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How to ignore the first and the last 10% of the videoCaption ?

asked 2018-07-04 09:37:08 -0500

azdoud.y gravatar image

updated 2019-06-19 11:27:03 -0500

Hello,

I've a video which starts by black stream and ends with black stream I want to ignore these parts while reading this capture

Mat frameReference;
double lengthAD = captRefrnc.get(CV_CAP_PROP_FRAME_COUNT);
int partBegin = 0.1*length;
captRefrnc.set(CV_CAP_PROP_POS_FRAMES,partBegin );
while(1){
    captRefrnc >> frameReference;
    if (frameReference.empty()){
        cout << " <<< AD sequence ended!  >>> " << sourceReference <<endl;
        break;
    }

but I can ignore the 10% part but how to ignore the 10% part at the end

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2 answers

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3

answered 2018-07-04 09:59:36 -0500

LBerger gravatar image

updated 2018-07-04 10:00:24 -0500

just use for :

int partBegin = 0.1*length;
captRefrnc.set(CV_CAP_PROP_POS_FRAMES,partBegin );
for (int i=partBegin;i<static_cast<int>(length*0.9);i++)
{
    captRefrnc >> frameReference;
    if (frameReference.empty()){
        cout << " <<< AD sequence ended!  >>> " <<endl;
        break;
    }
}
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3

answered 2018-07-04 10:05:34 -0500

maybe like this

Mat frameReference;
double lengthAD = captRefrnc.get(CV_CAP_PROP_FRAME_COUNT);
int partBegin = 0.1*length;
captRefrnc.set(CV_CAP_PROP_POS_FRAMES,partBegin );
while(1){
    captRefrnc >> frameReference;
    partBegin++;

    if (partBegin > 0.9*length){
         break;
    }
    if (frameReference.empty()){
        cout << " <<< AD sequence ended!  >>> " << sourceReference <<endl;
        break;
    }
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Asked: 2018-07-04 09:37:08 -0500

Seen: 48 times

Last updated: Jul 04 '18