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VIDEO BLACK BORDERS CROPPING PROBLEM


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Dear Freind,

 

i am using VIDEOPAD 2.41, it works great and producing quality output video, i am just facing a problem when using crop effect, cropping remove video black borders or area that you don't want in your output video i.e. from top, bottom and left, right. when using crop effect aspect ratio "none" freely select the desired area, it works fine but not STRETCH the video to desired output size, for example you want to produce 320 x 240 resolution output video, the cropping effect will ZOOM the video Not STRETCHED, in this way some portion of video from left & right LOST in output video because of not Stretching and the black borders remain same in output video.

 

it really needs, Specially when you producing an output video for mobile devices as you want to see the video in FULL SCREEN without any black borders.

 

Therefore please help me if i am missing something..

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Hi

 

The first thing to note is that if your image or video does not have the aspect ration of 16:9

then it will have borders.

Under normal circumstances HD video (1920 x 1080 pixels or 1280 x 720 pixels) has a ratio of 1.77 (16:9) and in VP willnot show black borders on the left or right of the image. However,in the right hand preview window there will will be a grey bar at the top and bottom of the image. These however are NOT part of the image and will have no effect on the output. In fact with images or video of this aspect ratio (16:9) the frame is filled.

 

If your film or image is a different aspect say 4:3 (800x600 pixels or 320x240 pixels or multiple of) is has a ratio of 1.33 ( or 4:3...there are other ratios also in use.) If this is the case then your image or film will be displayed correctly in the full VP preview frame of ratio 1.77.

 

In fact, the height of your 4:3 clip or image is automatically adjusted to fill the frame vertically but as the aspect is reduced it is not as wide as "normal" video and there will be black borders on the right and left.

 

Note that VP will not EXPAND your clip to remove these borders as that would deform your image. Using the crop function you can alter the aspect ratio of your image or clip. Cropping however inevitably means losing some of your image.

 

If you want to fill the VP preview screen you must therefore crop your clip to an aspect ratio of 16:9. Do not use the "none" option or "original" option. Click the 16:9 radio button when you do your crop effect. As mentioned, this inevitably means losing the top and bottom (or top OR bottom)of your image or clip. (You can move the red frame up or down with some small degree of selection.)

 

Now with a ratio of 16:9 your image height will be expanded to fit the preview screen and the width will reach from side to side. There will be no black borders. Further still, your image will display the full width uncropped. It is up to you what proportion of the sky or foreground you wish to lose.

 

However, if you output this 16:9 film as 320 x 240 (1.33)format then the result is a 16:9 movie with borders top and bottom. (The overall frame having the 1.33 aspect.)

 

The rule therefore would be:

 

input 16:9 output 16:9 No borders-full frame.

 

input 4:3 output 4:3. No borders

 

input 16:9 output 4:3 Borders top and bottom

 

input 4:3 output 16:9 Borders right and left

 

If you have to mix formats then you must decide which takes preference in the output. :unsure:

 

Hope this helps

 

 

Nat

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  • 1 month later...

Hi Nat,

 

I found this post regarding borders and all very clear. However, my question is, can you alter the colour of the borders (background) so that instead of Black you can alter to white etc. I have still images I have sequenced into an animation but they are not drawn to 16:9 or 4:3 ratios so can't avoid the borders, however they are drawn onto a white background therefore changing the border (background) to white makes for a full screen as such with the one background colour. Any ideas?

 

Thanks, A.

 

Hi

 

The first thing to note is that if your image or video does not have the aspect ration of 16:9

then it will have borders.

Under normal circumstances HD video (1920 x 1080 pixels or 1280 x 720 pixels) has a ratio of 1.77 (16:9) and in VP willnot show black borders on the left or right of the image. However,in the right hand preview window there will will be a grey bar at the top and bottom of the image. These however are NOT part of the image and will have no effect on the output. In fact with images or video of this aspect ratio (16:9) the frame is filled.

 

If your film or image is a different aspect say 4:3 (800x600 pixels or 320x240 pixels or multiple of) is has a ratio of 1.33 ( or 4:3...there are other ratios also in use.) If this is the case then your image or film will be displayed correctly in the full VP preview frame of ratio 1.77.

 

In fact, the height of your 4:3 clip or image is automatically adjusted to fill the frame vertically but as the aspect is reduced it is not as wide as "normal" video and there will be black borders on the right and left.

 

Note that VP will not EXPAND your clip to remove these borders as that would deform your image. Using the crop function you can alter the aspect ratio of your image or clip. Cropping however inevitably means losing some of your image.

 

If you want to fill the VP preview screen you must therefore crop your clip to an aspect ratio of 16:9. Do not use the "none" option or "original" option. Click the 16:9 radio button when you do your crop effect. As mentioned, this inevitably means losing the top and bottom (or top OR bottom)of your image or clip. (You can move the red frame up or down with some small degree of selection.)

 

Now with a ratio of 16:9 your image height will be expanded to fit the preview screen and the width will reach from side to side. There will be no black borders. Further still, your image will display the full width uncropped. It is up to you what proportion of the sky or foreground you wish to lose.

 

However, if you output this 16:9 film as 320 x 240 (1.33)format then the result is a 16:9 movie with borders top and bottom. (The overall frame having the 1.33 aspect.)

 

The rule therefore would be:

 

input 16:9 output 16:9 No borders-full frame.

 

input 4:3 output 4:3. No borders

 

input 16:9 output 4:3 Borders top and bottom

 

input 4:3 output 16:9 Borders right and left

 

If you have to mix formats then you must decide which takes preference in the output. :unsure:

 

Hope this helps

 

 

Nat

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Hi

 

If your video or sequence of clips/images doesn't have the 16:9 ratio or a ratio of video that you don't want to crop then you can get a white border by adding a WHITE blank frame to the main sequence line and then adding your video clip(s) (by dragging from the media list) and dropping onto the overlay track. As you say your clips are a white background animation sequence they will appear against the white frame and will then seem to be a full frame (16:9) sequence.

Obviously the blank frame must have the same duration as your video clip.

 

When you have dropped it on the overlay track it will appear as a small frame usually at the centre bottom.

Right click the overlay and it will preview in the left hand screen with its controls beneath.

Right click the centre square of the arrow matrix to place your overlay image in the centre of the sequence frame then adjust its' size with the size slider. Slide the Opacity control fully to the right.

 

Your sequence will now have a white border.

 

This is probably the nearest you will get to what you are wanting.

 

If you have a Audio track associated with your animation sequence then you will probably want to separate it as it won't play when it's on the overlay track. Right click it in the media list and select "Save audio track as a separate file" You can then add it to one of the soundtracks where it will play OK.

 

Nat

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