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Applying Filter To Part Of Video Possible?
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glaskachelhenk
Posted: Aug 15 2008, 07:53 PM


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Member No.: 24048
Joined: 15-August 08



hello friends of vd,

i just downloaded this program and start with a typical newbie-task (at least, i think it is):

i have some short video files (mostly avi-type) which i recorded with my digital photo camera. during filming, i turned the camera 90° in my hand so that the film - lets say it is 2 minutes long - is rotated after one minute and thus, no pleasure to watch.

i already found out that i can (re-)rotate a movie file by selecting a rotate-filter in vd (ctrl + f).

my question is: is it possible to apply the filter only for the latter half of the avi-file, so that i can take out the camera-rotation subsequently?

i already messed around with making selections but with no luck.


thanx in advance for your help,

yours,
glaskachelhenk.
 
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Placio74
  Posted: Aug 15 2008, 09:18 PM


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Possible to use rotate2 with Curve editor (eventually with Smart rendering mode).

Segmented Editing Of A Video
Rotate Video, in its middel

QUOTE (Placio74 @ Apr 20 2008, 06:36 AM)
After open video not set selection start/end.
Instead this...
Go to Filters, choose filter (or filters) and use Blend button.
After... View > Curve editor.
Then on curve editor choose filter and use Ctrl/Shift keys with right/left mouse button to set start/end range of frames (for this filter).

Look at this video guide from YouTube: Applying Filters to a Range of Frames in Virtualdub

BTW
You can try use Smart rendering (Video menu) to recompress only fragments (not all) video, but need to use same codec as used in source.

QUOTE (-SPM-Mad @ Apr 15 2008, 11:07 PM)
You can turn on [Blend] for any filter in the recent VD versions and apply the filters only certain parts of the movie. Under View->Curve editor you can enable the blend-curve and edit it to have 100% on the part you want rotated and 0% before and after it.

The only catch is that the filter before and after the blended filter needs to have the same framesize. And as you said, rotating a 640*480 movie would result in a 480*640 movie. If you want to just have a black border, you can use the 'rotate2' filter.

If you want to zoom out a little (more black border but also more of the video), you can add a resize filter first and under 'framing options' choose letterbox of the size of your orginal video. Then you can decrease the size and then rotate it or increase the size so the new video will take up all the space.
Ofcourse that means you have to make the same blend-curve for both filters.

'Filling in' the informations that your camera did not capture is hard tho. For small borders I used LogoAway before (http://voidon.republika.pl/virtualdub/index.html). It can 'copy' the pixels at the border and drag them outwards. But ofcourse in the end this just looks blurry, which might be better than just black, but still is far from what the camera did not capture.

Greetings
-SPM-Mad


It works with most filters, but very probably exceptions: rotate (not rotate2, it's different and works), resize and few other filters.

--------------------
VideoAudio.pl - Serwis o technologii wideo & audio
 
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glaskachelhenk
Posted: Aug 16 2008, 11:02 AM


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Joined: 15-August 08



thanx Placio74, i will try that during the day.

greetz,

glaskachelhenk.
 
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