How can I read a video with frame width and height as 6*8? Cannot read a single frame by using read() function

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Yang Liu 2021-9-18

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https://ww2.mathworks.cn/matlabcentral/answers/1455824-how-can-i-read-a-video-with-frame-width-and-height-as-6-8-cannot-read-a-single-frame-by-using-read

评论： Walter Roberson 2021-9-22

tmpGetStiTimeFromFrametest.zip

I am reading the attached video with Matlab R2021a, but I get an empty matrix result. However, this video can be played with PotPlayer or read by python code.

Matlab code:

file = VideoReader('tmpGetStiTimeFromFrametest.mov');
frm = read(file);

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Yang Liu 2021-9-18

在 MATLAB Online 中打开

file = VideoReader('tmpGetStiTimeFromFrametest.mov');
frm = read(file);

and the result frm is []

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回答（1 个）

Ananya Tewari 2021-9-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1455824-how-can-i-read-a-video-with-frame-width-and-height-as-6-8-cannot-read-a-single-frame-by-using-read#answer_791779

在 MATLAB Online 中打开

exampleVideoFile.zip

Hi,

I tried to read the frames from the provided video but it seems there is some issue with the videofile itself. I also tried to open that in my Desktop but the video was not playing. You can try checking the videofile again and use the read().

At my end I used an example ".mov" videofile and it was working fine, attaching that here for your reference.

v = VideoReader("example.mov");
frm = read(v);

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Yang Liu 2021-9-22

@Walter Roberson The video is just a fre pixels cropped from a 720p, 120 frameRate video by ffmpeg. There is no interpolation.

Walter Roberson 2021-9-22

VLC is displaying at a lot larger than 6 x 8, and VLC is interpolating somehow.

That is, VLC knows the proper size of the video, but when it displays it in a larger window, it is not just replicating pixels; it is interpolating to a larger size when it displays. This is an issue with VLC.

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