Accelerate generating images by PIL to make it run on multiple processes #40
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… functions. Changed image file's name from 5 digits to 6 digits for generating long video
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When you run generate_result_video.py on a long video, generating images by PIL took the longest and that part was the bottle neck of the whole process. That part took about 2 hours for 2 hours video and it got reduced into about 20 min to make that part run on multiple processes in parallel with 8 cpu cores.
I also added the time calculation and progress bar output by tqdm on each part.