Cropping Certain Areas

[-MajinLink-]

Let's say I wanted to crop at frame 100 to 200. Can this be done? If so, how?

Thanks.

[EvaFan]

Copied and pasted from:
http://avisynth.org/mediawiki/ApplyRange

ApplyRange is a special case of Animate where start_args = end_args, and present in v2.51. It can be used when you want to apply a certain filter on certain range of frames of a clip. Another difference with Animate is that args can't contain a clip. Starting from v2.53 it supports audio, and start_frame can be equal to end_frame (such that only one frame is processed).

Scroll down to the bottom and you see this:
ApplyRange(0,149,"Crop", 158,0,64,32)

Replace the first 0 with your start frame and 149 with your end frame. Then replace all the crop amounts with the amounts you desire.

KEEP IN MIND THAT IT SAYS YOU NEED V2.51 TO USE IT AND 2.53 OR HIGHER TO USE IT ON AUDIO.

[-MajinLink-]

Thanks, but I keep getting this VirtualDub error:

Avisynth open failure:
ApplyRange: Filtered and unfiltered video frame sizes must match

What's going on here?

[EvaFan]

The portion that you cropped has a different size than the rest of the video after cropping.

I've never used an applyrange before to crop a portion of the video. I'm guessing putting a LancsozResize(width,height) at the end of your script would fix it all. If not your gonna have to do another apply range after your first one:

ApplyRange(startframe,endframe,"LancsozResize", width,height)

Replace the the start and endframe with your desired frames and replace width and height with the #'s for the size you desire everything to be.

One of those should give you an end resulting video where everything is the same size. Obviously the portion that you cropped will have been stretched to fit the rest of the video's size. There is another Option if you don't want to stretch it.

ApplyRange(startframe,endframe,"Addborders", left,top,right,bottom)

The left top right and bottom will be the same numbers you cropped. Basically the video wont be stretched in this case it will just have the part where you cropped filled with black video.

If any of this is confusing to you then you need to give me the amounts you want to crop from left,top,right,bottom and the frames you want to change so I can make you a script. The stuff above isn't that confusing tho >_>.

[Jnzk]

And if by "cropping" you meant trimming, Trim(100,200) should do the trick.

[-MajinLink-]

Sorry for the delayed reply, Eva-Fan. Yeah, I just can't get this to work... Would you mind helping?

- Crop(4,2,-4,-0) for frames 1 to 32965.

- Crop an additional (2,0,-2,-0) off of frames 32966 to 33686.

I know I could just go Crop(6,2,-6,-0), but I really don't want to be croppin' off anymore from frames 1 to 32965. Frames 32966 to 33686 still show black bars that I would like to get rid of.

[EvaFan]

Sorry for the delayed reply, Eva-Fan. Yeah, I just can't get this to work... Would you mind helping?

- Crop(4,2,-4,-0) for frames 1 to 32965.

- Crop an additional (2,0,-2,-0) off of frames 32966 to 33686.

I know I could just go Crop(6,2,-6,-0), but I really don't want to be croppin' off anymore from frames 1 to 32965. Frames 32966 to 33686 still show black bars that I would like to get rid of.

From what I read you dont want black bars so we wont use addborders. Lanczosresize is a sharp resizer that preserves a pictures sharpness, However my personal favorite, BilinearResize. Sometimes lanczosresize can break edges when resizing. Bilinearresize can too but chances are it wont, it smoothes the image slightly as well.

I will assume the size of your video is 640x480 since you havent told me. If it isn't you need to replace the numbers with the size of the video before any cropping.

ApplyRange(0,32965,"Crop", 4,2,-4,-0)
ApplyRange(0,32965,"Bilinearresize", 640,480)
ApplyRange(32966,33686,"Crop", 2,0,-2,-0)
ApplyRange(32966,33686,"Bilinearresize", 640,480)

You could probably do it all with 1 applyrange and a hell of alot of complicated coding and commas... but i figured this would be easier for you to understand. Remember the 640x480 I'm putting in may not be what the size of your video is... I just assumed it's what it was since you never told me. Input the correct width,height if its not right.

[-MajinLink-]

Thanks, but I keep getting this VirtualDub error:

Avisynth open failure:
ApplyRange: Filtered and unfiltered video frame sizes must match

What's going on here?

I'm still getting this error. And will ApplyRange only work with v2.51?

[EvaFan]

Thanks, but I keep getting this VirtualDub error:

Avisynth open failure:
ApplyRange: Filtered and unfiltered video frame sizes must match

What's going on here?

I'm still getting this error. And will ApplyRange only work with v2.51?

Yes it works with 2.51 and above. I just tried it for the first time on a script of mine and it looks like the first applyrange cannot be completed without ouputting the same frame size as the rest of the video. Basically the script is failing before it gets to the other applyrange's and it wont continue that way. I'll toy with it after work tomorrow to see If I can get you a solution. I'm actually very interested in learning if there is a solution myself now.

[dokidoki]

Sorry for the delayed reply, Eva-Fan. Yeah, I just can't get this to work... Would you mind helping?
- Crop(4,2,-4,-0) for frames 1 to 32965.
- Crop an additional (2,0,-2,-0) off of frames 32966 to 33686.
I know I could just go Crop(6,2,-6,-0), but I really don't want to be croppin' off anymore from frames 1 to 32965. Frames 32966 to 33686 still show black bars that I would like to get rid of.

Note that the framecount starts at 0, but anyway...

a=[source]
b=a.Trim(1,32965).Crop(4,2,-4,-0).BilinearResize(640,480)
c=a.Trim(32966,33686).Crop(6,2,-6,-0).BilinearResize(640,480)
b+c