frame

Apropos of This question , there is a bit of scaffolding within the interpreter to inspect frame objects, which can be retrieved by sys._getframe() . The frame objects appear to be read only, but I can't find anything obvious in the docs that explicitly states this. Can someone confirm whether these objects are writeable (in some way) or read only? import sys def foobar(): xx='foo' ff = sys._getframe() ff.f_locals['xx'] = 'bar' print xx if __name__ == '__main__': foobar() This prints out ' foo ' when run but the post below demonstrates the variable being writable when run from the current

I want to download a single frame of a video file from a server from my android application. I do not wat to download the full video at front. Use that frame as a thumbnail to display to the user, so that if choosen by user it can be downloaded. dacwe ffmpeg can create a thumbnail from a video stream using this command: ffmpeg -itsoffset -4 -i http://somevideosite/test.avi -vcodec mjpeg -vframes 1\ -an -f rawvideo -s 320x240 thumb.jpg To get ffmpeg into android seems doable . It will be easier if your server provided thumbnails for each video like youtube/dailymotion does. You could create

I am trying to extract a fixed number of frames uniformly from a bunch of videos(say 50 frames from each video, 10,000 videos in total). Since the duration varies, I calculated the ideal output fps for each video and take it as a parameter for ffmpeg extraction, but failed to get the required number of frames. Does anyone know how to extract a fixed number of frames with ffmpeg, or other tools? Thanks! You could use the thumbnail filter. It picks one representative frame from every set of n frames (default is 100) So, if your source video is 10 minutes long and at 25 fps, then it has 15000

I happened to something strange to me on CALayer.And finally found the CALayer's frame.size not equal to its bounds.size, which I couldn't understand.I know frame is in the super's coordinate system and bounds is its own coordinate,and the usual case is frame.origin is not equal to bounds.origin but frame.size is equal to bounds.size. That is because you applied a transform, as apple says on the documentation for the frame property. Warning If the transform property is not the identity transform, the value of this property is undefined and therefore should be ignored. ... Changes to this

I have an image, and I would like to make the image link to an embedded YouTube video, such that if the user clicks on the image, it starts playing in the place where the picture used to be. Any thoughts on how I can accomplish this? Thank you, David Place the embedded video in a div that is invisible: <div id="video" style="display: none;"> embedded video code here </div> Then give the img an id too: <img id="videopic" src="videopic.jpg" alt="Video Picture" /> Then, put a link round the image pointing to some JavaScript which hides the image and shows the embedded video: <a href="javascript

#include "cv.h" #include "highgui.h" int main(int argc, char** argv) { CvCapture* capture=0; IplImage* frame=0; capture = cvCaptureFromAVI("C:\\boy walking back.avi"); // read AVI video if( !capture ) throw "Error when reading steam_avi"; cvNamedWindow( "w", 1); for( ; ; ) { /* int cvGrabFrame (CvCapture* capture); IplImage* cvRetrieveFrame (CvCapture* capture)*/ frame = cvQueryFrame( capture ); if(!frame) break; cvShowImage("w", frame); } cvWaitKey(0); // key press to close window cvDestroyWindow("w"); cvReleaseImage(&frame); } I am using openCV with VS2008. I have read in a video file and