I have a home theater setup and the beam is just barely too wide, and I'd like the video to come in a bit. I'm really surprised there is no was to zoom out, as in add black boxing to the video/squeeze it in. Any thoughts?
With O (key), you set auto-scaling to "Original Size". Then, Alt-O and Alt-Shift-O increase and decrease scale factor.
Take in mind that Alt-O and Alt-Shift-O don't work on "Scaled to screen" auto-scaling.
The hot keys are in this vlc page.
Looks like VLC has a zoom feature under Window > Video effects...
Video Magnification/Zoom In & Out
Another intriguing feature is Video Magnification. Under Geometry tab,
enable Magnification/Zoom option, to let it zoom in/out the video. You
will see a small window at top left corner with the main magnification
control. Fill in the triangle by clicking it to zoom into the video.
To view the desired video portion, move the square capturing screen
across the box.
VLC Player - Interactive zoom / Magnify
First go to VLC installation directory and than execute this command
vlc --video-filter "magnify" "path/to/video"
Related
I have multiple 1-minute videos taken outside (a building, a sea cliff, etc). The camera is not fixed, it's taken by a drone very slowly going up a cliff for example.
What I need to do, if even possible, is use OpenCV or other video processing framework to automatically add a path to each of those video, a red line.
The red line would follow the location pointed by the centre of the video frame.
It means that on each frame, I must find the locations pointed at on the previous/next frames via some sort of pattern recognition and somehow link them with an overlaid red line path.
Is there some sort of algorithm or tool that facilitate this process? How would you approach this problem?
Example:
From those frames:
*
*
*
*
To those frames:
(in the real, slow, footage, the consecutive frames would be much closer to each other)
Looks like for all frames, I must try to locate all the previous/next frames and link their centres as an rightly ordered line. Surely, that must have been done before?
I am working on iPhone application where i have included bright cove SDK to play video. I am able to play video but found letter boxing issue around sides of player view(black space on top and side bar). How can i avoid letterboxing around UIView corners? it would be great if you can provide any example or any sample code.I am attaching screenshot for player as well.
Get the ratio of the video from the video properties:
video.properties[kBCOVCatalogJSONKeyFLVFullLength][#"frameWidth"];
video.properties[kBCOVCatalogJSONKeyFLVFullLength][#"frameHeight"];
Then adjust the size of your video player view (playbackController.view) to suit the required height. This may involve the view being wider than its parent and clipping of the left and right sides, but will achieve the desired result.
I want to develop a feature into an application, by which an vintage projector effect can be given to a recording video or a pre recorded video. If you want i an share an image. i want the effect similar to it, one part of the recording video is showing in the bottom frame and the bottom part of the recording video is showing in the top frame. Along with this the whole view should shake like a real vintage projector recording.![enter image description here][1]
Did you take a look at GPUImage?
It has lots of options for video recording/processing and allows to add/combine different filters.
I have issue with cropping video and also need to expand video
cropping frame like native application, whenever User tapped on
cropping fame I need to expand video frames(thumbnails) and also want
to crop it, but I don't understand how to do it.
Here's a link to an open source control that you can use as a foundation.
https://github.com/andrei200287/SAVideoRangeSlider
This control already generates thumbnails from the source video and draws a linear trim bar with draggable handles that let you set the start/end point of the video. All you'd need to do is add some code to reload the trim bar with detailed images from around the time of the handle that's being dragged at the moment.
This control also comes with a sample app that exports the trimmed video from the selected start and end points.
Hopefully that's what you're looking for.
I am playing video in Blackberry,it plays well but i need to show the video in full screen mode.Now it plays video with spaces at top and bottom i have to play in full screen
For this i used methods
videoControl.setDisplayFullScreen(true);
_videoControl.setDisplaySize(Display.getWidth(),Display.getHeight());
But those are not working how can i solve this.
The video player can be incredibly fickle when it comes to what sizes it will display. From my testing, it seems that you have to hit one of the magic ratios (half size seemed to work pretty reliably) or it just won't show anything.
Rather than setting the size that would equal fullscreen as well as telling it to be fullscreen, you should probably use VideoControl.setDisplayFullScreen() without the setDisplaySize()
I have an answer about camera programming that might help Black berry camera programming