[Kdenlive-devel] how do i crop video?

[sean darcy]

Dan Dennedy wrote:
> On Wed, Aug 12, 2009 at 7:54 PM, sean darcy<seandarcy2 at gmail.com> wrote:
>> With today's kdenlive svn and mlt git, I'm trying to put a 1990 school
>> play on dvd. I've copied it from vhs on a svhs deck to a camcorder, then
>> used dvgrab into the pc.
>>
>> The video has some noise around the edges. I'd like to crop it, and
>> insert black borders to fit ntsc size before conversion to mpeg.
>>
>> How do I do this in kdenlive? I can't find any "crop" tool.
> 
> There is a crop in the video effects list. It was added in version
> 0.7.3. It is not dependent upon any libs/plugins external to MLT, so I
> am surprised you do not see it as I know you run a very up-to-date
> system. If you run 'melt -query filters 2>&1 | grep crop' do you see
> it? If so, do you see a $prefix/share/apps/kdenlive/effects/crop.xml?
> 
OK, I'm blind, but now I see.

Now that I've found it, is there any way of seeing the effect? That is, 
from the monitor I can see about 10-14 pixels of noise on the bottom and 
left side. As I adjust the crop parameters, I don't see any change in 
the monitor. Should I? If not, it's realllly hard to guess the actual 
crop needed.

Once I do crop, is there some clever way of adding symmetrical black 
borders to bring the clip back to 720x480?

sean