Hello Vinay,
The error suggests that MATLAB is unable to find the required file. You may check for the following to ensure things are going good.
- Ensure that the codec is installed correctly on your operating system.
- MATLAB R2013a might have limited support for certain codecs and video formats. Try converting your video to a more commonly supported format such as H.264 encoded .mp4.
- Use tools like VLC Media Player, HandBrake, or FFmpeg to convert your video file.
I hope this helps!