png to transparent video

 png should be transperent according to your need.

ffmpeg -framerate 30 -loop 1 -i '/Users/jitendersingh/Desktop/Untitled-1.png' -c:v prores -pix_fmt yuva444p10le -t 10 /Users/jitendersingh/Desktop/Untitled-1.mov

os.system("ffmpeg -framerate 30 -loop 1 -i '/Users/jitendersingh/Desktop/Untitled-1.png' -c:v prores -pix_fmt yuva444p10le -t 10 /Users/jitendersingh/Desktop/Untitled-1.mov")

os.system("ffmpeg -framerate 30 -loop 1 -i '/Users/jitendersingh/Desktop/Untitled-1.png' -c:v prores -pix_fmt yuva444p10le -t 10 -vf \"drawtext=text='Your Text Here':x=10:y=10:fontsize=100:fontcolor=white\" /Users/jitendersingh/Desktop/Untitled-1.mov")

os.system("ffmpeg -i /Users/jitendersingh/Desktop/pexels.mp4 -i /Users/jitendersingh/Desktop/Untitled-1.mov -filter_complex \"[0:v][1:v]overlay=10:10:enable='between(t,0,10)'[out]\" -map '[out]' -map 0:a -c:v libx264 -c:a aac -strict experimental -b:a 192k /Users/jitendersingh/Desktop/output333.mp4")