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Error using VideoWriter to write video frames to a file

조회 수: 23 (최근 30일)
Jason
Jason 2021년 3월 12일
댓글: Jason 2021년 3월 12일
Hello, I am trying to save a video from a FLIR camera using the gentl adaptor.
vid = videoinput('gentl', 1, 'Mono16');
src=getselectedsource(vid);
vid.FramesPerTrigger=20;
preview(vid);
start(vid);
stoppreview(vid);
diskLogger=VideoWriter('D:\Temp\VidMatlab.mp4','MPEG-4'); % Use the MPEG-4 Codec
open(diskLogger);
vid.FramesAvailable
data=getdata(vid,vid.FramesAvailable);
numFrames=size(data,4)
for x=1:numFrames
writeVideo(diskLogger,data(:,:,:,x));
end
close(diskLogger)
But I keep getting the error message
Warning: No video frames were written to this file. The file may be invalid.
Error using VideoWriter/writeVideo (line 414)
Operands to the || and && operators must be convertible to logical scalar values.
  댓글 수: 2
Jason
Jason 2021년 3월 12일
OK its this:
if (min(inputFrames(:)) < 0) || (max(inputFrames(:)) > 1)
error(message('MATLAB:audiovideo:VideoWriter:invalidRange', curDataType));
Jason
Jason 2021년 3월 12일
OK I have 2 errors:
1: data=getdata(vid,vid.FramesPerTrigger); rather than data=getdata(vid,vid.FramesAvailable)
2: For video, you must use Mono8

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Jan
Jan 2021년 3월 12일
Maybe the debugger reveals some details. Type this in the command window:
dbstop if caught error
Then run the code again. If Matlab stops at the error, check which arguments are not scalar in line 414 of videoWriter.

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