title: OpenCV cannot read some mp4 files, converting to avi doesn't help either
body: <p>I'm trying to read some video files that have mp4 format using OpenCV python. I didn't have any problem with any other mp4 video that I have used so far, but for some reason, videocapture cannot read these mp4 video files. My problem is not like <a href="https://stackoverflow.com/questions/13834399/cannot-open-mp4-video-files-using-opencv-2-4-3-python-2-7-in-windows-7-machi">this</a> (I already applied this renaming of mmpeg when I first installed opencv). Besides, as I mentioned earlier videocapture can read other mp4 videos, but not these ones. I also tried to convert the video into avi, but still videocapture cannot read the video (I use other avi files with no problem). The videos that I'm using come from <a href="https://cvhci.anthropomatik.kit.edu/~lrybok/projects/kitchen/" rel="nofollow noreferrer">this dataset</a>.  </p>