videoreader reads frames very slowly. how can I improve it?

I have a movie, and selected list of frames (called frameNums) I want to read.

I tried reading them like this :

VR=VideoReader(aviFilename)
for t = 1:numel(frameNums)
    currFrameNum = frameNums(t)
    VR.read(currFrameNum)
    
    %do something%
end

but this does not read the exact current frame at some of my movies (a probelm which sevral of others already noticed). so I switched to this:

VR=VideoReader(aviFilename)
videoFrameCount=0
for t = 1:numel(frameNums)
    currFrameNum = frameNums(t)
    while (hasFrame(VR) && (currFrameNum~=videoFrameCount))
        CurrFrame = readFrame(VR);
        videoFrameCount=videoFrameCount+1;
    end
    
    %do something%
 end

which works out great, but if my first frame number is really big (like 22533) it takes forever to read the frame, and I cant work like that.

any tips of how to improve this?