Moving video with Track Motion?

Mark05 wrote on 3/28/2005, 6:22 AM
Hello,

Is it possible to move a video in a track a little to the left so as to put a bad edge outside of the overscan area. I think it is possible with Track Motion, but does using track motion do a resample? I don't want to soften the video at all. Is this possible.
Also.....What exactly does "Stretch to fi" in the pan/crop are do? Does it degrade the video to switch this on?

Thanks,
Mark

Comments

Chienworks wrote on 3/28/2005, 6:55 AM
Anything you do to the video will cause it to be decompressed and recompressed. If you change the size at all it will also be resampled. If you don't resize it then neither track motion nor pan/crop will resample, but you'll still have to deal with the de/recompression.

"Stretch to fit" will resample the video frame to fit the project frame. Unless the video frame is already exactly the same size as the project frame, then yes it will resample.
BillyBoy wrote on 3/28/2005, 7:06 AM
You can size a source vid with either track motion or pan/crop. Generally track motion is used when you're combining two or more source videos in the same frame to make several movies play as one in a single finished frame. I bet some that never read manuals didn't even know you can do that. <wink>

To get rid of a bit, probably pan/crop is the better solution. Use the sizing handles after you click on the pan/crop button. What you're doing is zooming in a tad. This will push bad edges out of the frame. If you zoom in lots, then you may see some quality loss.

Once you click pan/crop you should see you vid in the work area. Right click on the vid in the work area, then pick 'match output aspect' this likely will cause your source video to jump (zoom) to fill the frame.

Depending on your source, some parts (typical for some still images) may now be out of frame. To remove the bad edges, generally tweaking using a corner handle is the best approach. Set the pan/crop controls to lock aspect ratio so you don't distort the image ratio then click on the arrow icon (normal edit tool) then grabbing a corner handle while holding down your left mouse drag in and towards the center. Note how the bounding box now limits what is in the frame. Adjust as necessary while watching in your preview window or on your external monitor. Set keyframes at bottom of work area if you want to resize (zoom/pan) over time.
Mark05 wrote on 3/28/2005, 8:49 AM
Hi Guys,

Thanks for the answers to my questions. However, I still would like to know if just moving the video along the x-axis, with no re-sizing will result in a softness of the video due to re-sampling? Billyboy...thanks for your suggestions. I really prefer not to crop or zoom in the video as I know that will result in re-sampled video. I have read the two parts in question (Track Motion, Pan/Crop) of the manual many times, but still question the re-sampling aspect. I have also perused this forum for some answers and came across a thread started by RichMacDonald on 2/16/05 in which he questions this. Has anyone done any more experimenting with this? The thread I refer to says that setting track properties to progressive will stop re-sampling. Is this true?
Thanks so much!
Mark
Chienworks wrote on 3/28/2005, 9:32 AM
Mark, i kinda thought i answered that. No, the video will not be resampled. However, since it will be decompressed and recompressed, there may be some degredation due to that.

Progressive (or field order in general) has nothing to do with resampling.