VideoReader is unable to read properties and frames

Hi everyone,

I have been using VideoReader() for a while, but have run into some issues after updating to Ubuntu 20.04. It seems that it isn't able to load any of the video properties, or the frames, anymore.

Reading a file with:

vid = VideoReader('The_Present.mp4');

I just get something like this:

General Properties:
            Name: 'The_Present.mp4'
            Path: '/media/max/RedPassport/ECoGData/Tobii/video_files'
        Duration: 258.6010
     CurrentTime: 258.6010
       NumFrames: 0

   Video Properties:
           Width: 0
          Height: 0
       FrameRate: 0
    BitsPerPixel: 0
     VideoFormat: ''

Reading a frame with

readFrame(vid)

results in

'No more frames available to read from file.'

When I loaded the same file on Ubuntu 18.04 I had no issues.

I suspect it is some issue with reading the codec. However, changing the codes on the movie file isn't an option as I need to preserve the information as is.

I tried to update gstreamer, but that didn't help.

I would apprechiate any help on this!

[Adam Danz]

I'm also having this problem with R2021a Update 4 / Windows 10. But sometimes it works.

It's frustrating.

Answer 1

[Maximilian Nentwich]

Updating Matlab from 2020a to 2020b solved this issue.