vtt/thubnailfolder/thumbnails.json not found

[shubho-acc]

vtt/SampleVideo_1280x720_10mb/thumbnails.json not found
events.js:183
throw er; // Unhandled 'error' event
^

Error: spawn identify ENOENT
at _errnoException (util.js:992:11)
at Process.ChildProcess._handle.onexit (internal/child_process.js:190:19)
at onErrorNT (internal/child_process.js:372:16)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickDomainCallback (internal/process/next_tick.js:218:9)

[sadi321]

I have the same issue. Please suggest the solution