be a competent user of AVIsynth may be you could help me with scripts visit
http://users.froggy.com.au/prism/index.html and let me know |
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| i4004 |
| Posted: Feb 15 2004, 10:09 AM |
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Advanced Member
Group: Members
Posts: 2432
Member No.: 4935
Joined: 24-June 03
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| QUOTE | | It looks like it's playing Field 2, field 1, field 4, field 3.. and so on. |
this is reversed field order........
i think simon walters made filter to correct it...
Reverse Field Dominance
on
http://www.geocities.com/siwalters_uk/fnews.html
field order checking can be done via avs'
"assumetff()"
or "assumebff()"
check avs manual....
--------------------
my signature:
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| rfmmars |
| Posted: Feb 17 2004, 03:14 AM |
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Advanced Member
Group: Members
Posts: 324
Member No.: 5438
Joined: 29-July 03
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MRT. The problem is not seen when a tape is made off the air and played on a desktop unit, and not seen in C-VHS or full size VHS camcorder format. It's with analog 8 and digital 8, and maybe DV.
The script does the job, and provides smooth playback when burned to DVD.
No I just started with AVISYNTH because this seem to be the only path to the solution, and is was. Even being a novice at best, I would more than happy to work with you with this AVIsynth scripting.
4004i.......thanks for your input very much. Maybe you have the answer to my final quest.
I am not using MPEG2DEC2 or 3, but using MPEG2decoder, and it works fine. Question is what do I need to add to the script to get the audio?
Richard |
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