ffmpeg

 ~/Downloads/SnowLeopard_Lion_Mountain_Lion_Mavericks_Yosemite_El-Captain_25/ffmpeg -f image2 -r 1/5 -i bicep2_sim_apo_E_relz%d.png -vcodec mpeg4 -y movie_Emode.mp4

convert

convert -trim input.png input-trimmed.png

Cosmology lectures

https://www.youtube.com/watch?v=eOOtl8DTmhQ


https://www.youtube.com/watch?v=41kX_bc2hok


https://www.youtube.com/watch?v=vJrl64TK2RY


Kip thorne's lectures
https://cosmolearning.org/courses/overview-of-gravitational-wave-science-400/