orm011 · December 7, 2021 02:46
diff --git a/gistfile1.txt b/gistfile1.txt
 # cheaply convert container only, given compatible internal codecs
 ffmpeg -i ../panama_loop/WtoxxHADnGk_0820.ts -map 0 -c copy WtoxxHADnGk_0820.mp4

 # extract every 150th frame (5s) (random ordering of files). jpeg preserve quality 
 ls ../panama_loop_mp4/ | shuf  | xargs -L 1 -I {} -P 20 bash -c "mkdir -p {} && ffmpeg -i ../panama_loop_mp4/{}  -vf 'select=not(mod(n\,150))'  -q:v 2 {}/frame_%06d.jpg" 

 ## need to add -vsync vpf above to avoid the same frame showing up multiple times
 ls ../panama_loop_mp4/ | shuf   |  xargs -L 1 -I{} -P 120 bash -c "mkdir -p {} && ffmpeg -filter_threads 1 -i ../panama_loop_mp4/{} -threads 1  -vf 'select=not(mod(n\,300)), scale=1008:-1' -vsync vfr -f image2 -q:v 2  -threads 1 -an {}/frame_%06d.jpg"
	# cheaply convert container only, given compatible internal codecs
	ffmpeg -i ../panama_loop/WtoxxHADnGk_0820.ts -map 0 -c copy WtoxxHADnGk_0820.mp4

	# extract every 150th frame (5s) (random ordering of files). jpeg preserve quality
	ls ../panama_loop_mp4/ \| shuf \| xargs -L 1 -I {} -P 20 bash -c "mkdir -p {} && ffmpeg -i ../panama_loop_mp4/{} -vf 'select=not(mod(n\,150))' -q:v 2 {}/frame_%06d.jpg"

	## need to add -vsync vpf above to avoid the same frame showing up multiple times
	ls ../panama_loop_mp4/ \| shuf \| xargs -L 1 -I{} -P 120 bash -c "mkdir -p {} && ffmpeg -filter_threads 1 -i ../panama_loop_mp4/{} -threads 1 -vf 'select=not(mod(n\,300)), scale=1008:-1' -vsync vfr -f image2 -q:v 2 -threads 1 -an {}/frame_%06d.jpg"