Added feature to output video directly without saving frames to disk

[zubairahmed-ai]

Instead of creating individual frames and saving them to disk first then write a MP4 output file, I have added a feature to write to video directly without requiring frames on disk.

This feature first creates a .AVI output file then using FFMPEG we compress/convert it to MP4 file format.

Requirement to add ffmpy library

[zubairahmed-ai]

Yes will fix these tomorrow

[rakesh1ndivar]

how to use detect.py with custom data. I have cars data want to detect cars and id them. detect.py