How can you do this?

[dimtim]

This question may be a little weird, but I have a video with about 3000 frames. What I want to do is take the upper right hand corner of the video, about 300 pixels by 300 pixels and expand it so it fills the whole screen. I would like to do this without taking each frame individually and resizing it. Is there any way I could do this, because doing it individually with adobe photoshop takes a whole bunch of time. Thank you so much, I know it's kind of a funny question...

[sacajaweeda]

I use AVISynth for this type of stuff. To do what you say there....

AVISource("whatever.avi")
Crop(420,0,0,300)

Starting with a 720x480 frame that will leave you the upper right 300x300.

HTH

[dimtim]

Can you do this with mpeg, cause that's what it happens to be in??

[dcsos]

any program that edits video will allow this kind of operation

In premiere go>special processing> crop> resize to (720x480?)

You need to get some edit skills, because I've not seen a program that can't do this..!!
You know of course that the result is a streched and ugly resolution to the clip

[dimtim]

Yeah that's cool, sorry I'm a complete newb

[sacajaweeda]

What programs do you use dimtim?

[dcsos]

I like the idea that you were willing to animate every frame tho'
Not Afraid to try..good attitude
so let us know if you have aprogram..or well make the decision for depening on exact nature and size of your file(bitrate, codec detail needed)

[jimmalenko]

I thinkTMPGEnc can do a crop of an MPEG for you.

[dimtim]

Right now I have a wintv pvr 350 capture card. I have virtual dub and avisynth and I'm trying out adobe premiere and TMPG, only about 10 days left before I don't have those. Hey how did you guys learn how to script in avisynth, did you just mess with it until you got it, or used one of the guides, what would you reccomend??

[disturbed1]

The documentation the comes with AVISynth is pretty good. Doom9 and KVCD.net have excellant threads on advanced AVISynth scripting.

A nice tool to use is also AVSEdit. Available at www.avisynth.org. Easy to add filters and a preview funtion too.

What you want to do can be done with AVISynth and Virtual Dub. Virtual Dub and AVISynth are close to each other. Virtual Dub has the nice GUI, but AVISynth has more ability with its scripting. If you're not comfortable (or knowing) Virtual Dub is a good place to start. Eveything you learn in it can be translated to AVISynth.

TMPG's clip frame and arrange setting used together can give the same effect too.

[sacajaweeda]

Hey how did you guys learn how to script in avisynth, did you just mess with it until you got it, or used one of the guides, what would you reccomend??

Somebody introduced me to it and showed me a basic set of script commands and I just read whatever guides are available out there. There's a lot of info at their site an there's some scripting help here on this site as well. Just trial and error, eventually you get the hang of what does what and what needs to go where, etc.

I just make mine in notepad and save them as avs files. Then if you load them into VDub you can hit CTRL+E and bring up the script editor (hit F5 to refresh and preview any changes you make). There I apply various noise filters depending on the source.

These are some of the things I find myself using most often in my scripts...

AVISource("clip.avi")
MPEGSource("clip.mpg")
DelayAudio(-.xxx)
Trim(xxx,xxx)
FadeIn(xx)
FadeOut(xx)
LanczosResize(xxx,xxx)
Crop(L,T,R,B)
AddBorders(L,T,R,B)

If I'm applying noise filters on interlaced video I use this along with a filter...

ComplementParity().SeparateFields()
(filter commands here)
Weave()

I like the Convolution3d filters alot, and the Dust filters, but the dust filters really slow the encoder way down so I try not to use them unless I got lots of noise, like when working with old VHS & whatnot.

If I join a bunch of clips (different parts of the same or different clips) with some basic scene fade transitions I might do something like....

AVISource("clip1.avi").Trim(xxx,xxx).FadeIn(xx)+AV ISource("clip2.avi").Trim(xxx,xxx).FadeIn(xx).Fade Out(xx)+AVISource("clip3.avi").Trim(xxx,xxx).FadeO ut(xx)

...then add whatever filters & whatnot after that.

It seems that you can do just about anything with this thing. I've even done subtitles on some videos using AVISynth. I started using it purely out of necessity with Cinemacraft Encoder, but I've been trying different filters and learning how to do things as I go along. It's not something a lot of people probably "get" right away, but it's really not that tough to get the hang of. Definitely worth the effort though, IMHO.

[northcat_8]

You can do this with adobe premiere. Transform and crop (or clip) filters.

~thought if you had photoshop you might have premiere also 8)