subprocess call ffmpeg (command line)

Question

I have been incorporating subprocess calls in my program. I have had no issues with subprocess calls for other commands, but I am having trouble getting the command line inp

Answer 1

'ffmpeg -r 10 -i frame%03d.png -r ntsc movie.mpg' should be fine. OTOH, If you don't need the power of frame%03d.png, frame*.png is a bit simpler.

If you want to "see the syntax for it if I replace 'movie.mpg' with a variable name", it looks something like this:

cmd = 'ffmpeg -r 10 -i "frame%%03d.png" -r ntsc "%s"' % moviename

We need to escape the % with an extra % to hide it from Python's % substitution machinery. I've also added double quotes " , to cope with the issues that tdelaney mentioned.