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Which pi is it?
Zero W!
Also, what is the command line you're using to invoke ffmpeg? Maybe you're missing some threading/optimisation options..
Most likely yes, it's currently 14 minutes into processing at crf 51 which is lowest quality...
ffmpeg -r 20 -i image%04d.jpg -r 20 -vcodec libx264 -crf 51 -vf scale=1280:720 output.mp4Fwiw the images are captured at 1280:720 too.
I can't figure out why -r 20 is needed as part of the input, it's on my list of things to drop out and see what happens.
rhb
@Greenbank
Interesting project. Which pi is it? Would have expected a pi 4 to be a bit faster than that, and wouldn't be surprised if an earlier pi was that slow.
Also, what is the command line you're using to invoke ffmpeg? Maybe you're missing some threading/optimisation options...