I get a writeVideo error on a script that previously worked

Jessica Yorzinski

2018 11 7

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I am trying to merge two videos. I have previously used this code on 2016b and it ran well. However, it suddenly stopped working. I'd appreciate any tips! I get this error: "Could not write a video frame." in response to this line in my code: writeVideo(outputVideo, imgt);

Here is the full code:

close all clearvars -except SpecificTrial

cd(SpecificTrial)

FirstVideo='GoPro_L_01.MP4'; SecondVideo='GoPro_L_02.MP4'; OutPutVideo='GoPro_L';

vid1 = VideoReader(FirstVideo); vid2 = VideoReader(SecondVideo);

videoPlayer = vision.VideoPlayer; outputVideo = VideoWriter(OutPutVideo); outputVideo.FrameRate = vid1.FrameRate; open(outputVideo);

VideoFrameRate=1/vid1.FrameRate; VideoDuration1=vid1.Duration*vid1.FrameRate; VideoDuration2=vid2.Duration*vid2.FrameRate;

for i=1:VideoDuration1 tf=hasFrame(vid1); if tf==1 img1 = readFrame(vid1); imgt=[img1]; step(videoPlayer, imgt);%play video writeVideo(outputVideo, imgt); %record new video end; end

for i=1:VideoDuration2 tf=hasFrame(vid2); if tf==1 img1 = readFrame(vid2); imgt=[img1]; step(videoPlayer, imgt); writeVideo(outputVideo, imgt); end; end

release(videoPlayer); close(outputVideo);