I have one video and in that video, I am tracking a car's particular point the video and I got success in that one
but I want to plot that (point on a vehicle) point's path at the same on video. How can I do that??
Please help me
Related
I got a video stream from a camera. I would like to overlay an FEA like 3D of one object that showing the stresses on the object dynamically changes.
Do you guys have any idea how to implement this?
Well, here is the thing. I'm now doing a project named html5 player with real time Gps showing on the map. It means that I need to show the current position on the map when the video is playing. Video file and Gpx file related to it are on my hands. I have already realized the player part and I have successfully added a map below the player. The map can already show the track of the video. What I need to do next is to show the position on the map(maybe a marker or icon on the map,showing that you are moving) with the video playing. They should be synchronized. So is there any function or method in Ol3 can realize this? What I have in my mind is that I parse the GPX file to extract time data and position data and then match the video file's current time to it. But it's kind of lot of calculation. I would appreciate that if u guys could help me out wiz this!
You can look at this sample:
http://openlayers.org/en/v3.14.2/examples/feature-move-animation.html
if you have calculated the path of your point, i suggest you use the map postcompos event to keep a smooth rendering
I am currently working on one application in which I am supposed to display the recording time while video recording is going on. Whats more interesting is that this recording time should also be there in the recorded video.
So I think I have two things to consider :
1.) Show recording time overlay while recording video
2.) Recording time should also be shown in the recorded video.
I know we can do the static text overlay while recording the video and then we add one text layer in recorded video. But in my case, this time value should be changed on every second.
I have searched a lot on google and stake overflow. Tried different solutions. By using GPUImage, By using AVMutableVideoComposition and CALayer. But they all are for static value.
May be I am nearer to my solution but not able to find it. So can anyone guide me on how can I achieve it?
Any help would be greatly appreciated.
Thanks
Use AVAssetReader for recorded video. Get the CMSampleBufferRef, get it timestamp, draw time on sample buffer, write buffer to AVAssetWriterInputPixelBufferAdaptor. Similar approach for video being recorded.
Is there a way to determine whether the front or rear camera was used to record a video that is selected from the camera roll?
I'm not aware of any meta-data or property associated with video's that Apple requires to be present for video's in your camera roll that could tell you this. And since you can't control where the clips on the camera roll came from, you have to rely on the absolute minimum amount of meta-data required for that file format.
Case in point, there is no guarantee whatsoever that a clip was even taken from a camera at all. If someone texted you a video file that they created from software, and you saved it to your camera roll, the concept of "Front or rear" camera would make no sense at all.
You could certainly keep track of clips that your app takes by storing them in a folder within your app and associating a camera position with each unique clip name, ([[NSProcessInfo processInfo] globallyUniqueString] is great for this)
i am able to show square preview of recording using AVCaptureVideoPreviewLayer class, But it saving video in rectangular in library. Instead of rectangle i want square video. I have used composition class to crop video and it is working but taking too much time. I check vine app which has square video output.
Please give me suggestion.
its late answer but it is used for another.. see the my ans
https://github.com/piemonte/PBJVision
record video in square